Annotation of loncom/xml/lonxml.pm, revision 1.295

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.295   ! albertel    4: # $Id: lonxml.pm,v 1.294 2003/11/21 18:54:10 albertel Exp $
1.139     www         5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
                     28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
                     29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
                     30: # binary executable programs or libraries distributed by the 
                     31: # Michigan State University (the "Licensee"), but any binaries so 
                     32: # distributed are hereby licensed only for use in the context
                     33: # of a program or computational system for which the Licensee is the 
                     34: # primary author or distributor, and which performs substantial 
                     35: # additional tasks beyond the translation of (La)TeX into HTML.
                     36: # The C source of the Code may not be distributed by the Licensee
                     37: # to any other parties under any circumstances.
                     38: #
1.3       sakharuk   39: # last modified 06/26/00 by Alexander Sakharuk
1.33      www        40: # 11/6 Gerd Kortemeyer
1.45      www        41: # 6/1/1 Gerd Kortemeyer
1.56      albertel   42: # 2/21,3/13 Guy
1.68      www        43: # 3/29,5/4 Gerd Kortemeyer
1.78      www        44: # 5/26 Gerd Kortemeyer
1.80      harris41   45: # 5/27 H. K. Ng
1.89      www        46: # 6/2,6/3,6/8,6/9 Gerd Kortemeyer
1.93      ng         47: # 6/12,6/13 H. K. Ng
1.95      www        48: # 6/16 Gerd Kortemeyer
1.104     ng         49: # 7/27 H. K. Ng
1.127     www        50: # 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
1.130     www        51: # Guy Albertelli
                     52: # 9/26 Gerd Kortemeyer
1.143     www        53: # Dec Guy Albertelli
                     54: # YEAR=2002
                     55: # 1/1 Gerd Kortemeyer
1.145     www        56: # 1/2 Matthew Hall
                     57: # 1/3 Gerd Kortemeyer
1.143     www        58: #
1.2       sakharuk   59: 
1.4       albertel   60: package Apache::lonxml; 
1.33      www        61: use vars 
1.205     www        62: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode $errorcount $warningcount);
1.1       sakharuk   63: use strict;
1.167     albertel   64: use HTML::LCParser();
1.161     albertel   65: use HTML::TreeBuilder();
                     66: use HTML::Entities();
                     67: use Safe();
                     68: use Safe::Hole();
                     69: use Math::Cephes();
                     70: use Math::Random();
                     71: use Opcode();
1.271     www        72: use POSIX qw(strftime);
1.72      albertel   73: 
1.266     bowersj2   74: 
1.72      albertel   75: sub register {
1.141     albertel   76:   my ($space,@taglist) = @_;
                     77:   foreach my $temptag (@taglist) {
                     78:     push(@{ $Apache::lonxml::alltags{$temptag} },$space);
1.72      albertel   79:   }
                     80: }
                     81: 
1.141     albertel   82: sub deregister {
                     83:   my ($space,@taglist) = @_;
                     84:   foreach my $temptag (@taglist) {
                     85:     my $tempspace = $Apache::lonxml::alltags{$temptag}[-1];
                     86:     if ($tempspace eq $space) {
                     87:       pop(@{ $Apache::lonxml::alltags{$temptag} });
                     88:     }
                     89:   }
1.142     albertel   90:   #&printalltags();
1.141     albertel   91: }
                     92: 
1.46      www        93: use Apache::Constants qw(:common);
1.161     albertel   94: use Apache::lontexconvert();
                     95: use Apache::style();
                     96: use Apache::run();
                     97: use Apache::londefdef();
                     98: use Apache::scripttag();
1.285     www        99: use Apache::languagetags();
1.161     albertel  100: use Apache::edit();
1.266     bowersj2  101: use Apache::inputtags();
                    102: use Apache::outputtags();
1.161     albertel  103: use Apache::lonnet();
                    104: use Apache::File();
                    105: use Apache::loncommon();
1.198     www       106: use Apache::lonfeedback();
1.200     www       107: use Apache::lonmsg();
1.217     matthew   108: use Apache::loncacc();
1.280     www       109: use Apache::lonlocal;
1.79      www       110: 
1.72      albertel  111: #==================================================   Main subroutine: xmlparse  
                    112: #debugging control, to turn on debugging modify the correct handler
                    113: $Apache::lonxml::debug=0;
1.206     albertel  114: 
                    115: # keeps count of the number of warnings and errors generated in a parse
                    116: $warningcount=0;
                    117: $errorcount=0;
1.72      albertel  118: 
                    119: #path to the directory containing the file currently being processed
                    120: @pwd=();
                    121: 
                    122: #these two are used for capturing a subset of the output for later processing,
                    123: #don't touch them directly use &startredirection and &endredirection
                    124: @outputstack = ();
                    125: $redirection = 0;
                    126: 
                    127: #controls wheter the <import> tag actually does
                    128: $import = 1;
                    129: @extlinks=();
                    130: 
                    131: # meta mode is a bit weird only some output is to be turned off
                    132: #<output> tag turns metamode off (defined in londefdef.pm)
                    133: $metamode = 0;
                    134: 
                    135: # turns on and of run::evaluate actually derefencing var refs
                    136: $evaluate = 1;
1.7       albertel  137: 
1.74      albertel  138: # data structure for eidt mode, determines what tags can go into what other tags
                    139: %insertlist=();
1.68      www       140: 
1.99      albertel  141: # stores the list of active tag namespaces
1.76      albertel  142: @namespace=();
                    143: 
1.169     albertel  144: # if 0 all high ASCII characters will be encoded into HTML Entities
                    145: $prevent_entity_encode=0;
                    146: 
1.99      albertel  147: # has the dynamic menu been updated to know about this resource
                    148: $Apache::lonxml::registered=0;
                    149: 
1.172     albertel  150: # a pointer the the Apache request object
                    151: $Apache::lonxml::request='';
                    152: 
1.216     sakharuk  153: # a problem number counter, and check on ether it is used
1.237     sakharuk  154: $Apache::lonxml::counter=1;
1.204     albertel  155: $Apache::lonxml::counter_changed=0;
                    156: 
1.212     albertel  157: #internal check on whether to look at style defs
                    158: $Apache::lonxml::usestyle=1;
1.260     albertel  159: 
                    160: #locations used to store the parameter string for style substitutions
                    161: $Apache::lonxml::style_values='';
                    162: $Apache::lonxml::style_end_values='';
1.212     albertel  163: 
1.281     albertel  164: #array of ssi calls that need to occur after we are done parsing
                    165: @Apache::lonxml::ssi_info=();
                    166: 
1.282     albertel  167: #should we do the postag variable interpolation
                    168: $Apache::lonxml::post_evaluate=1;
                    169: 
1.295   ! albertel  170: #a header message to emit in the case of any generated warning or errors
        !           171: $Apache::lonxml::warnings_error_header='';
        !           172: 
1.68      www       173: sub xmlbegin {
                    174:   my $output='';
                    175:   if ($ENV{'browser.mathml'}) {
                    176:       $output='<?xml version="1.0"?>'
                    177:             .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
                    178:             .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
                    179:             .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
                    180:             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
                    181: 		.'xmlns="http://www.w3.org/TR/REC-html40">';
                    182:   } else {
                    183:       $output='<html>';
                    184:   }
                    185:   return $output;
                    186: }
                    187: 
                    188: sub xmlend {
1.278     www       189:     my $mode='xml';
                    190:     my $status='OPEN';
                    191:     if ($Apache::lonhomework::parsing_a_problem) {
                    192: 	$mode='problem';
                    193: 	$status=$Apache::inputtags::status[-1]; 
                    194:     }
1.277     www       195:     return &Apache::lonfeedback::list_discussion().'</html>';
1.119     www       196: }
                    197: 
                    198: sub tokeninputfield {
1.120     www       199:     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
                    200:     $defhost=~tr/a-z/A-Z/;
1.119     www       201:     return (<<ENDINPUTFIELD)
1.226     albertel  202: <script type="text/javascript">
1.120     www       203:     function updatetoken() {
                    204: 	var comp=new Array;
                    205:         var barcode=unescape(document.tokeninput.barcode.value);
                    206:         comp=barcode.split('*');
                    207:         if (typeof(comp[0])!="undefined") {
                    208: 	    document.tokeninput.codeone.value=comp[0];
                    209: 	}
                    210:         if (typeof(comp[1])!="undefined") {
                    211: 	    document.tokeninput.codetwo.value=comp[1];
                    212: 	}
                    213:         if (typeof(comp[2])!="undefined") {
                    214:             comp[2]=comp[2].toUpperCase();
                    215: 	    document.tokeninput.codethree.value=comp[2];
                    216: 	}
                    217:         document.tokeninput.barcode.value='';
                    218:     }  
                    219: </script>
                    220: <form method="post" name="tokeninput">
1.119     www       221: <table border="2" bgcolor="#FFFFBB">
                    222: <tr><th>DocID Checkin</th></tr>
                    223: <tr><td>
                    224: <table>
                    225: <tr>
                    226: <td>Scan in Barcode</td>
1.120     www       227: <td><input type="text" size="22" name="barcode" 
                    228: onChange="updatetoken()"/></td>
1.119     www       229: </tr>
                    230: <tr><td><i>or</i> Type in DocID</td>
                    231: <td>
                    232: <input type="text" size="5" name="codeone" />
1.120     www       233: <b><font size="+2">*</font></b>
1.119     www       234: <input type="text" size="5" name="codetwo" />
1.120     www       235: <b><font size="+2">*</font></b>
                    236: <input type="text" size="10" name="codethree" value="$defhost" 
                    237: onChange="this.value=this.value.toUpperCase()" />
1.119     www       238: </td></tr>
                    239: </table>
                    240: </td></tr>
                    241: <tr><td><input type="submit" value="Check in DocID" /></td></tr>
                    242: </table>
                    243: </form>
                    244: ENDINPUTFIELD
1.112     www       245: }
                    246: 
1.116     www       247: sub maketoken {
1.118     www       248:     my ($symb,$tuname,$tudom,$tcrsid)=@_;
1.112     www       249:     unless ($symb) {
                    250: 	$symb=&Apache::lonnet::symbread();
                    251:     }
                    252:     unless ($tuname) {
                    253: 	$tuname=$ENV{'user.name'};
                    254:         $tudom=$ENV{'user.domain'};
                    255:         $tcrsid=$ENV{'request.course.id'};
                    256:     }
1.116     www       257: 
1.118     www       258:     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
                    259: }
                    260: 
                    261: sub printtokenheader {
1.133     albertel  262:     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
1.116     www       263:     unless ($token) { return ''; }
1.118     www       264: 
1.133     albertel  265:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    266:     unless ($tsymb) {
                    267: 	$tsymb=$symb;
1.118     www       268:     }
                    269:     unless ($tuname) {
1.133     albertel  270: 	$tuname=$name;
                    271:         $tudom=$domain;
                    272:         $tcrsid=$courseid;
1.118     www       273:     }
1.114     www       274: 
                    275:     my %reply=&Apache::lonnet::get('environment',
                    276:               ['firstname','middlename','lastname','generation'],
                    277:               $tudom,$tuname);
                    278:     my $plainname=$reply{'firstname'}.' '. 
                    279:                   $reply{'middlename'}.' '.
                    280:                   $reply{'lastname'}.' '.
                    281: 		  $reply{'generation'};
                    282: 
1.112     www       283:     if ($target eq 'web') {
1.145     www       284:         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
1.115     www       285: 	return 
1.221     albertel  286:  '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
1.284     www       287:                &mt('Checked out for').' '.$plainname.
                    288:                '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
                    289: 	       '<br />'.&mt('ID').': '.$idhash{$tuname}.
                    290: 	       '<br />'.&mt('CourseID').': '.$tcrsid.
                    291: 	       '<br />'.&mt('Course').': '.$ENV{'course.'.$tcrsid.'.description'}.
                    292:                '<br />'.&mt('DocID').': '.$token.
                    293:                '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
1.112     www       294:     } else {
1.121     albertel  295:         return $token;
1.112     www       296:     }
1.68      www       297: }
                    298: 
1.70      www       299: sub fontsettings() {
                    300:     my $headerstring='';
                    301:     if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 
1.248     albertel  302: 	$headerstring.=
                    303: 	    '<meta Content-Type="text/html; charset=x-mac-roman">';
1.263     albertel  304:     } elsif (!$ENV{'browser.mathml'} && $ENV{'browser.unicode'}) {
1.248     albertel  305: 	$headerstring.=
                    306: 	    '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
1.70      www       307:     }
                    308:     return $headerstring;
1.68      www       309: }
                    310: 
1.48      albertel  311: sub printalltags {
                    312:   my $temp;
                    313:   foreach $temp (sort keys %Apache::lonxml::alltags) {
1.141     albertel  314:     &Apache::lonxml::debug("$temp -- ".
                    315: 		  join(',',@{ $Apache::lonxml::alltags{$temp} }));
1.48      albertel  316:   }
                    317: }
1.31      sakharuk  318: 
1.3       sakharuk  319: sub xmlparse {
1.172     albertel  320:  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
1.96      albertel  321: 
1.172     albertel  322:  &setup_globals($request,$target);
1.232     albertel  323:  &Apache::inputtags::initialize_inputtags();
                    324:  &Apache::outputtags::initialize_outputtags();
                    325:  &Apache::edit::initialize_edit();
1.287     albertel  326:  &Apache::londefdef::initialize_londefdef();
1.244     albertel  327: 
1.178     www       328: #
                    329: # do we have a course style file?
                    330: #
                    331: 
1.208     albertel  332:  if ($ENV{'request.course.id'} && $ENV{'request.state'} ne 'construct') {
1.178     www       333:      my $bodytext=
                    334: 	 $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
                    335:      if ($bodytext) {
                    336:        my $location=&Apache::lonnet::filelocation('',$bodytext);
                    337:        my $styletext=&Apache::lonnet::getfile($location);
                    338:        if ($styletext ne '-1') {
                    339:           %style_for_target = (%style_for_target,
                    340:                           &Apache::style::styleparser($target,$styletext));
                    341:        }
                    342:     }
1.292     sakharuk  343:  } elsif ($ENV{'construct.style'} && ($ENV{'request.state'} eq 'construct')) {
                    344:      my $location=&Apache::lonnet::filelocation('',$ENV{'construct.style'});
1.291     sakharuk  345:      my $styletext=&Apache::lonnet::getfile($location);
                    346:        if ($styletext ne '-1') {
                    347:           %style_for_target = (%style_for_target,
                    348:                           &Apache::style::styleparser($target,$styletext));
                    349:       }
1.178     www       350:  }
1.255     sakharuk  351: #&printalltags();
1.16      albertel  352:  my @pars = ();
1.23      albertel  353:  my $pwd=$ENV{'request.filename'};
                    354:  $pwd =~ s:/[^/]*$::;
                    355:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  356: 
1.3       sakharuk  357:  my $safeeval = new Safe;
1.40      albertel  358:  my $safehole = new Safe::Hole;
1.82      ng        359:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  360: #-------------------- Redefinition of the target in the case of compound target
                    361: 
                    362:  ($target, my @tenta) = split('&&',$target);
                    363: 
1.150     albertel  364:  my @stack = ();
1.3       sakharuk  365:  my @parstack = ();
1.17      albertel  366:  &initdepth;
1.67      www       367: 
1.101     albertel  368:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
                    369: 				   $safeeval,\%style_for_target);
1.255     sakharuk  370: 
1.125     www       371:  if ($ENV{'request.uri'}) {
                    372:     &writeallows($ENV{'request.uri'});
                    373:  }
1.281     albertel  374:  &do_registered_ssi();
1.204     albertel  375:  if ($Apache::lonxml::counter_changed) { &store_counter() }
1.3       sakharuk  376:  return $finaloutput;
1.106     www       377: }
                    378: 
                    379: sub htmlclean {
1.107     www       380:     my ($raw,$full)=@_;
1.106     www       381: 
                    382:     my $tree = HTML::TreeBuilder->new;
                    383:     $tree->ignore_unknown(0);
1.140     albertel  384: 
1.106     www       385:     $tree->parse($raw);
                    386: 
1.107     www       387:     my $output= $tree->as_HTML(undef,' ');
1.140     albertel  388: 
1.161     albertel  389:     $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
1.111     www       390:     $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
1.107     www       391:     unless ($full) {
                    392:        $output=~s/\<[\/]*(body|head|html)\>//gis;
                    393:     }
1.106     www       394: 
                    395:     $tree = $tree->delete;
                    396: 
                    397:     return $output;
1.15      albertel  398: }
                    399: 
1.191     albertel  400: sub latex_special_symbols {
1.272     albertel  401:     my ($string,$where)=@_;
1.235     sakharuk  402:     if ($where eq 'header') {
1.272     albertel  403: 	$string =~ s/(\\|_|\^)/ /g;
                    404: 	$string =~ s/(\$|%|\#|&|\{|\})/\\$1/g;
1.273     sakharuk  405: 	$string =~ s/_/ /g;
1.229     sakharuk  406:     } else {
1.272     albertel  407: 	$string=~s/\\ /\\char92 /g;
1.288     sakharuk  408: 	$string=~s/\^/\\\^ /g;
1.272     albertel  409: 	$string=~s/\~/\\char126 /g;
1.294     albertel  410: 	#fixup & if it doesn't look like
                    411:         # &#123; or &alpha;
                    412: 	$string=~s/(&(?!((\#[0-9]+)|([a-z]+));))/\\$1/gi;
1.272     albertel  413: 	$string=~s/([^&])\#/$1\\#/g;
                    414: 	$string=~s/(\$|_|{|})/\\$1/g;
                    415: 	$string=~s/\\char92 /\\texttt{\\char92}/g;
                    416: 	$string=~s/(>|<)/\$$1\$/g; #more or less
                    417: 	if ($string=~m/\d%/) {$string =~ s/(\d)%/$1\\%/g;} #percent after digit
                    418: 	if ($string=~m/\s%/) {$string =~ s/(\s)%/$1\\%/g;} #percent after space
                    419: 	if ($string eq '%.') {$string = '\%.';} #percent at the end of statement
1.229     sakharuk  420:     }
1.272     albertel  421:     return $string;
1.188     sakharuk  422: }
                    423: 
1.101     albertel  424: sub inner_xmlparse {
                    425:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
                    426:   my $finaloutput = '';
                    427:   my $result;
                    428:   my $token;
1.258     albertel  429:   my $dontpop=0;
1.101     albertel  430:   while ( $#$pars > -1 ) {
                    431:     while ($token = $$pars['-1']->get_token) {
1.261     albertel  432:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
1.101     albertel  433: 	if ($metamode<1) {
1.190     albertel  434: 	    my $text=$token->[1];
1.193     albertel  435: 	    if ($token->[0] eq 'C' && $target eq 'tex') {
1.239     sakharuk  436: 		$text = '';
                    437: #		$text = '%'.$text."\n";
1.182     sakharuk  438: 	    }
1.190     albertel  439: 	    $result.=$text;
1.101     albertel  440: 	}
1.261     albertel  441:       } elsif (($token->[0] eq 'D')) {
                    442: 	if ($metamode<1 && $target eq 'web') {
                    443: 	    my $text=$token->[1];
                    444: 	    $result.=$text;
                    445: 	}
1.101     albertel  446:       } elsif ($token->[0] eq 'PI') {
1.261     albertel  447: 	if ($metamode<1 && $target eq 'web') {
1.101     albertel  448: 	  $result=$token->[2];
                    449: 	}
                    450:       } elsif ($token->[0] eq 'S') {
1.140     albertel  451: 	# add tag to stack
1.101     albertel  452: 	push (@$stack,$token->[1]);
                    453: 	# add parameters list to another stack
                    454: 	push (@$parstack,&parstring($token));
1.140     albertel  455: 	&increasedepth($token);
1.212     albertel  456: 	if ($Apache::lonxml::usestyle &&
                    457: 	    exists($$style_for_target{$token->[1]})) {
                    458: 	    $Apache::lonxml::usestyle=0;
                    459: 	    my $string=$$style_for_target{$token->[1]}.
                    460: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    461: 	    &Apache::lonxml::newparser($pars,\$string);
1.257     albertel  462: 	    $Apache::lonxml::style_values=$$parstack[-1];
1.259     albertel  463: 	    $Apache::lonxml::style_end_values=$$parstack[-1];
1.101     albertel  464: 	} else {
                    465: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    466: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  467: 	}
1.101     albertel  468:       } elsif ($token->[0] eq 'E') {
1.212     albertel  469: 	if ($Apache::lonxml::usestyle &&
                    470: 	    exists($$style_for_target{'/'."$token->[1]"})) {
                    471: 	    $Apache::lonxml::usestyle=0;
                    472: 	    my $string=$$style_for_target{'/'.$token->[1]}.
1.258     albertel  473: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
1.212     albertel  474: 	    &Apache::lonxml::newparser($pars,\$string);
1.259     albertel  475: 	    $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
                    476: 	    $Apache::lonxml::style_end_values='';
1.258     albertel  477: 	    $dontpop=1;
1.101     albertel  478: 	} else {
1.258     albertel  479: 	    #clear out any tags that didn't end
                    480: 	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
                    481: 		my $lasttag=$$stack[-1];
                    482: 		if ($token->[1] =~ /^$lasttag$/i) {
                    483: 		    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' as end tag to &lt;'.$$stack[-1].'&gt;');
                    484: 		    last;
                    485: 		} else {
                    486: 		    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' when looking for &lt;/'.$$stack[-1].'&gt; in file');
                    487: 		    &end_tag($stack,$parstack,$token);
                    488: 		}
                    489: 	    }
                    490: 	    $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    491: 			       $parstack, $pars,$safeeval, $style_for_target);
1.101     albertel  492: 	}
                    493:       } else {
                    494: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    495:       }
                    496:       #evaluate variable refs in result
1.282     albertel  497:       if ($Apache::lonxml::post_evaluate &&$result ne "") {
1.257     albertel  498: 	  my $extras;
                    499: 	  if (!$Apache::lonxml::usestyle) {
                    500: 	      $extras=$Apache::lonxml::style_values;
                    501: 	  }
1.101     albertel  502: 	if ( $#$parstack > -1 ) {
1.257     albertel  503: 	  $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
1.101     albertel  504: 	} else {
1.257     albertel  505: 	  $result= &Apache::run::evaluate($result,$safeeval,$extras);
1.101     albertel  506: 	}
1.163     albertel  507:       }
1.282     albertel  508:       $Apache::lonxml::post_evaluate=1;
                    509: 
1.190     albertel  510:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.249     albertel  511: 	  #Style file definitions should be correct
1.250     albertel  512: 	  if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
1.272     albertel  513: 	      $result=&latex_special_symbols($result);
1.249     albertel  514: 	  }
1.190     albertel  515:       }
                    516: 
1.169     albertel  517:       # Encode any high ASCII characters
1.279     albertel  518: #      if (!$Apache::lonxml::prevent_entity_encode) {
                    519: #	$result=&HTML::Entities::encode($result,"\200-\377");
                    520: #      }
1.169     albertel  521:       if ($Apache::lonxml::redirection) {
                    522: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    523:       } else {
                    524: 	$finaloutput.=$result;
                    525:       }
                    526:       $result = '';
                    527: 
1.258     albertel  528:       if ($token->[0] eq 'E' && !$dontpop) {
1.101     albertel  529: 	&end_tag($stack,$parstack,$token);
                    530:       }
1.258     albertel  531:       $dontpop=0;
1.224     albertel  532:     }	
1.212     albertel  533:     if ($#$pars > -1) {
                    534: 	pop @$pars;
                    535: 	pop @Apache::lonxml::pwd;
                    536:     }
1.101     albertel  537:   }
                    538: 
                    539:   # if ($target eq 'meta') {
                    540:   #   $finaloutput.=&endredirection;
                    541:   # }
                    542: 
1.169     albertel  543: 
1.101     albertel  544:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    545:     $finaloutput=&afterburn($finaloutput);
1.216     sakharuk  546:   }	    
1.101     albertel  547:   return $finaloutput;
                    548: }
1.67      www       549: 
1.7       albertel  550: sub callsub {
1.84      albertel  551:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  552:   my $currentstring='';
1.72      albertel  553:   my $nodefault;
1.7       albertel  554:   {
1.59      albertel  555:     my $sub1;
1.7       albertel  556:     no strict 'refs';
1.68      www       557:     my $tag=$token->[1];
1.236     www       558: # get utterly rid of extended html tags
                    559:     if ($tag=~/^x\-/i) { return ''; }
1.141     albertel  560:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       561:     if (!$space) {
1.141     albertel  562:      	$tag=~tr/A-Z/a-z/;
1.68      www       563: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  564: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       565:     }
1.97      albertel  566: 
                    567:     my $deleted=0;
                    568:     $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
                    569:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    570:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    571: 					     $parstack,$parser,$safeeval,
                    572: 					     $style);
                    573:     }
                    574:     if (!$deleted) {
                    575:       if ($space) {
1.220     albertel  576: 	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  577: 	$sub1="$space\:\:$sub";
                    578: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    579: 					     $parstack,$parser,$safeeval,
                    580: 					     $style);
                    581:       } else {
1.220     albertel  582: 	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
1.97      albertel  583: 	if ($metamode <1) {
                    584: 	  if (defined($token->[4]) && ($metamode < 1)) {
                    585: 	    $currentstring = $token->[4];
                    586: 	  } else {
                    587: 	    $currentstring = $token->[2];
                    588: 	  }
1.62      sakharuk  589: 	}
1.7       albertel  590:       }
1.97      albertel  591:       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
                    592:       if ($currentstring eq '' && $nodefault eq '') {
                    593: 	if ($target eq 'edit') {
1.220     albertel  594: 	  #&Apache::lonxml::debug("doing default edit for $token->[1]");
1.97      albertel  595: 	  if ($token->[0] eq 'S') {
                    596: 	    $currentstring = &Apache::edit::tag_start($target,$token);
                    597: 	  } elsif ($token->[0] eq 'E') {
                    598: 	    $currentstring = &Apache::edit::tag_end($target,$token);
                    599: 	  }
                    600: 	} elsif ($target eq 'modified') {
                    601: 	  if ($token->[0] eq 'S') {
                    602: 	    $currentstring = $token->[4];
                    603: 	    $currentstring.=&Apache::edit::handle_insert();
1.210     www       604: 	  } elsif ($token->[0] eq 'E') {
                    605: 	    $currentstring = $token->[2];
                    606:             $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
1.97      albertel  607: 	  } else {
                    608: 	    $currentstring = $token->[2];
                    609: 	  }
1.72      albertel  610: 	}
                    611:       }
1.7       albertel  612:     }
                    613:     use strict 'refs';
                    614:   }
                    615:   return $currentstring;
1.82      ng        616: }
                    617: 
1.96      albertel  618: sub setup_globals {
1.172     albertel  619:   my ($request,$target)=@_;
                    620:   $Apache::lonxml::request=$request;
1.99      albertel  621:   $Apache::lonxml::registered = 0;
1.205     www       622:   $errorcount=0;
                    623:   $warningcount=0;
1.207     albertel  624:   $Apache::lonxml::default_homework_loaded=0;
1.212     albertel  625:   $Apache::lonxml::usestyle=1;
1.204     albertel  626:   &init_counter();
1.101     albertel  627:   @Apache::lonxml::pwd=();
1.124     albertel  628:   @Apache::lonxml::extlinks=();
1.281     albertel  629:   @Apache::lonxml::ssi_info=();
1.282     albertel  630:   $Apache::lonxml::post_evaluate=1;
1.295   ! albertel  631:   $Apache::lonxml::warnings_error_header='';
1.96      albertel  632:   if ($target eq 'meta') {
                    633:     $Apache::lonxml::redirection = 0;
                    634:     $Apache::lonxml::metamode = 1;
                    635:     $Apache::lonxml::evaluate = 1;
                    636:     $Apache::lonxml::import = 0;
1.129     albertel  637:   } elsif ($target eq 'answer') {
                    638:     $Apache::lonxml::redirection = 0;
                    639:     $Apache::lonxml::metamode = 1;
                    640:     $Apache::lonxml::evaluate = 1;
                    641:     $Apache::lonxml::import = 1;
1.96      albertel  642:   } elsif ($target eq 'grade') {
                    643:     &startredirection;
                    644:     $Apache::lonxml::metamode = 0;
                    645:     $Apache::lonxml::evaluate = 1;
                    646:     $Apache::lonxml::import = 1;
                    647:   } elsif ($target eq 'modified') {
                    648:     $Apache::lonxml::redirection = 0;
                    649:     $Apache::lonxml::metamode = 0;
                    650:     $Apache::lonxml::evaluate = 0;
                    651:     $Apache::lonxml::import = 0;
                    652:   } elsif ($target eq 'edit') {
                    653:     $Apache::lonxml::redirection = 0;
                    654:     $Apache::lonxml::metamode = 0;
                    655:     $Apache::lonxml::evaluate = 0;
                    656:     $Apache::lonxml::import = 0;
1.163     albertel  657:   } elsif ($target eq 'analyze') {
                    658:     $Apache::lonxml::redirection = 0;
                    659:     $Apache::lonxml::metamode = 0;
                    660:     $Apache::lonxml::evaluate = 1;
                    661:     $Apache::lonxml::import = 1;
1.96      albertel  662:   } else {
                    663:     $Apache::lonxml::redirection = 0;
                    664:     $Apache::lonxml::metamode = 0;
                    665:     $Apache::lonxml::evaluate = 1;
                    666:     $Apache::lonxml::import = 1;
                    667:   }
                    668: }
                    669: 
1.82      ng        670: sub init_safespace {
                    671:   my ($target,$safeeval,$safehole,$safeinit) = @_;
                    672:   $safeeval->permit("entereval");
                    673:   $safeeval->permit(":base_math");
                    674:   $safeeval->permit("sort");
1.286     albertel  675:   $safeeval->permit("time");
1.82      ng        676:   $safeeval->deny(":base_io");
1.102     albertel  677:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.251     albertel  678:   $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
1.82      ng        679:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
                    680:   
                    681:   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
                    682:   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
                    683:   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
                    684:   $safehole->wrap(\&Math::Cephes::sinh,$safeeval,'&sinh');
                    685:   $safehole->wrap(\&Math::Cephes::cosh,$safeeval,'&cosh');
                    686:   $safehole->wrap(\&Math::Cephes::tanh,$safeeval,'&tanh');
                    687:   $safehole->wrap(\&Math::Cephes::asinh,$safeeval,'&asinh');
                    688:   $safehole->wrap(\&Math::Cephes::acosh,$safeeval,'&acosh');
                    689:   $safehole->wrap(\&Math::Cephes::atanh,$safeeval,'&atanh');
                    690:   $safehole->wrap(\&Math::Cephes::erf,$safeeval,'&erf');
                    691:   $safehole->wrap(\&Math::Cephes::erfc,$safeeval,'&erfc');
                    692:   $safehole->wrap(\&Math::Cephes::j0,$safeeval,'&j0');
                    693:   $safehole->wrap(\&Math::Cephes::j1,$safeeval,'&j1');
                    694:   $safehole->wrap(\&Math::Cephes::jn,$safeeval,'&jn');
                    695:   $safehole->wrap(\&Math::Cephes::jv,$safeeval,'&jv');
                    696:   $safehole->wrap(\&Math::Cephes::y0,$safeeval,'&y0');
                    697:   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
                    698:   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
                    699:   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
1.215     albertel  700:   
                    701:   $safehole->wrap(\&Math::Cephes::bdtr  ,$safeeval,'&bdtr'  );
                    702:   $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
                    703:   $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
                    704:   $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
                    705:   $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
                    706:   $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
                    707:   $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
                    708:   $safehole->wrap(\&Math::Cephes::fdtr  ,$safeeval,'&fdtr'  );
                    709:   $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
                    710:   $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
                    711:   $safehole->wrap(\&Math::Cephes::gdtr  ,$safeeval,'&gdtr'  );
                    712:   $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
                    713:   $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
                    714:   $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
                    715:   $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
                    716:   $safehole->wrap(\&Math::Cephes::ndtr  ,$safeeval,'&ndtr'  );
                    717:   $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
                    718:   $safehole->wrap(\&Math::Cephes::pdtr  ,$safeeval,'&pdtr'  );
                    719:   $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
                    720:   $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
                    721:   $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
                    722:   $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
                    723: 
                    724: #  $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
                    725: #  $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
                    726: #  $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
                    727: #  $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
                    728: #  $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
                    729: #  $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
                    730: 
1.91      ng        731:   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
                    732:   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
                    733:   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
                    734:   $safehole->wrap(\&Math::Random::random_f,$safeeval,'&math_random_f');
                    735:   $safehole->wrap(\&Math::Random::random_gamma,$safeeval,'&math_random_gamma');
                    736:   $safehole->wrap(\&Math::Random::random_multivariate_normal,$safeeval,'&math_random_multivariate_normal');
                    737:   $safehole->wrap(\&Math::Random::random_multinomial,$safeeval,'&math_random_multinomial');
                    738:   $safehole->wrap(\&Math::Random::random_noncentral_chi_square,$safeeval,'&math_random_noncentral_chi_square');
                    739:   $safehole->wrap(\&Math::Random::random_noncentral_f,$safeeval,'&math_random_noncentral_f');
                    740:   $safehole->wrap(\&Math::Random::random_normal,$safeeval,'&math_random_normal');
                    741:   $safehole->wrap(\&Math::Random::random_permutation,$safeeval,'&math_random_permutation');
1.93      ng        742:   $safehole->wrap(\&Math::Random::random_permuted_index,$safeeval,'&math_random_permuted_index');
1.91      ng        743:   $safehole->wrap(\&Math::Random::random_uniform,$safeeval,'&math_random_uniform');
                    744:   $safehole->wrap(\&Math::Random::random_poisson,$safeeval,'&math_random_poisson');
                    745:   $safehole->wrap(\&Math::Random::random_uniform_integer,$safeeval,'&math_random_uniform_integer');
                    746:   $safehole->wrap(\&Math::Random::random_negative_binomial,$safeeval,'&math_random_negative_binomial');
                    747:   $safehole->wrap(\&Math::Random::random_binomial,$safeeval,'&math_random_binomial');
                    748:   $safehole->wrap(\&Math::Random::random_seed_from_phrase,$safeeval,'&random_seed_from_phrase');
                    749:   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
                    750:   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
                    751:   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
                    752: 
1.82      ng        753: #need to inspect this class of ops
                    754: # $safeeval->deny(":base_orig");
1.91      ng        755:   $safeinit .= ';$external::target="'.$target.'";';
1.121     albertel  756:   my $rndseed;
1.123     albertel  757:   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    758:   $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
1.121     albertel  759:   $safeinit .= ';$external::randomseed='.$rndseed.';';
1.249     albertel  760:   &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.82      ng        761:   &Apache::run::run($safeinit,$safeeval);
1.207     albertel  762: }
                    763: 
                    764: sub default_homework_load {
                    765:     my ($safeeval)=@_;
                    766:     &Apache::lonxml::debug('Loading default_homework');
                    767:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1.241     albertel  768:     if ($default eq -1) {
1.207     albertel  769: 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
                    770:     } else {
                    771: 	&Apache::run::run($default,$safeeval);
                    772: 	$Apache::lonxml::default_homework_loaded=1;
                    773:     }
1.17      albertel  774: }
                    775: 
1.55      albertel  776: sub startredirection {
                    777:   $Apache::lonxml::redirection++;
                    778:   push (@Apache::lonxml::outputstack, '');
                    779: }
                    780: 
                    781: sub endredirection {
                    782:   if (!$Apache::lonxml::redirection) {
1.72      albertel  783:     &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
1.55      albertel  784:     return '';
                    785:   }
                    786:   $Apache::lonxml::redirection--;
                    787:   pop @Apache::lonxml::outputstack;
1.97      albertel  788: }
                    789: 
                    790: sub end_tag {
                    791:   my ($tagstack,$parstack,$token)=@_;
                    792:   pop(@$tagstack);
                    793:   pop(@$parstack);
                    794:   &decreasedepth($token);
1.55      albertel  795: }
                    796: 
1.17      albertel  797: sub initdepth {
                    798:   @Apache::lonxml::depthcounter=();
                    799:   $Apache::lonxml::depth=-1;
                    800:   $Apache::lonxml::olddepth=-1;
                    801: }
                    802: 
                    803: sub increasedepth {
1.19      albertel  804:   my ($token) = @_;
1.17      albertel  805:   $Apache::lonxml::depth++;
                    806:   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
                    807:   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
                    808:     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
                    809:   }
1.42      albertel  810:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  811:   &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
1.54      albertel  812: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  813: }
                    814: 
                    815: sub decreasedepth {
1.19      albertel  816:   my ($token) = @_;
1.17      albertel  817:   $Apache::lonxml::depth--;
1.36      albertel  818:   if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
                    819:     $#Apache::lonxml::depthcounter--;
                    820:     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
                    821:   }
1.43      albertel  822:   if (  $Apache::lonxml::depth < -1) {
1.280     www       823:     &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1.43      albertel  824:     $Apache::lonxml::depth='-1';
                    825:   }
1.42      albertel  826:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.64      albertel  827:   &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
1.54      albertel  828: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  829: }
1.19      albertel  830: 
1.180     albertel  831: sub get_all_text_unbalanced {
1.190     albertel  832: #there is a copy of this in lonpublisher.pm
1.180     albertel  833:  my($tag,$pars)= @_;
                    834:  my $token;
                    835:  my $result='';
                    836:  $tag='<'.$tag.'>';
                    837:  while ($token = $$pars[-1]->get_token) {
                    838:    if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    839:      $result.=$token->[1];
                    840:    } elsif ($token->[0] eq 'PI') {
                    841:      $result.=$token->[2];
                    842:    } elsif ($token->[0] eq 'S') {
                    843:      $result.=$token->[4];
                    844:    } elsif ($token->[0] eq 'E')  {
                    845:      $result.=$token->[2];
                    846:    }
1.211     albertel  847:    if ($result =~ /(.*)\Q$tag\E(.*)/s) {
1.180     albertel  848:      &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    849:      &Apache::lonxml::debug('Result is :'.$1);
                    850:      $result=$1;
                    851:      my $redo=$tag.$2;
                    852:      &Apache::lonxml::newparser($pars,\$redo);
                    853:      last;
                    854:    }
                    855:  }
                    856:  return $result
1.204     albertel  857: }
                    858: 
                    859: sub increment_counter {
1.247     albertel  860:     my ($increment) = @_;
1.289     sakharuk  861:     if (defined($increment) && $increment gt 0) {
                    862: 	$Apache::lonxml::counter+=$increment;
                    863:     } else {
                    864: 	$Apache::lonxml::counter++;
1.247     albertel  865:     }
1.289     sakharuk  866:     $Apache::lonxml::counter_changed=1;
1.204     albertel  867: }
                    868: 
                    869: sub init_counter {
                    870:     if (defined($ENV{'form.counter'})) {
                    871: 	$Apache::lonxml::counter=$ENV{'form.counter'};
1.247     albertel  872: 	$Apache::lonxml::counter_changed=0;
1.237     sakharuk  873:     } else {
1.204     albertel  874: 	$Apache::lonxml::counter=1;
1.247     albertel  875: 	$Apache::lonxml::counter_changed=1;
1.204     albertel  876:     }
                    877: }
                    878: 
                    879: sub store_counter {
                    880:     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
                    881:     return '';
1.180     albertel  882: }
                    883: 
1.19      albertel  884: sub get_all_text {
1.270     albertel  885:     my($tag,$pars,$style)= @_;
                    886:     my $gotfullstack=1;
                    887:     if (ref($pars) ne 'ARRAY') {
                    888: 	$gotfullstack=0;
                    889: 	$pars=[$pars];
                    890:     }
                    891:     if (ref($style) ne 'HASH') {
                    892: 	$style={};
                    893:     }
                    894:     my $depth=0;
                    895:     my $token;
                    896:     my $result='';
                    897:     if ( $tag =~ m:^/: ) { 
                    898: 	my $tag=substr($tag,1); 
                    899: 	#&Apache::lonxml::debug("have:$tag:");
                    900: 	my $top_empty=0;
                    901: 	while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
                    902: 	    while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
                    903: 		#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
                    904: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    905: 		    $result.=$token->[1];
                    906: 		} elsif ($token->[0] eq 'PI') {
                    907: 		    $result.=$token->[2];
                    908: 		} elsif ($token->[0] eq 'S') {
                    909: 		    if ($token->[1] =~ /^$tag$/i) { $depth++; }
                    910: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
                    911: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
                    912: 		    $result.=$token->[4];
                    913: 		} elsif ($token->[0] eq 'E')  {
                    914: 		    if ( $token->[1] =~ /^$tag$/i) { $depth--; }
                    915: 		    #skip sending back the last end tag
1.283     albertel  916: 		    if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1.270     albertel  917: 			my $string=
                    918: 			    '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
                    919: 				$$style{'/'.$token->[1]}.
                    920: 				    $token->[2].
                    921: 					'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    922: 			&Apache::lonxml::newparser($pars,\$string);
                    923: 			#&Apache::lonxml::debug("reParsing $string");
                    924: 			next;
                    925: 		    }
                    926: 		    if ($depth > -1) {
                    927: 			$result.=$token->[2];
                    928: 		    } else {
                    929: 			$$pars[-1]->unget_token($token);
                    930: 		    }
                    931: 		}
                    932: 	    }
                    933: 	    if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
                    934: 	    if (($depth >=0) && ($#$pars > 0) ) {
                    935: 		pop(@$pars);
                    936: 		pop(@Apache::lonxml::pwd);
                    937: 	    }
                    938: 	}
                    939: 	if ($top_empty && $depth >= 0) {
                    940: 	    #never found the end tag ran out of text, throw error send back blank
                    941: 	    &error('Never found end tag for &lt;'.$tag.
                    942: 		   '&gt; current string <pre>'.
                    943: 		   &HTML::Entities::encode($result).
                    944: 		   '</pre>');
                    945: 	    if ($gotfullstack) {
                    946: 		my $newstring='</'.$tag.'>'.$result;
                    947: 		&Apache::lonxml::newparser($pars,\$newstring);
                    948: 	    }
                    949: 	    $result='';
                    950: 	}
                    951:     } else {
                    952: 	while ($#$pars > -1) {
                    953: 	    while ($token = $$pars[-1]->get_token) {
                    954: 		#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                    955: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||
                    956: 		    ($token->[0] eq 'D')) {
                    957: 		    $result.=$token->[1];
                    958: 		} elsif ($token->[0] eq 'PI') {
                    959: 		    $result.=$token->[2];
                    960: 		} elsif ($token->[0] eq 'S') {
                    961: 		    if ( $token->[1] =~ /^$tag$/i) {
                    962: 			$$pars[-1]->unget_token($token); last;
                    963: 		    } else {
                    964: 			$result.=$token->[4];
                    965: 		    }
                    966: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/i) { $Apache::lonxml::usestyle=1; }
                    967: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/i) { $Apache::lonxml::usestyle=0; }
                    968: 		} elsif ($token->[0] eq 'E')  {
                    969: 		    $result.=$token->[2];
                    970: 		}
                    971: 	    }
                    972: 	    if (($#$pars > 0) ) {
                    973: 		pop(@$pars);
                    974: 		pop(@Apache::lonxml::pwd);
                    975: 	    } else { last; }
                    976: 	}
                    977:     }
                    978:     #&Apache::lonxml::debug("Exit:$result:");
                    979:     return $result
1.19      albertel  980: }
                    981: 
1.23      albertel  982: sub newparser {
                    983:   my ($parser,$contentref,$dir) = @_;
1.167     albertel  984:   push (@$parser,HTML::LCParser->new($contentref));
1.56      albertel  985:   $$parser['-1']->xml_mode('1');
1.23      albertel  986:   if ( $dir eq '' ) {
                    987:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                    988:   } else {
                    989:     push (@Apache::lonxml::pwd, $dir);
                    990:   } 
                    991: }
1.1       sakharuk  992: 
1.8       albertel  993: sub parstring {
                    994:   my ($token) = @_;
                    995:   my $temp='';
1.142     albertel  996:   foreach (@{$token->[3]}) {
1.35      www       997:     unless ($_=~/\W/) {
1.42      albertel  998:       my $val=$token->[2]->{$_};
1.231     albertel  999:       $val =~ s/([\%\@\\\"\'])/\\$1/g;
1.51      albertel 1000:       #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.293     albertel 1001:       if ($val !~ m/^\s*\$[a-z_]/i) { $val =~ s/\$/\\\$/g; }
1.267     sakharuk 1002:       $temp .= "my \$$_=\"$val\";";
1.20      albertel 1003:     }
1.142     albertel 1004:   }
1.8       albertel 1005:   return $temp;
                   1006: }
1.22      albertel 1007: 
1.34      www      1008: sub writeallows {
1.126     www      1009:     unless ($#extlinks>=0) { return; }
1.34      www      1010:     my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1.111     www      1011:     if ($ENV{'httpref.'.$thisurl}) {
                   1012: 	$thisurl=$ENV{'httpref.'.$thisurl};
                   1013:     }
1.34      www      1014:     my $thisdir=$thisurl;
                   1015:     $thisdir=~s/\/[^\/]+$//;
                   1016:     my %httpref=();
1.142     albertel 1017:     foreach (@extlinks) {
1.34      www      1018:        $httpref{'httpref.'.
1.125     www      1019:  	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1.142     albertel 1020:     }
1.126     www      1021:     @extlinks=();
1.34      www      1022:     &Apache::lonnet::appenv(%httpref);
                   1023: }
                   1024: 
1.281     albertel 1025: sub register_ssi {
                   1026:     my ($url,%form)=@_;
                   1027:     push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
                   1028:     return '';
                   1029: }
                   1030: 
                   1031: sub do_registered_ssi {
                   1032:     foreach my $info (@Apache::lonxml::ssi_info) {
                   1033: 	my %form=%{ $info->{'form'}};
                   1034: 	my $url=$info->{'url'};
                   1035: 	&Apache::lonnet::ssi($url,%form);
                   1036:     }
                   1037: }
1.66      www      1038: #
                   1039: # Afterburner handles anchors, highlights and links
                   1040: #
                   1041: sub afterburn {
                   1042:     my $result=shift;
1.154     albertel 1043:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1044: 					    ['highlight','anchor','link']);
1.66      www      1045:     if ($ENV{'form.highlight'}) {
1.142     albertel 1046:        foreach (split(/\,/,$ENV{'form.highlight'})) {
1.66      www      1047:            my $anchorname=$_;
                   1048: 	   my $matchthis=$anchorname;
                   1049:            $matchthis=~s/\_+/\\s\+/g;
                   1050:            $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1051:        }
1.66      www      1052:     }
                   1053:     if ($ENV{'form.link'}) {
1.142     albertel 1054:        foreach (split(/\,/,$ENV{'form.link'})) {
1.66      www      1055:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1056: 	   my $matchthis=$anchorname;
                   1057:            $matchthis=~s/\_+/\\s\+/g;
                   1058:            $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1059:        }
1.66      www      1060:     }
                   1061:     if ($ENV{'form.anchor'}) {
                   1062:         my $anchorname=$ENV{'form.anchor'};
                   1063: 	my $matchthis=$anchorname;
                   1064:         $matchthis=~s/\_+/\\s\+/g;
                   1065:         $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
                   1066:         $result.=(<<"ENDSCRIPT");
1.226     albertel 1067: <script type="text/javascript">
1.66      www      1068:     document.location.hash='$anchorname';
                   1069: </script>
                   1070: ENDSCRIPT
                   1071:     }
                   1072:     return $result;
                   1073: }
                   1074: 
1.79      www      1075: sub storefile {
                   1076:     my ($file,$contents)=@_;
1.290     albertel 1077:     &Apache::lonnet::correct_line_ends(\$contents);
1.79      www      1078:     if (my $fh=Apache::File->new('>'.$file)) {
                   1079: 	print $fh $contents;
                   1080:         $fh->close();
1.271     www      1081:         return 1;
1.147     albertel 1082:     } else {
1.271     www      1083: 	&warning("Unable to save file $file");
                   1084: 	return 0;
1.79      www      1085:     }
                   1086: }
                   1087: 
1.151     albertel 1088: sub createnewhtml {
                   1089:   my $filecontents=(<<SIMPLECONTENT);
1.78      www      1090: <html>
                   1091: <head>
                   1092: <title>
                   1093:                            Title of Document Goes Here
                   1094: </title>
                   1095: </head>
                   1096: <body bgcolor="#FFFFFF">
                   1097: 
                   1098:                            Body of Document Goes Here
                   1099: 
                   1100: </body>
                   1101: </html>
                   1102: SIMPLECONTENT
1.151     albertel 1103:   return $filecontents;
                   1104: }
                   1105: 
1.274     albertel 1106: sub createnewsty {
                   1107:   my $filecontents=(<<SIMPLECONTENT);
                   1108: <definetag name="">
                   1109:     <render>
                   1110:        <web></web>
                   1111:        <tex></tex>
                   1112:     </render>
                   1113: </definetag>
                   1114: SIMPLECONTENT
                   1115:   return $filecontents;
                   1116: }
                   1117: 
1.147     albertel 1118: 
1.151     albertel 1119: sub inserteditinfo {
1.274     albertel 1120:       my ($result,$filecontents,$filetype)=@_;
1.157     albertel 1121:       $filecontents = &HTML::Entities::encode($filecontents);
1.147     albertel 1122: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.274     albertel 1123:       my $xml_help = '';
                   1124:       if ($filetype eq 'html') {
                   1125: 	  $xml_help=Apache::loncommon::helpLatexCheatsheet();
                   1126:       }
                   1127:       my $cleanbut = '';
                   1128:       if ($filetype eq 'html') {
1.280     www      1129: 	  $cleanbut='<input type="submit" name="attemptclean" value="'.
                   1130: 	      &mt('Save and then attempt to clean HTML').'" />';
1.274     albertel 1131:       }
1.254     albertel 1132:       my $titledisplay=&display_title();
1.280     www      1133:       my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
                   1134: 					 'vi' => 'View',
                   1135: 					 'ed' => 'Edit');
1.161     albertel 1136:       my $buttons=(<<BUTTONS);
1.274     albertel 1137: $cleanbut
1.280     www      1138: <input type="submit" name="savethisfile" value="$lt{'st'}" />
                   1139: <input type="submit" name="viewmode" value="$lt{'vi'}" />
1.161     albertel 1140: BUTTONS
1.78      www      1141:       my $editfooter=(<<ENDFOOTER);
                   1142: <hr />
                   1143: <a name="editsection" />
                   1144: <form method="post">
1.240     albertel 1145: $xml_help
1.280     www      1146: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1.170     www      1147: $buttons<br />
1.78      www      1148: <textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
1.170     www      1149: <br />$buttons
1.78      www      1150: <br />
                   1151: </form>
1.254     albertel 1152: $titledisplay
1.78      www      1153: ENDFOOTER
1.147     albertel 1154: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1155:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1156:       return $result;
                   1157: }
                   1158: 
1.152     albertel 1159: sub get_target {
                   1160:   my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
                   1161:   if ( $ENV{'request.state'} eq 'published') {
                   1162:     if ( defined($ENV{'form.grade_target'})
                   1163: 	 && ($viewgrades == 'F' )) {
                   1164:       return ($ENV{'form.grade_target'});
1.153     albertel 1165:     } elsif (defined($ENV{'form.grade_target'})) {
                   1166:       if (($ENV{'form.grade_target'} eq 'web') ||
                   1167: 	  ($ENV{'form.grade_target'} eq 'tex') ) {
                   1168: 	return $ENV{'form.grade_target'}
                   1169:       } else {
                   1170: 	return 'web';
                   1171:       }
1.152     albertel 1172:     } else {
                   1173:       return 'web';
                   1174:     }
                   1175:   } elsif ($ENV{'request.state'} eq 'construct') {
                   1176:     if ( defined($ENV{'form.grade_target'})) {
                   1177:       return ($ENV{'form.grade_target'});
                   1178:     } else {
                   1179:       return 'web';
                   1180:     }
                   1181:   } else {
                   1182:     return 'web';
                   1183:   }
                   1184: }
                   1185: 
1.24      sakharuk 1186: sub handler {
1.255     sakharuk 1187:     my $request=shift;
                   1188:     
                   1189:     my $target=&get_target();
                   1190:     
1.258     albertel 1191:     $Apache::lonxml::debug=$ENV{'user.debug'};
1.255     sakharuk 1192:     
                   1193:     if ($ENV{'browser.mathml'}) {
1.280     www      1194: 	&Apache::loncommon::content_type($request,'text/xml');
1.255     sakharuk 1195:     } else {
1.280     www      1196: 	&Apache::loncommon::content_type($request,'text/html');
1.255     sakharuk 1197:     }
                   1198:     &Apache::loncommon::no_cache($request);
                   1199:     $request->send_http_header;
                   1200:     
                   1201:     return OK if $request->header_only;
1.68      www      1202: 
                   1203: 
1.255     sakharuk 1204:     my $file=&Apache::lonnet::filelocation("",$request->uri);
1.274     albertel 1205:     my $filetype;
                   1206:     if ($file =~ /\.sty$/) {
                   1207: 	$filetype='sty';
                   1208:     } else {
                   1209: 	$filetype='html';
                   1210:     }
1.78      www      1211: #
                   1212: # Edit action? Save file.
                   1213: #
1.255     sakharuk 1214:     unless ($ENV{'request.state'} eq 'published') {
                   1215: 	if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
1.271     www      1216: 	    if (&storefile($file,$ENV{'form.filecont'})) {
1.284     www      1217: 		$request->print("<font COLOR=\"#0000FF\">".&mt('Updated').": ".
                   1218: &Apache::lonlocal::locallocaltime(time)." </font>");
1.271     www      1219: 	    } 
1.255     sakharuk 1220: 	}
                   1221:     }
                   1222:     my %mystyle;
                   1223:     my $result = '';
                   1224:     my $filecontents=&Apache::lonnet::getfile($file);
                   1225:     if ($filecontents eq -1) {
1.284     www      1226: 	my $bodytag=&Apache::loncommon::bodytag('File Error');
                   1227: 	my $fnf=&mt('File not found');
1.255     sakharuk 1228: 	$result=(<<ENDNOTFOUND);
1.78      www      1229: <html>
                   1230: <head>
1.284     www      1231: <title>$fnf</title>
1.78      www      1232: </head>
1.284     www      1233: $bodytag
                   1234: <b>$fnf: $file</b>
1.78      www      1235: </body>
                   1236: </html>
                   1237: ENDNOTFOUND
1.50      albertel 1238:     $filecontents='';
1.255     sakharuk 1239: 	if ($ENV{'request.state'} ne 'published') {
1.274     albertel 1240: 	    if ($filetype eq 'sty') {
                   1241: 		$filecontents=&createnewsty();
                   1242: 	    } else {
                   1243: 		$filecontents=&createnewhtml();
                   1244: 	    }
1.255     sakharuk 1245: 	    $ENV{'form.editmode'}='Edit'; #force edit mode
                   1246: 	}
                   1247:     } else {
                   1248: 	unless ($ENV{'request.state'} eq 'published') {
                   1249: 	    if ($ENV{'form.attemptclean'}) {
                   1250: 		$filecontents=&htmlclean($filecontents,1);
                   1251: 	    }
1.264     www      1252: #
                   1253: # we are in construction space, see if edit mode forced
                   1254:             &Apache::loncommon::get_unprocessed_cgi
                   1255:                           ($ENV{'QUERY_STRING'},['editmode']);
1.255     sakharuk 1256: 	}
                   1257: 	if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
                   1258: 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1259: 						'',%mystyle);
                   1260: 	}
1.147     albertel 1261:     }
1.255     sakharuk 1262:     
1.78      www      1263: #
                   1264: # Edit action? Insert editing commands
                   1265: #
1.255     sakharuk 1266:     unless ($ENV{'request.state'} eq 'published') {
                   1267: 	if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
                   1268: 	    my $displayfile=$request->uri;
                   1269: 	    $displayfile=~s/^\/[^\/]*//;
                   1270: 	    $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
                   1271: 		'</h3></body></html>';
1.274     albertel 1272: 	    $result=&inserteditinfo($result,$filecontents,$filetype);
1.255     sakharuk 1273: 	}
1.147     albertel 1274:     }
1.274     albertel 1275:     if ($filetype eq 'html') { writeallows($request->uri); }
                   1276: 	
1.255     sakharuk 1277:     
                   1278: 
                   1279:     $request->print($result);
                   1280:     
                   1281:     return OK;
1.253     albertel 1282: }
                   1283: 
                   1284: sub display_title {
                   1285:     my $result;
                   1286:     if ($ENV{'request.state'} eq 'construct') {
                   1287: 	my $title=&Apache::lonnet::gettitle();
                   1288: 	if (!defined($title) || $title eq '') {
                   1289: 	    $title = $ENV{'request.filename'};
                   1290: 	    $title = substr($title, rindex($title, '/') + 1);
                   1291: 	}
                   1292: 	$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
                   1293:     }
                   1294:     return $result;
1.24      sakharuk 1295: }
1.147     albertel 1296: 
1.22      albertel 1297: sub debug {
                   1298:   if ($Apache::lonxml::debug eq 1) {
1.146     albertel 1299:     $|=1;
1.202     albertel 1300:     print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
1.22      albertel 1301:   }
                   1302: }
1.49      albertel 1303: 
1.22      albertel 1304: sub error {
1.205     www      1305:   $errorcount++;
1.74      albertel 1306:   if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
1.166     matthew  1307:     # If printing in construction space, put the error inside <pre></pre>
1.295   ! albertel 1308:       print $Apache::lonxml::warnings_error_header.
        !          1309: 	  "<b>ERROR:</b>".join("\n",@_)."\n";
        !          1310:       $Apache::lonxml::warnings_error_header='';
1.52      albertel 1311:   } else {
                   1312:     print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
                   1313:     #notify author
1.146     albertel 1314:     &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
1.52      albertel 1315:     #notify course
                   1316:     if ( $ENV{'request.course.id'} ) {
1.209     www      1317:       my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1.143     www      1318:       my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
1.209     www      1319:       foreach (keys %users) {
                   1320: 	my ($user,$domain) = split(/:/, $_);
1.143     www      1321: 	&Apache::lonmsg::user_normal_msg($user,$domain,
1.146     albertel 1322:         "Error [$declutter]",join('<br />',@_));
1.52      albertel 1323:       }
                   1324:     }
1.74      albertel 1325: 
1.52      albertel 1326:     #FIXME probably shouldn't have me get everything forever.
1.146     albertel 1327:     &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
1.74      albertel 1328:     #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
1.52      albertel 1329:   }
1.22      albertel 1330: }
1.49      albertel 1331: 
1.22      albertel 1332: sub warning {
1.295   ! albertel 1333:     $warningcount++;
1.261     albertel 1334:   
1.295   ! albertel 1335:     if ($ENV{'form.grade_target'} ne 'tex') {
        !          1336: 	if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
        !          1337: 	    print $Apache::lonxml::warnings_error_header.
        !          1338: 		"<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
        !          1339: 	    $Apache::lonxml::warnings_error_header='';
        !          1340: 	}
        !          1341:     }
1.83      albertel 1342: }
                   1343: 
                   1344: sub get_param {
1.213     albertel 1345:     my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
                   1346:     if ( ! $context ) { $context = -1; }
                   1347:     my $args ='';
                   1348:     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
                   1349:     if ( ! $args ) { return undef; }
                   1350:     if ( $case_insensitive ) {
                   1351: 	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
                   1352: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1353:                                      $safeeval); #'
                   1354: 	} else {
                   1355: 	    return undef;
                   1356: 	}
                   1357:     } else {
                   1358: 	if ( $args =~ /my \$\Q$param\E=\"/ ) {
                   1359: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1360:                                      $safeeval); #'
                   1361: 	} else {
                   1362: 	    return undef;
                   1363: 	}
                   1364:     }
1.22      albertel 1365: }
                   1366: 
1.132     albertel 1367: sub get_param_var {
1.213     albertel 1368:   my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1.132     albertel 1369:   if ( ! $context ) { $context = -1; }
                   1370:   my $args ='';
                   1371:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.230     albertel 1372:   &Apache::lonxml::debug("Args are $args param is $param");
1.213     albertel 1373:   if ($case_insensitive) {
                   1374:       if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
                   1375: 	  return undef;
                   1376:       }
                   1377:   } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1.132     albertel 1378:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.230     albertel 1379:   &Apache::lonxml::debug("first run is $value");
                   1380:   if ($value =~ /^[\$\@\%]\w+$/) {
                   1381:       &Apache::lonxml::debug("doing second");
                   1382:       my @result=&Apache::run::run("return $value",$safeeval,1);
                   1383:       if (!defined($result[0])) {
                   1384: 	  return $value
                   1385:       } else {
                   1386: 	  if (wantarray) { return @result; } else { return $result[0]; }
                   1387:       }
1.132     albertel 1388:   } else {
                   1389:     return $value;
                   1390:   }
                   1391: }
                   1392: 
1.74      albertel 1393: sub register_insert {
1.75      albertel 1394:   my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74      albertel 1395:   my $i;
1.76      albertel 1396:   my $tagnum=0;
1.74      albertel 1397:   my @order;
                   1398:   for ($i=0;$i < $#data; $i++) {
                   1399:     my $line = $data[$i];
                   1400:     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
                   1401:     if ( $line =~ /TABLE/ ) { last; }
1.268     bowersj2 1402:     my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1.135     albertel 1403:     if ($tag) {
                   1404:       $insertlist{"$tagnum.tag"} = $tag;
                   1405:       $insertlist{"$tagnum.description"} = $descrip;
                   1406:       $insertlist{"$tagnum.color"} = $color;
                   1407:       $insertlist{"$tagnum.function"} = $function;
                   1408:       if (!defined($show)) { $show='yes'; }
                   1409:       $insertlist{"$tagnum.show"}= $show;
1.268     bowersj2 1410:       $insertlist{"$tagnum.helpfile"} = $helpfile;
                   1411:       $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1.135     albertel 1412:       $insertlist{"$tag.num"}=$tagnum;
                   1413:       $tagnum++;
                   1414:     }
1.74      albertel 1415:   }
1.76      albertel 1416:   $i++; #skipping TABLE line
                   1417:   $tagnum = 0;
1.74      albertel 1418:   for (;$i < $#data;$i++) {
                   1419:     my $line = $data[$i];
1.76      albertel 1420:     my ($mnemonic,@which) = split(/ +/,$line);
                   1421:     my $tag = $insertlist{"$tagnum.tag"};
1.144     matthew  1422:     for (my $j=0;$j <=$#which;$j++) {
1.74      albertel 1423:       if ( $which[$j] eq 'Y' ) {
1.76      albertel 1424: 	if ($insertlist{"$j.show"} ne 'no') {
                   1425: 	  push(@{ $insertlist{"$tag.which"} },$j);
                   1426: 	}
1.74      albertel 1427:       }
                   1428:     }
1.76      albertel 1429:     $tagnum++;
1.74      albertel 1430:   }
                   1431: }
1.98      albertel 1432: 
                   1433: sub description {
                   1434:   my ($token)=@_;
1.138     albertel 1435:   my $tagnum;
                   1436:   my $tag=$token->[1];
                   1437:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1438:     my $testtag=$namespace.'::'.$tag;
                   1439:     $tagnum=$insertlist{"$testtag.num"};
                   1440:     if (defined($tagnum)) { last; }
                   1441:   }
                   1442:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1443:   return $insertlist{$tagnum.'.description'};
1.268     bowersj2 1444: }
                   1445: 
                   1446: # Returns a list containing the help file, and the description
                   1447: sub helpinfo {
                   1448:   my ($token)=@_;
                   1449:   my $tagnum;
                   1450:   my $tag=$token->[1];
                   1451:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1452:     my $testtag=$namespace.'::'.$tag;
                   1453:     $tagnum=$insertlist{"$testtag.num"};
                   1454:     if (defined($tagnum)) { last; }
                   1455:   }
                   1456:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1457:   return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1.98      albertel 1458: }
1.123     albertel 1459: 
                   1460: # ----------------------------------------------------------------- whichuser
                   1461: # returns a list of $symb, $courseid, $domain, $name that is correct for
                   1462: # calls to lonnet functions for this setup.
                   1463: # - looks for form.grade_ parameters
                   1464: sub whichuser {
1.262     matthew  1465:   my ($passedsymb)=@_;
1.245     albertel 1466:   my ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1467:   if (defined($ENV{'form.grade_symb'})) {
                   1468:     my $tmp_courseid=$ENV{'form.grade_courseid'};
1.269     albertel 1469:     my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
1.123     albertel 1470:     if ($allowed) {
                   1471:       $symb=$ENV{'form.grade_symb'};
                   1472:       $courseid=$ENV{'form.grade_courseid'};
                   1473:       $domain=$ENV{'form.grade_domain'};
                   1474:       $name=$ENV{'form.grade_username'};
                   1475:     }
1.134     albertel 1476:   } else {
1.262     matthew  1477:       if (!$passedsymb) {
                   1478:           $symb=&Apache::lonnet::symbread();
                   1479:       } else {
                   1480:           $symb=$passedsymb;
                   1481:       }
1.244     albertel 1482:       $courseid=$ENV{'request.course.id'};
                   1483:       $domain=$ENV{'user.domain'};
                   1484:       $name=$ENV{'user.name'};
                   1485:       if ($name eq 'public' && $domain eq 'public') {
                   1486: 	  if (!defined($ENV{'form.username'})) {
                   1487: 	      $ENV{'form.username'}.=time.rand(10000000);
                   1488: 	  }
                   1489: 	  $name.=$ENV{'form.username'};
                   1490:       }
1.123     albertel 1491:   }
1.245     albertel 1492:   return ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1493: }
                   1494: 
1.1       sakharuk 1495: 1;
                   1496: __END__
1.68      www      1497: 
                   1498: 

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