Annotation of loncom/xml/lonxml.pm, revision 1.319

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.319   ! albertel    4: # $Id: lonxml.pm,v 1.318 2004/05/21 21:07:54 matthew 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 
1.315     albertel   43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
1.1       sakharuk   44: use strict;
1.167     albertel   45: use HTML::LCParser();
1.161     albertel   46: use HTML::TreeBuilder();
                     47: use HTML::Entities();
                     48: use Safe();
                     49: use Safe::Hole();
                     50: use Math::Cephes();
                     51: use Math::Random();
                     52: use Opcode();
1.271     www        53: use POSIX qw(strftime);
1.72      albertel   54: 
1.266     bowersj2   55: 
1.72      albertel   56: sub register {
1.141     albertel   57:   my ($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 $output='';
                    153:   if ($ENV{'browser.mathml'}) {
                    154:       $output='<?xml version="1.0"?>'
                    155:             .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
                    156:             .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
                    157:             .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
                    158:             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
                    159: 		.'xmlns="http://www.w3.org/TR/REC-html40">';
                    160:   } else {
                    161:       $output='<html>';
                    162:   }
                    163:   return $output;
                    164: }
                    165: 
                    166: sub xmlend {
1.278     www       167:     my $mode='xml';
                    168:     my $status='OPEN';
                    169:     if ($Apache::lonhomework::parsing_a_problem) {
                    170: 	$mode='problem';
                    171: 	$status=$Apache::inputtags::status[-1]; 
                    172:     }
1.298     albertel  173:     return &Apache::lonfeedback::list_discussion($mode,$status).'</html>';
1.119     www       174: }
                    175: 
                    176: sub tokeninputfield {
1.120     www       177:     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
                    178:     $defhost=~tr/a-z/A-Z/;
1.119     www       179:     return (<<ENDINPUTFIELD)
1.226     albertel  180: <script type="text/javascript">
1.120     www       181:     function updatetoken() {
                    182: 	var comp=new Array;
                    183:         var barcode=unescape(document.tokeninput.barcode.value);
                    184:         comp=barcode.split('*');
                    185:         if (typeof(comp[0])!="undefined") {
                    186: 	    document.tokeninput.codeone.value=comp[0];
                    187: 	}
                    188:         if (typeof(comp[1])!="undefined") {
                    189: 	    document.tokeninput.codetwo.value=comp[1];
                    190: 	}
                    191:         if (typeof(comp[2])!="undefined") {
                    192:             comp[2]=comp[2].toUpperCase();
                    193: 	    document.tokeninput.codethree.value=comp[2];
                    194: 	}
                    195:         document.tokeninput.barcode.value='';
                    196:     }  
                    197: </script>
                    198: <form method="post" name="tokeninput">
1.119     www       199: <table border="2" bgcolor="#FFFFBB">
                    200: <tr><th>DocID Checkin</th></tr>
                    201: <tr><td>
                    202: <table>
                    203: <tr>
                    204: <td>Scan in Barcode</td>
1.120     www       205: <td><input type="text" size="22" name="barcode" 
                    206: onChange="updatetoken()"/></td>
1.119     www       207: </tr>
                    208: <tr><td><i>or</i> Type in DocID</td>
                    209: <td>
                    210: <input type="text" size="5" name="codeone" />
1.120     www       211: <b><font size="+2">*</font></b>
1.119     www       212: <input type="text" size="5" name="codetwo" />
1.120     www       213: <b><font size="+2">*</font></b>
                    214: <input type="text" size="10" name="codethree" value="$defhost" 
                    215: onChange="this.value=this.value.toUpperCase()" />
1.119     www       216: </td></tr>
                    217: </table>
                    218: </td></tr>
                    219: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
                    220: </table>
                    221: </form>
                    222: ENDINPUTFIELD
1.112     www       223: }
                    224: 
1.116     www       225: sub maketoken {
1.118     www       226:     my ($symb,$tuname,$tudom,$tcrsid)=@_;
1.112     www       227:     unless ($symb) {
                    228: 	$symb=&Apache::lonnet::symbread();
                    229:     }
                    230:     unless ($tuname) {
                    231: 	$tuname=$ENV{'user.name'};
                    232:         $tudom=$ENV{'user.domain'};
                    233:         $tcrsid=$ENV{'request.course.id'};
                    234:     }
1.116     www       235: 
1.118     www       236:     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
                    237: }
                    238: 
                    239: sub printtokenheader {
1.133     albertel  240:     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
1.116     www       241:     unless ($token) { return ''; }
1.118     www       242: 
1.133     albertel  243:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    244:     unless ($tsymb) {
                    245: 	$tsymb=$symb;
1.118     www       246:     }
                    247:     unless ($tuname) {
1.133     albertel  248: 	$tuname=$name;
                    249:         $tudom=$domain;
                    250:         $tcrsid=$courseid;
1.118     www       251:     }
1.114     www       252: 
                    253:     my %reply=&Apache::lonnet::get('environment',
                    254:               ['firstname','middlename','lastname','generation'],
                    255:               $tudom,$tuname);
                    256:     my $plainname=$reply{'firstname'}.' '. 
                    257:                   $reply{'middlename'}.' '.
                    258:                   $reply{'lastname'}.' '.
                    259: 		  $reply{'generation'};
                    260: 
1.112     www       261:     if ($target eq 'web') {
1.145     www       262:         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
1.115     www       263: 	return 
1.221     albertel  264:  '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
1.284     www       265:                &mt('Checked out for').' '.$plainname.
                    266:                '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
                    267: 	       '<br />'.&mt('ID').': '.$idhash{$tuname}.
                    268: 	       '<br />'.&mt('CourseID').': '.$tcrsid.
                    269: 	       '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
                    270:                '<br />'.&mt('DocID').': '.$token.
                    271:                '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
1.112     www       272:     } else {
1.121     albertel  273:         return $token;
1.112     www       274:     }
1.68      www       275: }
                    276: 
1.70      www       277: sub fontsettings() {
                    278:     my $headerstring='';
                    279:     if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 
1.248     albertel  280: 	$headerstring.=
                    281: 	    '<meta Content-Type="text/html; charset=x-mac-roman">';
1.263     albertel  282:     } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
1.248     albertel  283: 	$headerstring.=
                    284: 	    '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
1.70      www       285:     }
                    286:     return $headerstring;
1.68      www       287: }
                    288: 
1.48      albertel  289: sub printalltags {
                    290:   my $temp;
                    291:   foreach $temp (sort keys %Apache::lonxml::alltags) {
1.141     albertel  292:     &Apache::lonxml::debug("$temp -- ".
                    293: 		  join(',',@{ $Apache::lonxml::alltags{$temp} }));
1.48      albertel  294:   }
                    295: }
1.31      sakharuk  296: 
1.3       sakharuk  297: sub xmlparse {
1.172     albertel  298:  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96      albertel  299: 
1.172     albertel  300:  &setup_globals($request,$target);
1.232     albertel  301:  &Apache::inputtags::initialize_inputtags();
                    302:  &Apache::outputtags::initialize_outputtags();
                    303:  &Apache::edit::initialize_edit();
1.287     albertel  304:  &Apache::londefdef::initialize_londefdef();
1.244     albertel  305: 
1.178     www       306: #
                    307: # do we have a course style file?
                    308: #
                    309: 
1.208     albertel  310:  if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
1.178     www       311:      my $bodytext=
                    312: 	 $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
                    313:      if ($bodytext) {
                    314:        my $location=&Apache::lonnet::filelocation('',$bodytext);
                    315:        my $styletext=&Apache::lonnet::getfile($location);
                    316:        if ($styletext ne '-1') {
                    317:           %style_for_target = (%style_for_target,
                    318:                           &Apache::style::styleparser($target,$styletext));
                    319:        }
                    320:     }
1.292     sakharuk  321:  } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
                    322:      my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
1.291     sakharuk  323:      my $styletext=&Apache::lonnet::getfile($location);
                    324:        if ($styletext ne '-1') {
                    325:           %style_for_target = (%style_for_target,
                    326:                           &Apache::style::styleparser($target,$styletext));
                    327:       }
1.178     www       328:  }
1.255     sakharuk  329: #&printalltags();
1.16      albertel  330:  my @pars = ();
1.23      albertel  331:  my $pwd=$ENV{'request.filename'};
                    332:  $pwd =~ s:/[^/]*$::;
                    333:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  334: 
1.3       sakharuk  335:  my $safeeval = new Safe;
1.40      albertel  336:  my $safehole = new Safe::Hole;
1.82      ng        337:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  338: #-------------------- Redefinition of the target in the case of compound target
                    339: 
                    340:  ($target, my @tenta) = split('&&',$target);
                    341: 
1.150     albertel  342:  my @stack = ();
1.3       sakharuk  343:  my @parstack = ();
1.17      albertel  344:  &initdepth;
1.67      www       345: 
1.101     albertel  346:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
                    347: 				   $safeeval,\%style_for_target);
1.255     sakharuk  348: 
1.125     www       349:  if ($ENV{'request.uri'}) {
                    350:     &writeallows($ENV{'request.uri'});
                    351:  }
1.281     albertel  352:  &do_registered_ssi();
1.204     albertel  353:  if ($Apache::lonxml::counter_changed) { &store_counter() }
1.3       sakharuk  354:  return $finaloutput;
1.106     www       355: }
                    356: 
                    357: sub htmlclean {
1.107     www       358:     my ($raw,$full)=@_;
1.106     www       359: 
                    360:     my $tree = HTML::TreeBuilder->new;
                    361:     $tree->ignore_unknown(0);
1.140     albertel  362: 
1.106     www       363:     $tree->parse($raw);
                    364: 
1.107     www       365:     my $output= $tree->as_HTML(undef,' ');
1.140     albertel  366: 
1.161     albertel  367:     $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
1.111     www       368:     $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
1.107     www       369:     unless ($full) {
                    370:        $output=~s/\<[\/]*(body|head|html)\>//gis;
                    371:     }
1.106     www       372: 
                    373:     $tree = $tree->delete;
                    374: 
                    375:     return $output;
1.15      albertel  376: }
                    377: 
1.191     albertel  378: sub latex_special_symbols {
1.272     albertel  379:     my ($string,$where)=@_;
1.235     sakharuk  380:     if ($where eq 'header') {
1.272     albertel  381: 	$string =~ s/(\\|_|\^)/ /g;
1.311     albertel  382: 	$string =~ s/(\$|%|\{|\})/\\$1/g;
1.273     sakharuk  383: 	$string =~ s/_/ /g;
1.311     albertel  384: 	$string=&Apache::lonprintout::character_chart($string);
                    385: 	# any & or # leftover should be safe to just escape
                    386:         $string=~s/([^\\])\&/$1\\\&/g;
                    387:         $string=~s/([^\\])\#/$1\\\#/g;
1.229     sakharuk  388:     } else {
1.312     albertel  389: 	$string=~s/\\/\\ensuremath{\\backslash}/g;
1.313     albertel  390: 	$string=~s/([^\\]|^)\%/$1\\\%/g;
                    391: 	$string=~s/([^\\]|^)(\$|_)/$1\\$2/g;
1.310     sakharuk  392: 	$string=~s/\$\$/\$\\\$/g;
                    393: 	$string=~s/\#\#/\#\\\#/g;
1.313     albertel  394:         $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
1.310     sakharuk  395: 	$string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
1.311     albertel  396: 	$string=&Apache::lonprintout::character_chart($string);
                    397: 	# any & or # leftover should be safe to just escape
1.313     albertel  398:         $string=~s/([^\\]|^)\&/$1\\\&/g;
                    399:         $string=~s/([^\\]|^)\#/$1\\\#/g;
1.310     sakharuk  400: #single { or } How to escape?
1.229     sakharuk  401:     }
1.272     albertel  402:     return $string;
1.188     sakharuk  403: }
                    404: 
1.101     albertel  405: sub inner_xmlparse {
                    406:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
                    407:   my $finaloutput = '';
                    408:   my $result;
                    409:   my $token;
1.258     albertel  410:   my $dontpop=0;
1.101     albertel  411:   while ( $#$pars > -1 ) {
                    412:     while ($token = $$pars['-1']->get_token) {
1.261     albertel  413:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
1.101     albertel  414: 	if ($metamode<1) {
1.190     albertel  415: 	    my $text=$token->[1];
1.193     albertel  416: 	    if ($token->[0] eq 'C' && $target eq 'tex') {
1.239     sakharuk  417: 		$text = '';
                    418: #		$text = '%'.$text."\n";
1.182     sakharuk  419: 	    }
1.190     albertel  420: 	    $result.=$text;
1.101     albertel  421: 	}
1.261     albertel  422:       } elsif (($token->[0] eq 'D')) {
                    423: 	if ($metamode<1 && $target eq 'web') {
                    424: 	    my $text=$token->[1];
                    425: 	    $result.=$text;
                    426: 	}
1.101     albertel  427:       } elsif ($token->[0] eq 'PI') {
1.261     albertel  428: 	if ($metamode<1 && $target eq 'web') {
1.101     albertel  429: 	  $result=$token->[2];
                    430: 	}
                    431:       } elsif ($token->[0] eq 'S') {
1.140     albertel  432: 	# add tag to stack
1.101     albertel  433: 	push (@$stack,$token->[1]);
                    434: 	# add parameters list to another stack
                    435: 	push (@$parstack,&parstring($token));
1.140     albertel  436: 	&increasedepth($token);
1.212     albertel  437: 	if ($Apache::lonxml::usestyle &&
                    438: 	    exists($$style_for_target{$token->[1]})) {
                    439: 	    $Apache::lonxml::usestyle=0;
                    440: 	    my $string=$$style_for_target{$token->[1]}.
                    441: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    442: 	    &Apache::lonxml::newparser($pars,\$string);
1.257     albertel  443: 	    $Apache::lonxml::style_values=$$parstack[-1];
1.259     albertel  444: 	    $Apache::lonxml::style_end_values=$$parstack[-1];
1.101     albertel  445: 	} else {
                    446: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    447: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  448: 	}
1.101     albertel  449:       } elsif ($token->[0] eq 'E') {
1.212     albertel  450: 	if ($Apache::lonxml::usestyle &&
                    451: 	    exists($$style_for_target{'/'."$token->[1]"})) {
                    452: 	    $Apache::lonxml::usestyle=0;
                    453: 	    my $string=$$style_for_target{'/'.$token->[1]}.
1.258     albertel  454: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
1.212     albertel  455: 	    &Apache::lonxml::newparser($pars,\$string);
1.259     albertel  456: 	    $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
                    457: 	    $Apache::lonxml::style_end_values='';
1.258     albertel  458: 	    $dontpop=1;
1.101     albertel  459: 	} else {
1.258     albertel  460: 	    #clear out any tags that didn't end
                    461: 	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
                    462: 		my $lasttag=$$stack[-1];
1.317     albertel  463: 		if ($token->[1] =~ /^\Q$lasttag\E$/i) {
1.258     albertel  464: 		    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' as end tag to &lt;'.$$stack[-1].'&gt;');
                    465: 		    last;
                    466: 		} else {
                    467: 		    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' when looking for &lt;/'.$$stack[-1].'&gt; in file');
                    468: 		    &end_tag($stack,$parstack,$token);
                    469: 		}
                    470: 	    }
                    471: 	    $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    472: 			       $parstack, $pars,$safeeval, $style_for_target);
1.101     albertel  473: 	}
                    474:       } else {
                    475: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    476:       }
                    477:       #evaluate variable refs in result
1.282     albertel  478:       if ($Apache::lonxml::post_evaluate &&$result ne "") {
1.257     albertel  479: 	  my $extras;
                    480: 	  if (!$Apache::lonxml::usestyle) {
                    481: 	      $extras=$Apache::lonxml::style_values;
                    482: 	  }
1.101     albertel  483: 	if ( $#$parstack > -1 ) {
1.257     albertel  484: 	  $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
1.101     albertel  485: 	} else {
1.257     albertel  486: 	  $result= &Apache::run::evaluate($result,$safeeval,$extras);
1.101     albertel  487: 	}
1.163     albertel  488:       }
1.282     albertel  489:       $Apache::lonxml::post_evaluate=1;
                    490: 
1.190     albertel  491:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.249     albertel  492: 	  #Style file definitions should be correct
1.250     albertel  493: 	  if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
1.311     albertel  494: 	      $result=&latex_special_symbols($result);
1.249     albertel  495: 	  }
1.190     albertel  496:       }
                    497: 
1.169     albertel  498:       if ($Apache::lonxml::redirection) {
                    499: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    500:       } else {
                    501: 	$finaloutput.=$result;
                    502:       }
                    503:       $result = '';
                    504: 
1.258     albertel  505:       if ($token->[0] eq 'E' && !$dontpop) {
1.101     albertel  506: 	&end_tag($stack,$parstack,$token);
                    507:       }
1.258     albertel  508:       $dontpop=0;
1.224     albertel  509:     }	
1.212     albertel  510:     if ($#$pars > -1) {
                    511: 	pop @$pars;
                    512: 	pop @Apache::lonxml::pwd;
                    513:     }
1.101     albertel  514:   }
                    515: 
                    516:   # if ($target eq 'meta') {
                    517:   #   $finaloutput.=&endredirection;
                    518:   # }
                    519: 
1.169     albertel  520: 
1.101     albertel  521:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    522:     $finaloutput=&afterburn($finaloutput);
1.216     sakharuk  523:   }	    
1.101     albertel  524:   return $finaloutput;
                    525: }
1.67      www       526: 
1.318     matthew   527: ## 
                    528: ## Looks to see if there is a subroutine defined for this tag.  If so, call it,
                    529: ## otherwise do not call it as we do not know what it is.
                    530: ##
1.7       albertel  531: sub callsub {
1.84      albertel  532:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  533:   my $currentstring='';
1.72      albertel  534:   my $nodefault;
1.7       albertel  535:   {
1.59      albertel  536:     my $sub1;
1.7       albertel  537:     no strict 'refs';
1.68      www       538:     my $tag=$token->[1];
1.236     www       539: # get utterly rid of extended html tags
                    540:     if ($tag=~/^x\-/i) { return ''; }
1.141     albertel  541:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       542:     if (!$space) {
1.141     albertel  543:      	$tag=~tr/A-Z/a-z/;
1.68      www       544: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  545: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       546:     }
1.97      albertel  547: 
                    548:     my $deleted=0;
                    549:     $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
                    550:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    551:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    552: 					     $parstack,$parser,$safeeval,
                    553: 					     $style);
                    554:     }
                    555:     if (!$deleted) {
                    556:       if ($space) {
1.220     albertel  557: 	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  558: 	$sub1="$space\:\:$sub";
                    559: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    560: 					     $parstack,$parser,$safeeval,
                    561: 					     $style);
                    562:       } else {
1.318     matthew   563:           if ($target eq 'tex') {
                    564:               # throw away tag name
                    565:               return '';
                    566:           }
1.220     albertel  567: 	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
1.97      albertel  568: 	if ($metamode <1) {
                    569: 	  if (defined($token->[4]) && ($metamode < 1)) {
                    570: 	    $currentstring = $token->[4];
                    571: 	  } else {
                    572: 	    $currentstring = $token->[2];
                    573: 	  }
1.62      sakharuk  574: 	}
1.7       albertel  575:       }
1.97      albertel  576:       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
                    577:       if ($currentstring eq '' && $nodefault eq '') {
                    578: 	if ($target eq 'edit') {
1.220     albertel  579: 	  #&Apache::lonxml::debug("doing default edit for $token->[1]");
1.97      albertel  580: 	  if ($token->[0] eq 'S') {
                    581: 	    $currentstring = &Apache::edit::tag_start($target,$token);
                    582: 	  } elsif ($token->[0] eq 'E') {
                    583: 	    $currentstring = &Apache::edit::tag_end($target,$token);
                    584: 	  }
                    585: 	} elsif ($target eq 'modified') {
                    586: 	  if ($token->[0] eq 'S') {
                    587: 	    $currentstring = $token->[4];
                    588: 	    $currentstring.=&Apache::edit::handle_insert();
1.210     www       589: 	  } elsif ($token->[0] eq 'E') {
                    590: 	    $currentstring = $token->[2];
                    591:             $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
1.97      albertel  592: 	  } else {
                    593: 	    $currentstring = $token->[2];
                    594: 	  }
1.72      albertel  595: 	}
                    596:       }
1.7       albertel  597:     }
                    598:     use strict 'refs';
                    599:   }
                    600:   return $currentstring;
1.82      ng        601: }
                    602: 
1.96      albertel  603: sub setup_globals {
1.172     albertel  604:   my ($request,$target)=@_;
                    605:   $Apache::lonxml::request=$request;
1.99      albertel  606:   $Apache::lonxml::registered = 0;
1.205     www       607:   $errorcount=0;
                    608:   $warningcount=0;
1.207     albertel  609:   $Apache::lonxml::default_homework_loaded=0;
1.212     albertel  610:   $Apache::lonxml::usestyle=1;
1.204     albertel  611:   &init_counter();
1.101     albertel  612:   @Apache::lonxml::pwd=();
1.124     albertel  613:   @Apache::lonxml::extlinks=();
1.281     albertel  614:   @Apache::lonxml::ssi_info=();
1.282     albertel  615:   $Apache::lonxml::post_evaluate=1;
1.295     albertel  616:   $Apache::lonxml::warnings_error_header='';
1.96      albertel  617:   if ($target eq 'meta') {
                    618:     $Apache::lonxml::redirection = 0;
                    619:     $Apache::lonxml::metamode = 1;
                    620:     $Apache::lonxml::evaluate = 1;
                    621:     $Apache::lonxml::import = 0;
1.129     albertel  622:   } elsif ($target eq 'answer') {
                    623:     $Apache::lonxml::redirection = 0;
                    624:     $Apache::lonxml::metamode = 1;
                    625:     $Apache::lonxml::evaluate = 1;
                    626:     $Apache::lonxml::import = 1;
1.96      albertel  627:   } elsif ($target eq 'grade') {
                    628:     &startredirection;
                    629:     $Apache::lonxml::metamode = 0;
                    630:     $Apache::lonxml::evaluate = 1;
                    631:     $Apache::lonxml::import = 1;
                    632:   } elsif ($target eq 'modified') {
                    633:     $Apache::lonxml::redirection = 0;
                    634:     $Apache::lonxml::metamode = 0;
                    635:     $Apache::lonxml::evaluate = 0;
                    636:     $Apache::lonxml::import = 0;
                    637:   } elsif ($target eq 'edit') {
                    638:     $Apache::lonxml::redirection = 0;
                    639:     $Apache::lonxml::metamode = 0;
                    640:     $Apache::lonxml::evaluate = 0;
                    641:     $Apache::lonxml::import = 0;
1.163     albertel  642:   } elsif ($target eq 'analyze') {
                    643:     $Apache::lonxml::redirection = 0;
                    644:     $Apache::lonxml::metamode = 0;
                    645:     $Apache::lonxml::evaluate = 1;
                    646:     $Apache::lonxml::import = 1;
1.96      albertel  647:   } else {
                    648:     $Apache::lonxml::redirection = 0;
                    649:     $Apache::lonxml::metamode = 0;
                    650:     $Apache::lonxml::evaluate = 1;
                    651:     $Apache::lonxml::import = 1;
                    652:   }
                    653: }
                    654: 
1.82      ng        655: sub init_safespace {
                    656:   my ($target,$safeeval,$safehole,$safeinit) = @_;
                    657:   $safeeval->permit("entereval");
                    658:   $safeeval->permit(":base_math");
                    659:   $safeeval->permit("sort");
1.286     albertel  660:   $safeeval->permit("time");
1.82      ng        661:   $safeeval->deny(":base_io");
1.102     albertel  662:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.251     albertel  663:   $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
1.82      ng        664:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
                    665:   
                    666:   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
                    667:   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
                    668:   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
                    669:   $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
                    670:   $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
                    671:   $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
                    672:   $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
                    673:   $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
                    674:   $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
                    675:   $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
                    676:   $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
                    677:   $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
                    678:   $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
                    679:   $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
                    680:   $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
                    681:   $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
                    682:   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
                    683:   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
                    684:   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.215     albertel  685:   
                    686:   $safehole->wrap(\&Math::Cephes::bdtr  ,$safeeval,'&bdtr'  );
                    687:   $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
                    688:   $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
                    689:   $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
                    690:   $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
                    691:   $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
                    692:   $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
                    693:   $safehole->wrap(\&Math::Cephes::fdtr  ,$safeeval,'&fdtr'  );
                    694:   $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
                    695:   $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
                    696:   $safehole->wrap(\&Math::Cephes::gdtr  ,$safeeval,'&gdtr'  );
                    697:   $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
                    698:   $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
                    699:   $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
                    700:   $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
                    701:   $safehole->wrap(\&Math::Cephes::ndtr  ,$safeeval,'&ndtr'  );
                    702:   $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
                    703:   $safehole->wrap(\&Math::Cephes::pdtr  ,$safeeval,'&pdtr'  );
                    704:   $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
                    705:   $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
                    706:   $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
                    707:   $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
                    708: 
                    709: #  $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
                    710: #  $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
                    711: #  $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
                    712: #  $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
                    713: #  $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
                    714: #  $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
                    715: 
1.91      ng        716:   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
                    717:   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
                    718:   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
                    719:   $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
                    720:   $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
                    721:   $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
                    722:   $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
                    723:   $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
                    724:   $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
                    725:   $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
                    726:   $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93      ng        727:   $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91      ng        728:   $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
                    729:   $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
                    730:   $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
                    731:   $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
                    732:   $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
                    733:   $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
                    734:   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
                    735:   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
                    736:   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
1.305     albertel  737:   $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
1.311     albertel  738:   $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
1.91      ng        739: 
1.82      ng        740: #need to inspect this class of ops
                    741: # $safeeval->deny(":base_orig");
1.91      ng        742:   $safeinit .= ';$external::target="'.$target.'";';
1.121     albertel  743:   my $rndseed;
1.123     albertel  744:   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    745:   $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
1.319   ! albertel  746:   $safeinit .= ';$external::randomseed="'.$rndseed.'";';
1.249     albertel  747:   &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.82      ng        748:   &Apache::run::run($safeinit,$safeeval);
1.303     albertel  749: 
                    750:   my $subroutine=<<'EVALUATESUB';
                    751: sub __LC_INTERNAL_EVALUATE__ {
                    752:     my ($__LC__a,$__LC__b,$__LC__c)=@_;
                    753:     my $__LC__prefix;
                    754:     while(1){
                    755: 	{ 
1.306     albertel  756: 	    use strict;
                    757: 	    no strict "vars";
1.303     albertel  758: 	    if (eval(defined(eval($__LC__a.$__LC__b)))) {
1.306     albertel  759: 		return $__LC__prefix.eval($__LC__a.$__LC__b.$__LC__c);
1.303     albertel  760: 	    }
                    761: 	}
                    762: 	$__LC__prefix.=substr($__LC__a,0,1,"");
                    763: 	if ($__LC__a!~/^(\$|&|\#)/) { last; }
                    764:     }
1.306     albertel  765:     return $__LC__prefix.$__LC__a.$__LC__b.$__LC__c;
1.303     albertel  766: }
                    767: EVALUATESUB
                    768:     $safeeval->permit("require");
                    769:     $safeeval->reval($subroutine);
                    770:     $safeeval->deny("require");
1.207     albertel  771: }
                    772: 
                    773: sub default_homework_load {
                    774:     my ($safeeval)=@_;
                    775:     &Apache::lonxml::debug('Loading default_homework');
                    776:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1.241     albertel  777:     if ($default eq -1) {
1.207     albertel  778: 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
                    779:     } else {
                    780: 	&Apache::run::run($default,$safeeval);
                    781: 	$Apache::lonxml::default_homework_loaded=1;
                    782:     }
1.17      albertel  783: }
                    784: 
1.55      albertel  785: sub startredirection {
                    786:   $Apache::lonxml::redirection++;
                    787:   push (@Apache::lonxml::outputstack, '');
                    788: }
                    789: 
                    790: sub endredirection {
                    791:   if (!$Apache::lonxml::redirection) {
1.72      albertel  792:     &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1.55      albertel  793:     return '';
                    794:   }
                    795:   $Apache::lonxml::redirection--;
                    796:   pop @Apache::lonxml::outputstack;
1.97      albertel  797: }
                    798: 
                    799: sub end_tag {
                    800:   my ($tagstack,$parstack,$token)=@_;
                    801:   pop(@$tagstack);
                    802:   pop(@$parstack);
                    803:   &decreasedepth($token);
1.55      albertel  804: }
                    805: 
1.17      albertel  806: sub initdepth {
                    807:   @Apache::lonxml::depthcounter=();
                    808:   $Apache::lonxml::depth=-1;
                    809:   $Apache::lonxml::olddepth=-1;
                    810: }
                    811: 
                    812: sub increasedepth {
1.19      albertel  813:   my ($token) = @_;
1.17      albertel  814:   $Apache::lonxml::depth++;
                    815:   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
                    816:   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
                    817:     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
                    818:   }
1.42      albertel  819:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  820:   &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54      albertel  821: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  822: }
                    823: 
                    824: sub decreasedepth {
1.19      albertel  825:   my ($token) = @_;
1.17      albertel  826:   $Apache::lonxml::depth--;
1.36      albertel  827:   if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
                    828:     $#Apache::lonxml::depthcounter--;
                    829:     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
                    830:   }
1.43      albertel  831:   if (  $Apache::lonxml::depth < -1) {
1.280     www       832:     &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1.43      albertel  833:     $Apache::lonxml::depth='-1';
                    834:   }
1.42      albertel  835:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  836:   &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54      albertel  837: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  838: }
1.19      albertel  839: 
1.180     albertel  840: sub get_all_text_unbalanced {
1.190     albertel  841: #there is a copy of this in lonpublisher.pm
1.180     albertel  842:  my($tag,$pars)= @_;
                    843:  my $token;
                    844:  my $result='';
                    845:  $tag='<'.$tag.'>';
                    846:  while ($token = $$pars[-1]->get_token) {
                    847:    if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    848:      $result.=$token->[1];
                    849:    } elsif ($token->[0] eq 'PI') {
                    850:      $result.=$token->[2];
                    851:    } elsif ($token->[0] eq 'S') {
                    852:      $result.=$token->[4];
                    853:    } elsif ($token->[0] eq 'E')  {
                    854:      $result.=$token->[2];
                    855:    }
1.316     albertel  856:    if ($result =~ /(.*)\Q$tag\E(.*)/is) {
1.180     albertel  857:      &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    858:      &Apache::lonxml::debug('Result is :'.$1);
                    859:      $result=$1;
                    860:      my $redo=$tag.$2;
                    861:      &Apache::lonxml::newparser($pars,\$redo);
                    862:      last;
                    863:    }
                    864:  }
                    865:  return $result
1.204     albertel  866: }
                    867: 
                    868: sub increment_counter {
1.247     albertel  869:     my ($increment) = @_;
1.289     sakharuk  870:     if (defined($increment) && $increment gt 0) {
                    871: 	$Apache::lonxml::counter+=$increment;
                    872:     } else {
                    873: 	$Apache::lonxml::counter++;
1.247     albertel  874:     }
1.289     sakharuk  875:     $Apache::lonxml::counter_changed=1;
1.204     albertel  876: }
                    877: 
                    878: sub init_counter {
                    879:     if (defined($ENV{'form.counter'})) {
                    880: 	$Apache::lonxml::counter=$ENV{'form.counter'};
1.247     albertel  881: 	$Apache::lonxml::counter_changed=0;
1.237     sakharuk  882:     } else {
1.204     albertel  883: 	$Apache::lonxml::counter=1;
1.247     albertel  884: 	$Apache::lonxml::counter_changed=1;
1.204     albertel  885:     }
                    886: }
                    887: 
                    888: sub store_counter {
                    889:     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
                    890:     return '';
1.180     albertel  891: }
                    892: 
1.19      albertel  893: sub get_all_text {
1.270     albertel  894:     my($tag,$pars,$style)= @_;
                    895:     my $gotfullstack=1;
                    896:     if (ref($pars) ne 'ARRAY') {
                    897: 	$gotfullstack=0;
                    898: 	$pars=[$pars];
                    899:     }
                    900:     if (ref($style) ne 'HASH') {
                    901: 	$style={};
                    902:     }
                    903:     my $depth=0;
                    904:     my $token;
                    905:     my $result='';
                    906:     if ( $tag =~ m:^/: ) { 
                    907: 	my $tag=substr($tag,1); 
                    908: 	#&Apache::lonxml::debug("have:$tag:");
                    909: 	my $top_empty=0;
                    910: 	while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
                    911: 	    while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
                    912: 		#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
                    913: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    914: 		    $result.=$token->[1];
                    915: 		} elsif ($token->[0] eq 'PI') {
                    916: 		    $result.=$token->[2];
                    917: 		} elsif ($token->[0] eq 'S') {
1.316     albertel  918: 		    if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
                    919: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                    920: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel  921: 		    $result.=$token->[4];
                    922: 		} elsif ($token->[0] eq 'E')  {
1.316     albertel  923: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1.270     albertel  924: 		    #skip sending back the last end tag
1.283     albertel  925: 		    if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1.270     albertel  926: 			my $string=
                    927: 			    '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
                    928: 				$$style{'/'.$token->[1]}.
                    929: 				    $token->[2].
                    930: 					'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    931: 			&Apache::lonxml::newparser($pars,\$string);
                    932: 			#&Apache::lonxml::debug("reParsing $string");
                    933: 			next;
                    934: 		    }
                    935: 		    if ($depth > -1) {
                    936: 			$result.=$token->[2];
                    937: 		    } else {
                    938: 			$$pars[-1]->unget_token($token);
                    939: 		    }
                    940: 		}
                    941: 	    }
                    942: 	    if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
                    943: 	    if (($depth >=0) && ($#$pars > 0) ) {
                    944: 		pop(@$pars);
                    945: 		pop(@Apache::lonxml::pwd);
                    946: 	    }
                    947: 	}
                    948: 	if ($top_empty && $depth >= 0) {
                    949: 	    #never found the end tag ran out of text, throw error send back blank
                    950: 	    &error('Never found end tag for &lt;'.$tag.
                    951: 		   '&gt; current string <pre>'.
1.314     albertel  952: 		   &HTML::Entities::encode($result,'<>&"').
1.270     albertel  953: 		   '</pre>');
                    954: 	    if ($gotfullstack) {
                    955: 		my $newstring='</'.$tag.'>'.$result;
                    956: 		&Apache::lonxml::newparser($pars,\$newstring);
                    957: 	    }
                    958: 	    $result='';
                    959: 	}
                    960:     } else {
                    961: 	while ($#$pars > -1) {
                    962: 	    while ($token = $$pars[-1]->get_token) {
                    963: 		#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                    964: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||
                    965: 		    ($token->[0] eq 'D')) {
                    966: 		    $result.=$token->[1];
                    967: 		} elsif ($token->[0] eq 'PI') {
                    968: 		    $result.=$token->[2];
                    969: 		} elsif ($token->[0] eq 'S') {
1.316     albertel  970: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) {
1.270     albertel  971: 			$$pars[-1]->unget_token($token); last;
                    972: 		    } else {
                    973: 			$result.=$token->[4];
                    974: 		    }
1.316     albertel  975: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                    976: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel  977: 		} elsif ($token->[0] eq 'E')  {
                    978: 		    $result.=$token->[2];
                    979: 		}
                    980: 	    }
                    981: 	    if (($#$pars > 0) ) {
                    982: 		pop(@$pars);
                    983: 		pop(@Apache::lonxml::pwd);
                    984: 	    } else { last; }
                    985: 	}
                    986:     }
                    987:     #&Apache::lonxml::debug("Exit:$result:");
                    988:     return $result
1.19      albertel  989: }
                    990: 
1.23      albertel  991: sub newparser {
                    992:   my ($parser,$contentref,$dir) = @_;
1.167     albertel  993:   push (@$parser,HTML::LCParser->new($contentref));
1.56      albertel  994:   $$parser['-1']->xml_mode('1');
1.23      albertel  995:   if ( $dir eq '' ) {
                    996:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                    997:   } else {
                    998:     push (@Apache::lonxml::pwd, $dir);
                    999:   } 
                   1000: }
1.1       sakharuk 1001: 
1.8       albertel 1002: sub parstring {
                   1003:   my ($token) = @_;
                   1004:   my $temp='';
1.142     albertel 1005:   foreach (@{$token->[3]}) {
1.35      www      1006:     unless ($_=~/\W/) {
1.42      albertel 1007:       my $val=$token->[2]->{$_};
1.231     albertel 1008:       $val =~ s/([\%\@\\\"\'])/\\$1/g;
1.51      albertel 1009:       #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.267     sakharuk 1010:       $temp .= "my \$$_=\"$val\";";
1.20      albertel 1011:     }
1.142     albertel 1012:   }
1.8       albertel 1013:   return $temp;
                   1014: }
1.22      albertel 1015: 
1.34      www      1016: sub writeallows {
1.126     www      1017:     unless ($#extlinks>=0) { return; }
1.34      www      1018:     my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1.111     www      1019:     if ($ENV{'httpref.'.$thisurl}) {
                   1020: 	$thisurl=$ENV{'httpref.'.$thisurl};
                   1021:     }
1.34      www      1022:     my $thisdir=$thisurl;
                   1023:     $thisdir=~s/\/[^\/]+$//;
                   1024:     my %httpref=();
1.142     albertel 1025:     foreach (@extlinks) {
1.34      www      1026:        $httpref{'httpref.'.
1.125     www      1027:  	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1.142     albertel 1028:     }
1.126     www      1029:     @extlinks=();
1.34      www      1030:     &Apache::lonnet::appenv(%httpref);
                   1031: }
                   1032: 
1.281     albertel 1033: sub register_ssi {
                   1034:     my ($url,%form)=@_;
                   1035:     push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
                   1036:     return '';
                   1037: }
                   1038: 
                   1039: sub do_registered_ssi {
                   1040:     foreach my $info (@Apache::lonxml::ssi_info) {
                   1041: 	my %form=%{ $info->{'form'}};
                   1042: 	my $url=$info->{'url'};
                   1043: 	&Apache::lonnet::ssi($url,%form);
                   1044:     }
                   1045: }
1.66      www      1046: #
                   1047: # Afterburner handles anchors, highlights and links
                   1048: #
                   1049: sub afterburn {
                   1050:     my $result=shift;
1.154     albertel 1051:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1052: 					    ['highlight','anchor','link']);
1.66      www      1053:     if ($ENV{'form.highlight'}) {
1.142     albertel 1054:        foreach (split(/\,/,$ENV{'form.highlight'})) {
1.66      www      1055:            my $anchorname=$_;
                   1056: 	   my $matchthis=$anchorname;
                   1057:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1058:            $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1059:        }
1.66      www      1060:     }
                   1061:     if ($ENV{'form.link'}) {
1.142     albertel 1062:        foreach (split(/\,/,$ENV{'form.link'})) {
1.66      www      1063:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1064: 	   my $matchthis=$anchorname;
                   1065:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1066:            $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1067:        }
1.66      www      1068:     }
                   1069:     if ($ENV{'form.anchor'}) {
                   1070:         my $anchorname=$ENV{'form.anchor'};
                   1071: 	my $matchthis=$anchorname;
                   1072:         $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1073:         $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1.66      www      1074:         $result.=(<<"ENDSCRIPT");
1.226     albertel 1075: <script type="text/javascript">
1.66      www      1076:     document.location.hash='$anchorname';
                   1077: </script>
                   1078: ENDSCRIPT
                   1079:     }
                   1080:     return $result;
                   1081: }
                   1082: 
1.79      www      1083: sub storefile {
                   1084:     my ($file,$contents)=@_;
1.290     albertel 1085:     &Apache::lonnet::correct_line_ends(\$contents);
1.79      www      1086:     if (my $fh=Apache::File->new('>'.$file)) {
                   1087: 	print $fh $contents;
                   1088:         $fh->close();
1.271     www      1089:         return 1;
1.147     albertel 1090:     } else {
1.271     www      1091: 	&warning("Unable to save file $file");
                   1092: 	return 0;
1.79      www      1093:     }
                   1094: }
                   1095: 
1.151     albertel 1096: sub createnewhtml {
                   1097:   my $filecontents=(<<SIMPLECONTENT);
1.78      www      1098: <html>
                   1099: <head>
                   1100: <title>
                   1101:                            Title of Document Goes Here
                   1102: </title>
                   1103: </head>
                   1104: <body bgcolor="#FFFFFF">
                   1105: 
                   1106:                            Body of Document Goes Here
                   1107: 
                   1108: </body>
                   1109: </html>
                   1110: SIMPLECONTENT
1.151     albertel 1111:   return $filecontents;
                   1112: }
                   1113: 
1.274     albertel 1114: sub createnewsty {
                   1115:   my $filecontents=(<<SIMPLECONTENT);
                   1116: <definetag name="">
                   1117:     <render>
                   1118:        <web></web>
                   1119:        <tex></tex>
                   1120:     </render>
                   1121: </definetag>
                   1122: SIMPLECONTENT
                   1123:   return $filecontents;
                   1124: }
                   1125: 
1.147     albertel 1126: 
1.151     albertel 1127: sub inserteditinfo {
1.274     albertel 1128:       my ($result,$filecontents,$filetype)=@_;
1.314     albertel 1129:       $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1.147     albertel 1130: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.274     albertel 1131:       my $xml_help = '';
                   1132:       if ($filetype eq 'html') {
                   1133: 	  $xml_help=Apache::loncommon::helpLatexCheatsheet();
                   1134:       }
                   1135:       my $cleanbut = '';
                   1136:       if ($filetype eq 'html') {
1.280     www      1137: 	  $cleanbut='<input type="submit" name="attemptclean" value="'.
                   1138: 	      &mt('Save and then attempt to clean HTML').'" />';
1.274     albertel 1139:       }
1.254     albertel 1140:       my $titledisplay=&display_title();
1.280     www      1141:       my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
                   1142: 					 'vi' => 'View',
                   1143: 					 'ed' => 'Edit');
1.161     albertel 1144:       my $buttons=(<<BUTTONS);
1.274     albertel 1145: $cleanbut
1.304     matthew  1146: <input type="submit" name="savethisfile" accesskey="s"  value="$lt{'st'}" />
                   1147: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1.161     albertel 1148: BUTTONS
1.78      www      1149:       my $editfooter=(<<ENDFOOTER);
                   1150: <hr />
                   1151: <a name="editsection" />
                   1152: <form method="post">
1.240     albertel 1153: $xml_help
1.280     www      1154: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1.170     www      1155: $buttons<br />
1.78      www      1156: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1.170     www      1157: <br />$buttons
1.78      www      1158: <br />
                   1159: </form>
1.254     albertel 1160: $titledisplay
1.78      www      1161: ENDFOOTER
1.147     albertel 1162: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1163:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1164:       return $result;
                   1165: }
                   1166: 
1.152     albertel 1167: sub get_target {
                   1168:   my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                   1169:   if ( $ENV{'request.state'} eq 'published') {
                   1170:     if ( defined($ENV{'form.grade_target'})
                   1171: 	 && ($viewgrades == 'F' )) {
                   1172:       return ($ENV{'form.grade_target'});
1.153     albertel 1173:     } elsif (defined($ENV{'form.grade_target'})) {
                   1174:       if (($ENV{'form.grade_target'} eq 'web') ||
                   1175: 	  ($ENV{'form.grade_target'} eq 'tex') ) {
                   1176: 	return $ENV{'form.grade_target'}
                   1177:       } else {
                   1178: 	return 'web';
                   1179:       }
1.152     albertel 1180:     } else {
                   1181:       return 'web';
                   1182:     }
                   1183:   } elsif ($ENV{'request.state'} eq 'construct') {
                   1184:     if ( defined($ENV{'form.grade_target'})) {
                   1185:       return ($ENV{'form.grade_target'});
                   1186:     } else {
                   1187:       return 'web';
                   1188:     }
                   1189:   } else {
                   1190:     return 'web';
                   1191:   }
                   1192: }
                   1193: 
1.24      sakharuk 1194: sub handler {
1.255     sakharuk 1195:     my $request=shift;
                   1196:     
                   1197:     my $target=&get_target();
                   1198:     
1.258     albertel 1199:     $Apache::lonxml::debug=$ENV{'user.debug'};
1.255     sakharuk 1200:     
                   1201:     if ($ENV{'browser.mathml'}) {
1.280     www      1202: 	&Apache::loncommon::content_type($request,'text/xml');
1.255     sakharuk 1203:     } else {
1.280     www      1204: 	&Apache::loncommon::content_type($request,'text/html');
1.255     sakharuk 1205:     }
                   1206:     &Apache::loncommon::no_cache($request);
                   1207:     $request->send_http_header;
                   1208:     
                   1209:     return OK if $request->header_only;
1.68      www      1210: 
                   1211: 
1.255     sakharuk 1212:     my $file=&Apache::lonnet::filelocation("",$request->uri);
1.274     albertel 1213:     my $filetype;
                   1214:     if ($file =~ /\.sty$/) {
                   1215: 	$filetype='sty';
                   1216:     } else {
                   1217: 	$filetype='html';
                   1218:     }
1.78      www      1219: #
                   1220: # Edit action? Save file.
                   1221: #
1.255     sakharuk 1222:     unless ($ENV{'request.state'} eq 'published') {
                   1223: 	if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1.271     www      1224: 	    if (&storefile($file,$ENV{'form.filecont'})) {
1.309     albertel 1225: 		&Apache::lonxml::info("<font COLOR=\"#0000FF\">".
                   1226: 				      &mt('Updated').": ".
                   1227: 				      &Apache::lonlocal::locallocaltime(time).
                   1228: 				      " </font>");
1.271     www      1229: 	    } 
1.255     sakharuk 1230: 	}
                   1231:     }
                   1232:     my %mystyle;
                   1233:     my $result = '';
                   1234:     my $filecontents=&Apache::lonnet::getfile($file);
                   1235:     if ($filecontents eq -1) {
1.284     www      1236: 	my $bodytag=&Apache::loncommon::bodytag('File Error');
                   1237: 	my $fnf=&mt('File not found');
1.255     sakharuk 1238: 	$result=(<<ENDNOTFOUND);
1.78      www      1239: <html>
                   1240: <head>
1.284     www      1241: <title>$fnf</title>
1.78      www      1242: </head>
1.284     www      1243: $bodytag
                   1244: <b>$fnf: $file</b>
1.78      www      1245: </body>
                   1246: </html>
                   1247: ENDNOTFOUND
1.50      albertel 1248:     $filecontents='';
1.255     sakharuk 1249: 	if ($ENV{'request.state'} ne 'published') {
1.274     albertel 1250: 	    if ($filetype eq 'sty') {
                   1251: 		$filecontents=&createnewsty();
                   1252: 	    } else {
                   1253: 		$filecontents=&createnewhtml();
                   1254: 	    }
1.255     sakharuk 1255: 	    $ENV{'form.editmode'}='Edit'; #force edit mode
                   1256: 	}
                   1257:     } else {
                   1258: 	unless ($ENV{'request.state'} eq 'published') {
                   1259: 	    if ($ENV{'form.attemptclean'}) {
                   1260: 		$filecontents=&htmlclean($filecontents,1);
                   1261: 	    }
1.264     www      1262: #
                   1263: # we are in construction space, see if edit mode forced
                   1264:             &Apache::loncommon::get_unprocessed_cgi
                   1265:                           ($ENV{'QUERY_STRING'},['editmode']);
1.255     sakharuk 1266: 	}
                   1267: 	if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
                   1268: 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1269: 						'',%mystyle);
                   1270: 	}
1.147     albertel 1271:     }
1.255     sakharuk 1272:     
1.78      www      1273: #
                   1274: # Edit action? Insert editing commands
                   1275: #
1.255     sakharuk 1276:     unless ($ENV{'request.state'} eq 'published') {
                   1277: 	if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
                   1278: 	    my $displayfile=$request->uri;
                   1279: 	    $displayfile=~s/^\/[^\/]*//;
1.309     albertel 1280: 	    $result='<html><body bgcolor="#FFFFFF">'.
                   1281: 		&Apache::lonxml::message_location().'<h3>'.
                   1282: 		$displayfile.
1.255     sakharuk 1283: 		'</h3></body></html>';
1.274     albertel 1284: 	    $result=&inserteditinfo($result,$filecontents,$filetype);
1.255     sakharuk 1285: 	}
1.147     albertel 1286:     }
1.274     albertel 1287:     if ($filetype eq 'html') { writeallows($request->uri); }
                   1288: 	
1.255     sakharuk 1289:     
1.309     albertel 1290:     &Apache::lonxml::add_messages(\$result);
1.255     sakharuk 1291:     $request->print($result);
                   1292:     
                   1293:     return OK;
1.253     albertel 1294: }
                   1295: 
                   1296: sub display_title {
                   1297:     my $result;
                   1298:     if ($ENV{'request.state'} eq 'construct') {
                   1299: 	my $title=&Apache::lonnet::gettitle();
                   1300: 	if (!defined($title) || $title eq '') {
                   1301: 	    $title = $ENV{'request.filename'};
                   1302: 	    $title = substr($title, rindex($title, '/') + 1);
                   1303: 	}
                   1304: 	$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
                   1305:     }
                   1306:     return $result;
1.24      sakharuk 1307: }
1.147     albertel 1308: 
1.22      albertel 1309: sub debug {
1.298     albertel 1310:     if ($Apache::lonxml::debug eq "1") {
                   1311: 	$|=1;
1.300     albertel 1312: 	my $request=$Apache::lonxml::request;
                   1313: 	if (!$request) { $request=Apache->request; }
1.314     albertel 1314: 	$request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1.298     albertel 1315:     }
1.22      albertel 1316: }
1.49      albertel 1317: 
1.22      albertel 1318: sub error {
1.205     www      1319:   $errorcount++;
1.300     albertel 1320:   my $request=$Apache::lonxml::request;
                   1321:   if (!$request) { $request=Apache->request; }
1.74      albertel 1322:   if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1.166     matthew  1323:     # If printing in construction space, put the error inside <pre></pre>
1.309     albertel 1324:       push(@Apache::lonxml::error_messages,
                   1325: 	   $Apache::lonxml::warnings_error_header.
                   1326: 	   "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
1.295     albertel 1327:       $Apache::lonxml::warnings_error_header='';
1.52      albertel 1328:   } else {
1.309     albertel 1329:       push(@Apache::lonxml::error_messages,
                   1330: 	   "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />");
1.52      albertel 1331:     #notify author
1.146     albertel 1332:     &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1.52      albertel 1333:     #notify course
                   1334:     if ( $ENV{'request.course.id'} ) {
1.209     www      1335:       my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1.143     www      1336:       my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1.209     www      1337:       foreach (keys %users) {
                   1338: 	my ($user,$domain) = split(/:/, $_);
1.143     www      1339: 	&Apache::lonmsg::user_normal_msg($user,$domain,
1.146     albertel 1340:         "Error [$declutter]",join('<br />',@_));
1.52      albertel 1341:       }
                   1342:     }
                   1343:   }
1.22      albertel 1344: }
1.49      albertel 1345: 
1.22      albertel 1346: sub warning {
1.295     albertel 1347:     $warningcount++;
1.261     albertel 1348:   
1.295     albertel 1349:     if ($ENV{'form.grade_target'} ne 'tex') {
                   1350: 	if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
1.300     albertel 1351: 	    my $request=$Apache::lonxml::request;
                   1352: 	    if (!$request) { $request=Apache->request; }
1.309     albertel 1353: 	    push(@Apache::lonxml::warning_messages,
                   1354: 		 $Apache::lonxml::warnings_error_header.
                   1355: 		 "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1.295     albertel 1356: 	    $Apache::lonxml::warnings_error_header='';
                   1357: 	}
                   1358:     }
1.309     albertel 1359: }
                   1360: 
                   1361: sub info {
                   1362:     if ($ENV{'form.grade_target'} ne 'tex' 
                   1363: 	&& $ENV{'request.state'} eq 'construct') {
                   1364: 	push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
                   1365:     }
                   1366: }
                   1367: 
                   1368: sub message_location {
                   1369:     return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
                   1370: }
                   1371: 
                   1372: sub add_messages {
                   1373:     my ($msg)=@_;
                   1374:     my $result=join(' ',
                   1375: 		    @Apache::lonxml::info_messages,
                   1376: 		    @Apache::lonxml::error_messages,
                   1377: 		    @Apache::lonxml::warning_messages);
                   1378:     undef(@Apache::lonxml::info_messages);
                   1379:     undef(@Apache::lonxml::error_messages);
                   1380:     undef(@Apache::lonxml::warning_messages);
                   1381:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
                   1382:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1.83      albertel 1383: }
                   1384: 
                   1385: sub get_param {
1.213     albertel 1386:     my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
                   1387:     if ( ! $context ) { $context = -1; }
                   1388:     my $args ='';
                   1389:     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1390:     if ( ! $Apache::lonxml::usestyle ) {
                   1391: 	$args=$Apache::lonxml::style_values.$args;
                   1392:     }
1.213     albertel 1393:     if ( ! $args ) { return undef; }
                   1394:     if ( $case_insensitive ) {
                   1395: 	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
                   1396: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1397:                                      $safeeval); #'
                   1398: 	} else {
                   1399: 	    return undef;
                   1400: 	}
                   1401:     } else {
                   1402: 	if ( $args =~ /my \$\Q$param\E=\"/ ) {
                   1403: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1404:                                      $safeeval); #'
                   1405: 	} else {
                   1406: 	    return undef;
                   1407: 	}
                   1408:     }
1.22      albertel 1409: }
                   1410: 
1.132     albertel 1411: sub get_param_var {
1.213     albertel 1412:   my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1.132     albertel 1413:   if ( ! $context ) { $context = -1; }
                   1414:   my $args ='';
                   1415:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1416:   if ( ! $Apache::lonxml::usestyle ) {
                   1417:       $args=$Apache::lonxml::style_values.$args;
                   1418:   }
1.230     albertel 1419:   &Apache::lonxml::debug("Args are $args param is $param");
1.213     albertel 1420:   if ($case_insensitive) {
                   1421:       if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
                   1422: 	  return undef;
                   1423:       }
                   1424:   } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1.132     albertel 1425:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.230     albertel 1426:   &Apache::lonxml::debug("first run is $value");
                   1427:   if ($value =~ /^[\$\@\%]\w+$/) {
                   1428:       &Apache::lonxml::debug("doing second");
                   1429:       my @result=&Apache::run::run("return $value",$safeeval,1);
                   1430:       if (!defined($result[0])) {
                   1431: 	  return $value
                   1432:       } else {
                   1433: 	  if (wantarray) { return @result; } else { return $result[0]; }
                   1434:       }
1.132     albertel 1435:   } else {
                   1436:     return $value;
                   1437:   }
                   1438: }
                   1439: 
1.74      albertel 1440: sub register_insert {
1.75      albertel 1441:   my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74      albertel 1442:   my $i;
1.76      albertel 1443:   my $tagnum=0;
1.74      albertel 1444:   my @order;
                   1445:   for ($i=0;$i < $#data; $i++) {
                   1446:     my $line = $data[$i];
                   1447:     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
                   1448:     if ( $line =~ /TABLE/ ) { last; }
1.268     bowersj2 1449:     my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1.135     albertel 1450:     if ($tag) {
                   1451:       $insertlist{"$tagnum.tag"} = $tag;
                   1452:       $insertlist{"$tagnum.description"} = $descrip;
                   1453:       $insertlist{"$tagnum.color"} = $color;
                   1454:       $insertlist{"$tagnum.function"} = $function;
                   1455:       if (!defined($show)) { $show='yes'; }
                   1456:       $insertlist{"$tagnum.show"}= $show;
1.268     bowersj2 1457:       $insertlist{"$tagnum.helpfile"} = $helpfile;
                   1458:       $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1.135     albertel 1459:       $insertlist{"$tag.num"}=$tagnum;
                   1460:       $tagnum++;
                   1461:     }
1.74      albertel 1462:   }
1.76      albertel 1463:   $i++; #skipping TABLE line
                   1464:   $tagnum = 0;
1.74      albertel 1465:   for (;$i < $#data;$i++) {
                   1466:     my $line = $data[$i];
1.76      albertel 1467:     my ($mnemonic,@which) = split(/ +/,$line);
                   1468:     my $tag = $insertlist{"$tagnum.tag"};
1.144     matthew  1469:     for (my $j=0;$j <=$#which;$j++) {
1.74      albertel 1470:       if ( $which[$j] eq 'Y' ) {
1.76      albertel 1471: 	if ($insertlist{"$j.show"} ne 'no') {
                   1472: 	  push(@{ $insertlist{"$tag.which"} },$j);
                   1473: 	}
1.74      albertel 1474:       }
                   1475:     }
1.76      albertel 1476:     $tagnum++;
1.74      albertel 1477:   }
                   1478: }
1.98      albertel 1479: 
                   1480: sub description {
                   1481:   my ($token)=@_;
1.138     albertel 1482:   my $tagnum;
                   1483:   my $tag=$token->[1];
                   1484:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1485:     my $testtag=$namespace.'::'.$tag;
                   1486:     $tagnum=$insertlist{"$testtag.num"};
                   1487:     if (defined($tagnum)) { last; }
                   1488:   }
                   1489:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1490:   return $insertlist{$tagnum.'.description'};
1.268     bowersj2 1491: }
                   1492: 
                   1493: # Returns a list containing the help file, and the description
                   1494: sub helpinfo {
                   1495:   my ($token)=@_;
                   1496:   my $tagnum;
                   1497:   my $tag=$token->[1];
                   1498:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1499:     my $testtag=$namespace.'::'.$tag;
                   1500:     $tagnum=$insertlist{"$testtag.num"};
                   1501:     if (defined($tagnum)) { last; }
                   1502:   }
                   1503:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1504:   return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1.98      albertel 1505: }
1.123     albertel 1506: 
                   1507: # ----------------------------------------------------------------- whichuser
                   1508: # returns a list of $symb, $courseid, $domain, $name that is correct for
                   1509: # calls to lonnet functions for this setup.
                   1510: # - looks for form.grade_ parameters
                   1511: sub whichuser {
1.262     matthew  1512:   my ($passedsymb)=@_;
1.245     albertel 1513:   my ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1514:   if (defined($ENV{'form.grade_symb'})) {
                   1515:     my $tmp_courseid=$ENV{'form.grade_courseid'};
1.269     albertel 1516:     my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1.123     albertel 1517:     if ($allowed) {
                   1518:       $symb=$ENV{'form.grade_symb'};
                   1519:       $courseid=$ENV{'form.grade_courseid'};
                   1520:       $domain=$ENV{'form.grade_domain'};
                   1521:       $name=$ENV{'form.grade_username'};
                   1522:     }
1.134     albertel 1523:   } else {
1.262     matthew  1524:       if (!$passedsymb) {
                   1525:           $symb=&Apache::lonnet::symbread();
                   1526:       } else {
                   1527:           $symb=$passedsymb;
                   1528:       }
1.244     albertel 1529:       $courseid=$ENV{'request.course.id'};
                   1530:       $domain=$ENV{'user.domain'};
                   1531:       $name=$ENV{'user.name'};
                   1532:       if ($name eq 'public' && $domain eq 'public') {
                   1533: 	  if (!defined($ENV{'form.username'})) {
                   1534: 	      $ENV{'form.username'}.=time.rand(10000000);
                   1535: 	  }
                   1536: 	  $name.=$ENV{'form.username'};
                   1537:       }
1.123     albertel 1538:   }
1.245     albertel 1539:   return ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1540: }
                   1541: 
1.1       sakharuk 1542: 1;
                   1543: __END__
1.68      www      1544: 
                   1545: 

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