Annotation of loncom/xml/lonxml.pm, revision 1.374

1.2       sakharuk    1: # The LearningOnline Network with CAPA
1.3       sakharuk    2: # XML Parser Module 
1.2       sakharuk    3: #
1.374   ! www         4: # $Id: lonxml.pm,v 1.373 2005/05/03 06:44:56 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: #
1.316     albertel   39: 
1.2       sakharuk   40: 
1.4       albertel   41: package Apache::lonxml; 
1.33      www        42: use vars 
1.320     www        43: qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount @htmlareafields);
1.1       sakharuk   44: use strict;
1.167     albertel   45: use HTML::LCParser();
1.161     albertel   46: use HTML::TreeBuilder();
                     47: use HTML::Entities();
                     48: use Safe();
                     49: use Safe::Hole();
                     50: use Math::Cephes();
                     51: use Math::Random();
                     52: use Opcode();
1.271     www        53: use POSIX qw(strftime);
1.339     albertel   54: use Time::HiRes qw( gettimeofday tv_interval );
1.266     bowersj2   55: 
1.72      albertel   56: sub register {
1.141     albertel   57:   my ($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();
1.372     albertel   84: use Apache::lonnet;
1.161     albertel   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: $Apache::lonxml::warnings_error_header='';
                    150: 
1.68      www       151: sub xmlbegin {
1.356     albertel  152:     my ($style)=@_;
                    153:     my $output='';
                    154:     @htmlareafields=();
1.372     albertel  155:     if ($env{'browser.mathml'}) {
1.356     albertel  156: 	$output='<?xml version="1.0"?>'
1.357     albertel  157:             #.'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'."\n"
                    158: #            .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
                    159:             
                    160: #	    .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" [<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">] >'
                    161: 	    .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">'
1.68      www       162:             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
1.357     albertel  163: 	    .'xmlns="http://www.w3.org/1999/xhtml">';
1.356     albertel  164:     } else {
                    165: 	$output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>';
                    166:     }
                    167:     if ($style eq 'encode') {
                    168: 	$output=&HTML::Entities::encode($output,'<>&"');
                    169:     }
                    170:     return $output;
1.68      www       171: }
                    172: 
                    173: sub xmlend {
1.335     sakharuk  174:     my ($target,$parser)=@_;
1.278     www       175:     my $mode='xml';
                    176:     my $status='OPEN';
1.368     albertel  177:     if ($Apache::lonhomework::parsing_a_problem ||
                    178: 	$Apache::lonhomework::parsing_a_task ) {
1.278     www       179: 	$mode='problem';
                    180: 	$status=$Apache::inputtags::status[-1]; 
                    181:     }
1.362     matthew   182:     my $discussion;
                    183:     &Apache::loncommon::get_unprocessed_cgi
1.372     albertel  184:         ($env{'query_string'},['LONCAPA_INTERNAL_no_discussion']);
                    185:     if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
                    186:         $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
1.362     matthew   187:         $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
                    188:     }
1.334     sakharuk  189:     if ($target eq 'tex') {
1.335     sakharuk  190: 	$discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
1.334     sakharuk  191: 	&Apache::lonxml::newparser($parser,\$discussion,'');
                    192: 	return '';
                    193:     } else {
1.360     albertel  194: 	return $discussion.&Apache::loncommon::endbodytag();
1.334     sakharuk  195:     }
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) {
1.372     albertel  253: 	$tuname=$env{'user.name'};
                    254:         $tudom=$env{'user.domain'};
                    255:         $tcrsid=$env{'request.course.id'};
1.112     www       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').': '.$tcrsid.
1.372     albertel  291: 	       '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
1.284     www       292:                '<br />'.&mt('DocID').': '.$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: 
1.356     albertel  299: sub fontsettings {
1.70      www       300:     my $headerstring='';
1.372     albertel  301:     if (($env{'browser.os'} eq 'mac') && (!$env{'browser.mathml'})) { 
1.248     albertel  302: 	$headerstring.=
1.343     albertel  303: 	    '<meta Content-Type="text/html; charset=x-mac-roman" />';
1.372     albertel  304:     } elsif (!$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();
1.370     albertel  324:  &Apache::bridgetask::initialize_bridgetask();
1.232     albertel  325:  &Apache::outputtags::initialize_outputtags();
                    326:  &Apache::edit::initialize_edit();
1.287     albertel  327:  &Apache::londefdef::initialize_londefdef();
1.244     albertel  328: 
1.178     www       329: #
                    330: # do we have a course style file?
                    331: #
                    332: 
1.372     albertel  333:  if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
1.178     www       334:      my $bodytext=
1.372     albertel  335: 	 $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
1.178     www       336:      if ($bodytext) {
1.337     albertel  337: 	 foreach my $file (split(',',$bodytext)) {
                    338: 	     my $location=&Apache::lonnet::filelocation('',$file);
                    339: 	     my $styletext=&Apache::lonnet::getfile($location);
                    340: 	     if ($styletext ne '-1') {
                    341: 		 %style_for_target = (%style_for_target,
                    342: 				      &Apache::style::styleparser($target,$styletext));
                    343: 	     }
                    344: 	 }
                    345:      }
1.372     albertel  346:  } elsif ($env{'construct.style'} && ($env{'request.state'} eq 'construct')) {
                    347:      my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
1.291     sakharuk  348:      my $styletext=&Apache::lonnet::getfile($location);
                    349:        if ($styletext ne '-1') {
                    350:           %style_for_target = (%style_for_target,
                    351:                           &Apache::style::styleparser($target,$styletext));
                    352:       }
1.178     www       353:  }
1.255     sakharuk  354: #&printalltags();
1.16      albertel  355:  my @pars = ();
1.372     albertel  356:  my $pwd=$env{'request.filename'};
1.23      albertel  357:  $pwd =~ s:/[^/]*$::;
                    358:  &newparser(\@pars,\$content_file_string,$pwd);
1.24      sakharuk  359: 
1.3       sakharuk  360:  my $safeeval = new Safe;
1.40      albertel  361:  my $safehole = new Safe::Hole;
1.82      ng        362:  &init_safespace($target,$safeeval,$safehole,$safeinit);
1.3       sakharuk  363: #-------------------- Redefinition of the target in the case of compound target
                    364: 
                    365:  ($target, my @tenta) = split('&&',$target);
                    366: 
1.150     albertel  367:  my @stack = ();
1.3       sakharuk  368:  my @parstack = ();
1.358     albertel  369:  &initdepth();
                    370:  &init_alarm();
1.101     albertel  371:  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
                    372: 				   $safeeval,\%style_for_target);
1.255     sakharuk  373: 
1.372     albertel  374:  if ($env{'request.uri'}) {
                    375:     &writeallows($env{'request.uri'});
1.125     www       376:  }
1.281     albertel  377:  &do_registered_ssi();
1.204     albertel  378:  if ($Apache::lonxml::counter_changed) { &store_counter() }
1.372     albertel  379:  if ($env{'form.return_only_error_and_warning_counts'}) {
1.361     www       380:      return "$errorcount:$warningcount";
                    381:  }
1.3       sakharuk  382:  return $finaloutput;
1.106     www       383: }
                    384: 
1.191     albertel  385: sub latex_special_symbols {
1.272     albertel  386:     my ($string,$where)=@_;
1.235     sakharuk  387:     if ($where eq 'header') {
1.272     albertel  388: 	$string =~ s/(\\|_|\^)/ /g;
1.311     albertel  389: 	$string =~ s/(\$|%|\{|\})/\\$1/g;
1.273     sakharuk  390: 	$string =~ s/_/ /g;
1.311     albertel  391: 	$string=&Apache::lonprintout::character_chart($string);
                    392: 	# any & or # leftover should be safe to just escape
                    393:         $string=~s/([^\\])\&/$1\\\&/g;
                    394:         $string=~s/([^\\])\#/$1\\\#/g;
1.229     sakharuk  395:     } else {
1.312     albertel  396: 	$string=~s/\\/\\ensuremath{\\backslash}/g;
1.367     albertel  397: 	$string=~s/\\\%|\%/\\\%/g;
                    398: 	$string=~s/\\{|{/\\{/g;
                    399: 	$string=~s/\\}|}/\\}/g;
                    400: 	$string=~s/\\\$|\$/\\\$/g;
                    401: 	$string=~s/\\\_|\_/\\\_/g;
1.313     albertel  402:         $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
1.310     sakharuk  403: 	$string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
1.311     albertel  404: 	$string=&Apache::lonprintout::character_chart($string);
                    405: 	# any & or # leftover should be safe to just escape
1.367     albertel  406: 	$string=~s/\\\&|\&/\\\&/g;
                    407: 	$string=~s/\\\#|\#/\\\#/g;
1.332     sakharuk  408:         $string=~s/\|/\$\\mid\$/g;
1.310     sakharuk  409: #single { or } How to escape?
1.229     sakharuk  410:     }
1.272     albertel  411:     return $string;
1.188     sakharuk  412: }
                    413: 
1.101     albertel  414: sub inner_xmlparse {
                    415:   my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
                    416:   my $finaloutput = '';
                    417:   my $result;
                    418:   my $token;
1.258     albertel  419:   my $dontpop=0;
1.101     albertel  420:   while ( $#$pars > -1 ) {
                    421:     while ($token = $$pars['-1']->get_token) {
1.261     albertel  422:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
1.101     albertel  423: 	if ($metamode<1) {
1.190     albertel  424: 	    my $text=$token->[1];
1.193     albertel  425: 	    if ($token->[0] eq 'C' && $target eq 'tex') {
1.239     sakharuk  426: 		$text = '';
                    427: #		$text = '%'.$text."\n";
1.182     sakharuk  428: 	    }
1.190     albertel  429: 	    $result.=$text;
1.101     albertel  430: 	}
1.261     albertel  431:       } elsif (($token->[0] eq 'D')) {
                    432: 	if ($metamode<1 && $target eq 'web') {
                    433: 	    my $text=$token->[1];
                    434: 	    $result.=$text;
                    435: 	}
1.101     albertel  436:       } elsif ($token->[0] eq 'PI') {
1.261     albertel  437: 	if ($metamode<1 && $target eq 'web') {
1.101     albertel  438: 	  $result=$token->[2];
                    439: 	}
                    440:       } elsif ($token->[0] eq 'S') {
1.140     albertel  441: 	# add tag to stack
1.101     albertel  442: 	push (@$stack,$token->[1]);
                    443: 	# add parameters list to another stack
                    444: 	push (@$parstack,&parstring($token));
1.140     albertel  445: 	&increasedepth($token);
1.212     albertel  446: 	if ($Apache::lonxml::usestyle &&
                    447: 	    exists($$style_for_target{$token->[1]})) {
                    448: 	    $Apache::lonxml::usestyle=0;
                    449: 	    my $string=$$style_for_target{$token->[1]}.
                    450: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    451: 	    &Apache::lonxml::newparser($pars,\$string);
1.257     albertel  452: 	    $Apache::lonxml::style_values=$$parstack[-1];
1.259     albertel  453: 	    $Apache::lonxml::style_end_values=$$parstack[-1];
1.101     albertel  454: 	} else {
                    455: 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
                    456: 			     $parstack, $pars, $safeeval, $style_for_target);
1.140     albertel  457: 	}
1.101     albertel  458:       } elsif ($token->[0] eq 'E') {
1.212     albertel  459: 	if ($Apache::lonxml::usestyle &&
                    460: 	    exists($$style_for_target{'/'."$token->[1]"})) {
                    461: 	    $Apache::lonxml::usestyle=0;
                    462: 	    my $string=$$style_for_target{'/'.$token->[1]}.
1.258     albertel  463: 	      '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
1.212     albertel  464: 	    &Apache::lonxml::newparser($pars,\$string);
1.259     albertel  465: 	    $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
                    466: 	    $Apache::lonxml::style_end_values='';
1.258     albertel  467: 	    $dontpop=1;
1.101     albertel  468: 	} else {
1.258     albertel  469: 	    #clear out any tags that didn't end
                    470: 	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
                    471: 		my $lasttag=$$stack[-1];
1.317     albertel  472: 		if ($token->[1] =~ /^\Q$lasttag\E$/i) {
1.258     albertel  473: 		    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' as end tag to &lt;'.$$stack[-1].'&gt;');
                    474: 		    last;
                    475: 		} else {
                    476: 		    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' when looking for &lt;/'.$$stack[-1].'&gt; in file');
                    477: 		    &end_tag($stack,$parstack,$token);
                    478: 		}
                    479: 	    }
                    480: 	    $result = &callsub("end_$token->[1]", $target, $token, $stack,
                    481: 			       $parstack, $pars,$safeeval, $style_for_target);
1.101     albertel  482: 	}
                    483:       } else {
                    484: 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
                    485:       }
                    486:       #evaluate variable refs in result
1.282     albertel  487:       if ($Apache::lonxml::post_evaluate &&$result ne "") {
1.257     albertel  488: 	  my $extras;
                    489: 	  if (!$Apache::lonxml::usestyle) {
                    490: 	      $extras=$Apache::lonxml::style_values;
                    491: 	  }
1.101     albertel  492: 	if ( $#$parstack > -1 ) {
1.257     albertel  493: 	  $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
1.101     albertel  494: 	} else {
1.257     albertel  495: 	  $result= &Apache::run::evaluate($result,$safeeval,$extras);
1.101     albertel  496: 	}
1.163     albertel  497:       }
1.282     albertel  498:       $Apache::lonxml::post_evaluate=1;
                    499: 
1.190     albertel  500:       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
1.249     albertel  501: 	  #Style file definitions should be correct
1.250     albertel  502: 	  if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
1.311     albertel  503: 	      $result=&latex_special_symbols($result);
1.249     albertel  504: 	  }
1.190     albertel  505:       }
                    506: 
1.169     albertel  507:       if ($Apache::lonxml::redirection) {
                    508: 	$Apache::lonxml::outputstack['-1'] .= $result;
                    509:       } else {
                    510: 	$finaloutput.=$result;
                    511:       }
                    512:       $result = '';
                    513: 
1.258     albertel  514:       if ($token->[0] eq 'E' && !$dontpop) {
1.101     albertel  515: 	&end_tag($stack,$parstack,$token);
                    516:       }
1.258     albertel  517:       $dontpop=0;
1.224     albertel  518:     }	
1.212     albertel  519:     if ($#$pars > -1) {
                    520: 	pop @$pars;
                    521: 	pop @Apache::lonxml::pwd;
                    522:     }
1.101     albertel  523:   }
                    524: 
                    525:   # if ($target eq 'meta') {
                    526:   #   $finaloutput.=&endredirection;
                    527:   # }
                    528: 
1.169     albertel  529: 
1.101     albertel  530:   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
                    531:     $finaloutput=&afterburn($finaloutput);
1.216     sakharuk  532:   }	    
1.101     albertel  533:   return $finaloutput;
                    534: }
1.67      www       535: 
1.318     matthew   536: ## 
                    537: ## Looks to see if there is a subroutine defined for this tag.  If so, call it,
                    538: ## otherwise do not call it as we do not know what it is.
                    539: ##
1.7       albertel  540: sub callsub {
1.84      albertel  541:   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.7       albertel  542:   my $currentstring='';
1.72      albertel  543:   my $nodefault;
1.7       albertel  544:   {
1.59      albertel  545:     my $sub1;
1.7       albertel  546:     no strict 'refs';
1.68      www       547:     my $tag=$token->[1];
1.236     www       548: # get utterly rid of extended html tags
                    549:     if ($tag=~/^x\-/i) { return ''; }
1.141     albertel  550:     my $space=$Apache::lonxml::alltags{$tag}[-1];
1.68      www       551:     if (!$space) {
1.141     albertel  552:      	$tag=~tr/A-Z/a-z/;
1.68      www       553: 	$sub=~tr/A-Z/a-z/;
1.141     albertel  554: 	$space=$Apache::lonxml::alltags{$tag}[-1]
1.68      www       555:     }
1.97      albertel  556: 
                    557:     my $deleted=0;
                    558:     $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
                    559:     if (($token->[0] eq 'S') && ($target eq 'modified')) {
                    560:       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
                    561: 					     $parstack,$parser,$safeeval,
                    562: 					     $style);
                    563:     }
                    564:     if (!$deleted) {
                    565:       if ($space) {
1.220     albertel  566: 	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
1.97      albertel  567: 	$sub1="$space\:\:$sub";
                    568: 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
                    569: 					     $parstack,$parser,$safeeval,
                    570: 					     $style);
                    571:       } else {
1.318     matthew   572:           if ($target eq 'tex') {
                    573:               # throw away tag name
                    574:               return '';
                    575:           }
1.220     albertel  576: 	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
1.97      albertel  577: 	if ($metamode <1) {
                    578: 	  if (defined($token->[4]) && ($metamode < 1)) {
                    579: 	    $currentstring = $token->[4];
                    580: 	  } else {
                    581: 	    $currentstring = $token->[2];
                    582: 	  }
1.62      sakharuk  583: 	}
1.7       albertel  584:       }
1.97      albertel  585:       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
                    586:       if ($currentstring eq '' && $nodefault eq '') {
                    587: 	if ($target eq 'edit') {
1.220     albertel  588: 	  #&Apache::lonxml::debug("doing default edit for $token->[1]");
1.97      albertel  589: 	  if ($token->[0] eq 'S') {
                    590: 	    $currentstring = &Apache::edit::tag_start($target,$token);
                    591: 	  } elsif ($token->[0] eq 'E') {
                    592: 	    $currentstring = &Apache::edit::tag_end($target,$token);
                    593: 	  }
                    594: 	} elsif ($target eq 'modified') {
                    595: 	  if ($token->[0] eq 'S') {
                    596: 	    $currentstring = $token->[4];
                    597: 	    $currentstring.=&Apache::edit::handle_insert();
1.210     www       598: 	  } elsif ($token->[0] eq 'E') {
                    599: 	    $currentstring = $token->[2];
                    600:             $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
1.97      albertel  601: 	  } else {
                    602: 	    $currentstring = $token->[2];
                    603: 	  }
1.72      albertel  604: 	}
                    605:       }
1.7       albertel  606:     }
                    607:     use strict 'refs';
                    608:   }
                    609:   return $currentstring;
1.82      ng        610: }
                    611: 
1.96      albertel  612: sub setup_globals {
1.172     albertel  613:   my ($request,$target)=@_;
                    614:   $Apache::lonxml::request=$request;
1.99      albertel  615:   $Apache::lonxml::registered = 0;
1.325     www       616:   @Apache::lonxml::htmlareafields=();
1.205     www       617:   $errorcount=0;
                    618:   $warningcount=0;
1.207     albertel  619:   $Apache::lonxml::default_homework_loaded=0;
1.212     albertel  620:   $Apache::lonxml::usestyle=1;
1.204     albertel  621:   &init_counter();
1.101     albertel  622:   @Apache::lonxml::pwd=();
1.124     albertel  623:   @Apache::lonxml::extlinks=();
1.281     albertel  624:   @Apache::lonxml::ssi_info=();
1.282     albertel  625:   $Apache::lonxml::post_evaluate=1;
1.295     albertel  626:   $Apache::lonxml::warnings_error_header='';
1.96      albertel  627:   if ($target eq 'meta') {
                    628:     $Apache::lonxml::redirection = 0;
                    629:     $Apache::lonxml::metamode = 1;
                    630:     $Apache::lonxml::evaluate = 1;
                    631:     $Apache::lonxml::import = 0;
1.129     albertel  632:   } elsif ($target eq 'answer') {
                    633:     $Apache::lonxml::redirection = 0;
                    634:     $Apache::lonxml::metamode = 1;
                    635:     $Apache::lonxml::evaluate = 1;
                    636:     $Apache::lonxml::import = 1;
1.96      albertel  637:   } elsif ($target eq 'grade') {
                    638:     &startredirection;
                    639:     $Apache::lonxml::metamode = 0;
                    640:     $Apache::lonxml::evaluate = 1;
                    641:     $Apache::lonxml::import = 1;
                    642:   } elsif ($target eq 'modified') {
                    643:     $Apache::lonxml::redirection = 0;
                    644:     $Apache::lonxml::metamode = 0;
                    645:     $Apache::lonxml::evaluate = 0;
                    646:     $Apache::lonxml::import = 0;
                    647:   } elsif ($target eq 'edit') {
                    648:     $Apache::lonxml::redirection = 0;
                    649:     $Apache::lonxml::metamode = 0;
                    650:     $Apache::lonxml::evaluate = 0;
                    651:     $Apache::lonxml::import = 0;
1.163     albertel  652:   } elsif ($target eq 'analyze') {
                    653:     $Apache::lonxml::redirection = 0;
                    654:     $Apache::lonxml::metamode = 0;
                    655:     $Apache::lonxml::evaluate = 1;
                    656:     $Apache::lonxml::import = 1;
1.96      albertel  657:   } else {
                    658:     $Apache::lonxml::redirection = 0;
                    659:     $Apache::lonxml::metamode = 0;
                    660:     $Apache::lonxml::evaluate = 1;
                    661:     $Apache::lonxml::import = 1;
                    662:   }
                    663: }
                    664: 
1.82      ng        665: sub init_safespace {
                    666:   my ($target,$safeeval,$safehole,$safeinit) = @_;
                    667:   $safeeval->permit("entereval");
                    668:   $safeeval->permit(":base_math");
                    669:   $safeeval->permit("sort");
1.286     albertel  670:   $safeeval->permit("time");
1.371     albertel  671:   $safeeval->deny("rand");
                    672:   $safeeval->deny("srand");
1.82      ng        673:   $safeeval->deny(":base_io");
1.102     albertel  674:   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
1.251     albertel  675:   $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
1.82      ng        676:   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
1.324     albertel  677:   $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
                    678: 		  '&chem_standard_order');
1.369     albertel  679:   $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
1.324     albertel  680: 
1.82      ng        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');
1.305     albertel  752:   $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
1.311     albertel  753:   $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
1.322     albertel  754:   $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
1.91      ng        755: 
1.82      ng        756: #need to inspect this class of ops
                    757: # $safeeval->deny(":base_orig");
1.331     albertel  758:   $safeeval->permit("require");
1.91      ng        759:   $safeinit .= ';$external::target="'.$target.'";';
1.82      ng        760:   &Apache::run::run($safeinit,$safeeval);
1.373     albertel  761:   &initialize_rndseed($safeeval);
                    762: }
1.303     albertel  763: 
1.373     albertel  764: sub initialize_rndseed {
                    765:     my ($safeeval)=@_;
                    766:     my $rndseed;
                    767:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
                    768:     $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
                    769:     my $safeinit = '$external::randomseed="'.$rndseed.'";';
                    770:     &Apache::lonxml::debug("Setting rndseed to $rndseed");
                    771:     &Apache::run::run($safeinit,$safeeval);
1.207     albertel  772: }
                    773: 
                    774: sub default_homework_load {
                    775:     my ($safeeval)=@_;
                    776:     &Apache::lonxml::debug('Loading default_homework');
                    777:     my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
1.241     albertel  778:     if ($default eq -1) {
1.207     albertel  779: 	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
                    780:     } else {
                    781: 	&Apache::run::run($default,$safeeval);
                    782: 	$Apache::lonxml::default_homework_loaded=1;
                    783:     }
1.17      albertel  784: }
                    785: 
1.358     albertel  786: {
                    787:     my $alarm_depth;
                    788:     sub init_alarm {
                    789: 	alarm(0);
                    790: 	$alarm_depth=0;
                    791:     }
                    792: 
                    793:     sub start_alarm {
                    794: 	if ($alarm_depth<1) {
                    795: 	    my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
                    796: 	    if ($old) {
                    797: 		&Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
                    798: 	    }
                    799: 	}
                    800: 	$alarm_depth++;
                    801:     }
                    802: 
                    803:     sub end_alarm {
                    804: 	$alarm_depth--;
                    805: 	if ($alarm_depth<1) { alarm(0); }
                    806:     }
                    807: }
1.328     albertel  808: my $metamode_was;
1.55      albertel  809: sub startredirection {
1.328     albertel  810:     if (!$Apache::lonxml::redirection) {
                    811: 	$metamode_was=$Apache::lonxml::metamode;
                    812:     }
                    813:     $Apache::lonxml::metamode=0;
                    814:     $Apache::lonxml::redirection++;
                    815:     push (@Apache::lonxml::outputstack, '');
1.55      albertel  816: }
                    817: 
                    818: sub endredirection {
1.328     albertel  819:     if (!$Apache::lonxml::redirection) {
                    820: 	&Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
                    821: 	return '';
                    822:     }
                    823:     $Apache::lonxml::redirection--;
                    824:     if (!$Apache::lonxml::redirection) {
                    825: 	$Apache::lonxml::metamode=$metamode_was;
                    826:     }
                    827:     pop @Apache::lonxml::outputstack;
1.97      albertel  828: }
                    829: 
                    830: sub end_tag {
                    831:   my ($tagstack,$parstack,$token)=@_;
                    832:   pop(@$tagstack);
                    833:   pop(@$parstack);
                    834:   &decreasedepth($token);
1.55      albertel  835: }
                    836: 
1.17      albertel  837: sub initdepth {
                    838:   @Apache::lonxml::depthcounter=();
                    839:   $Apache::lonxml::depth=-1;
                    840:   $Apache::lonxml::olddepth=-1;
                    841: }
                    842: 
1.339     albertel  843: my @timers;
                    844: my $lasttime;
1.17      albertel  845: sub increasedepth {
1.19      albertel  846:   my ($token) = @_;
1.17      albertel  847:   $Apache::lonxml::depth++;
                    848:   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
                    849:   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
                    850:     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
                    851:   }
1.340     albertel  852:   my $time;
                    853:   if ($Apache::lonxml::debug eq "1") {
                    854:       push(@timers,[&gettimeofday()]);
                    855:       $time=&tv_interval($lasttime);
                    856:       $lasttime=[&gettimeofday()];
                    857:   }
1.339     albertel  858:   my $spacing='  'x($Apache::lonxml::depth-1);
1.42      albertel  859:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.339     albertel  860:   &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : \n");
1.54      albertel  861: #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
1.17      albertel  862: }
                    863: 
                    864: sub decreasedepth {
1.19      albertel  865:   my ($token) = @_;
1.17      albertel  866:   $Apache::lonxml::depth--;
1.36      albertel  867:   if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
                    868:     $#Apache::lonxml::depthcounter--;
                    869:     $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
                    870:   }
1.43      albertel  871:   if (  $Apache::lonxml::depth < -1) {
1.280     www       872:     &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
1.43      albertel  873:     $Apache::lonxml::depth='-1';
                    874:   }
1.340     albertel  875:   my ($timer,$time);
                    876:   if ($Apache::lonxml::debug eq "1") {
                    877:       $timer=pop(@timers);
                    878:       $time=&tv_interval($lasttime);
                    879:       $lasttime=[&gettimeofday()];
                    880:   }
1.339     albertel  881:   my $spacing='  'x$Apache::lonxml::depth;
1.42      albertel  882:   my $curdepth=join('_',@Apache::lonxml::depthcounter);
1.339     albertel  883:   &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1] : $time : ".&tv_interval($timer)."\n");
1.54      albertel  884: #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
1.1       sakharuk  885: }
1.19      albertel  886: 
1.180     albertel  887: sub get_all_text_unbalanced {
1.190     albertel  888: #there is a copy of this in lonpublisher.pm
1.326     albertel  889:     my($tag,$pars)= @_;
                    890:     my $token;
                    891:     my $result='';
                    892:     $tag='<'.$tag.'>';
                    893:     while ($token = $$pars[-1]->get_token) {
                    894: 	if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    895: 	    $result.=$token->[1];
                    896: 	} elsif ($token->[0] eq 'PI') {
                    897: 	    $result.=$token->[2];
                    898: 	} elsif ($token->[0] eq 'S') {
                    899: 	    $result.=$token->[4];
                    900: 	} elsif ($token->[0] eq 'E')  {
                    901: 	    $result.=$token->[2];
                    902: 	}
                    903: 	if ($result =~ /\Q$tag\E/is) {
                    904: 	    ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
                    905: 	    #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
                    906: 	    #&Apache::lonxml::debug('Result is :'.$1);
                    907: 	    $redo=$tag.$redo;
                    908: 	    &Apache::lonxml::newparser($pars,\$redo);
                    909: 	    last;
                    910: 	}
                    911:     }
                    912:     return $result
1.204     albertel  913: }
                    914: 
                    915: sub increment_counter {
1.247     albertel  916:     my ($increment) = @_;
1.289     sakharuk  917:     if (defined($increment) && $increment gt 0) {
                    918: 	$Apache::lonxml::counter+=$increment;
                    919:     } else {
                    920: 	$Apache::lonxml::counter++;
1.247     albertel  921:     }
1.289     sakharuk  922:     $Apache::lonxml::counter_changed=1;
1.204     albertel  923: }
                    924: 
                    925: sub init_counter {
1.372     albertel  926:     if (defined($env{'form.counter'})) {
                    927: 	$Apache::lonxml::counter=$env{'form.counter'};
1.247     albertel  928: 	$Apache::lonxml::counter_changed=0;
1.237     sakharuk  929:     } else {
1.204     albertel  930: 	$Apache::lonxml::counter=1;
1.247     albertel  931: 	$Apache::lonxml::counter_changed=1;
1.204     albertel  932:     }
                    933: }
                    934: 
                    935: sub store_counter {
                    936:     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
                    937:     return '';
1.180     albertel  938: }
                    939: 
1.19      albertel  940: sub get_all_text {
1.270     albertel  941:     my($tag,$pars,$style)= @_;
                    942:     my $gotfullstack=1;
                    943:     if (ref($pars) ne 'ARRAY') {
                    944: 	$gotfullstack=0;
                    945: 	$pars=[$pars];
                    946:     }
                    947:     if (ref($style) ne 'HASH') {
                    948: 	$style={};
                    949:     }
                    950:     my $depth=0;
                    951:     my $token;
                    952:     my $result='';
                    953:     if ( $tag =~ m:^/: ) { 
                    954: 	my $tag=substr($tag,1); 
                    955: 	#&Apache::lonxml::debug("have:$tag:");
                    956: 	my $top_empty=0;
                    957: 	while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
                    958: 	    while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
                    959: 		#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
                    960: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
                    961: 		    $result.=$token->[1];
                    962: 		} elsif ($token->[0] eq 'PI') {
                    963: 		    $result.=$token->[2];
                    964: 		} elsif ($token->[0] eq 'S') {
1.316     albertel  965: 		    if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
                    966: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                    967: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel  968: 		    $result.=$token->[4];
                    969: 		} elsif ($token->[0] eq 'E')  {
1.316     albertel  970: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
1.270     albertel  971: 		    #skip sending back the last end tag
1.283     albertel  972: 		    if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
1.270     albertel  973: 			my $string=
                    974: 			    '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
                    975: 				$$style{'/'.$token->[1]}.
                    976: 				    $token->[2].
                    977: 					'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
                    978: 			&Apache::lonxml::newparser($pars,\$string);
                    979: 			#&Apache::lonxml::debug("reParsing $string");
                    980: 			next;
                    981: 		    }
                    982: 		    if ($depth > -1) {
                    983: 			$result.=$token->[2];
                    984: 		    } else {
                    985: 			$$pars[-1]->unget_token($token);
                    986: 		    }
                    987: 		}
                    988: 	    }
                    989: 	    if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
                    990: 	    if (($depth >=0) && ($#$pars > 0) ) {
                    991: 		pop(@$pars);
                    992: 		pop(@Apache::lonxml::pwd);
                    993: 	    }
                    994: 	}
                    995: 	if ($top_empty && $depth >= 0) {
                    996: 	    #never found the end tag ran out of text, throw error send back blank
                    997: 	    &error('Never found end tag for &lt;'.$tag.
                    998: 		   '&gt; current string <pre>'.
1.314     albertel  999: 		   &HTML::Entities::encode($result,'<>&"').
1.270     albertel 1000: 		   '</pre>');
                   1001: 	    if ($gotfullstack) {
                   1002: 		my $newstring='</'.$tag.'>'.$result;
                   1003: 		&Apache::lonxml::newparser($pars,\$newstring);
                   1004: 	    }
                   1005: 	    $result='';
                   1006: 	}
                   1007:     } else {
                   1008: 	while ($#$pars > -1) {
                   1009: 	    while ($token = $$pars[-1]->get_token) {
                   1010: 		#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
                   1011: 		if (($token->[0] eq 'T')||($token->[0] eq 'C')||
                   1012: 		    ($token->[0] eq 'D')) {
                   1013: 		    $result.=$token->[1];
                   1014: 		} elsif ($token->[0] eq 'PI') {
                   1015: 		    $result.=$token->[2];
                   1016: 		} elsif ($token->[0] eq 'S') {
1.316     albertel 1017: 		    if ( $token->[1] =~ /^\Q$tag\E$/i) {
1.270     albertel 1018: 			$$pars[-1]->unget_token($token); last;
                   1019: 		    } else {
                   1020: 			$result.=$token->[4];
                   1021: 		    }
1.316     albertel 1022: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
                   1023: 		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
1.270     albertel 1024: 		} elsif ($token->[0] eq 'E')  {
                   1025: 		    $result.=$token->[2];
                   1026: 		}
                   1027: 	    }
                   1028: 	    if (($#$pars > 0) ) {
                   1029: 		pop(@$pars);
                   1030: 		pop(@Apache::lonxml::pwd);
                   1031: 	    } else { last; }
                   1032: 	}
                   1033:     }
                   1034:     #&Apache::lonxml::debug("Exit:$result:");
                   1035:     return $result
1.19      albertel 1036: }
                   1037: 
1.23      albertel 1038: sub newparser {
                   1039:   my ($parser,$contentref,$dir) = @_;
1.167     albertel 1040:   push (@$parser,HTML::LCParser->new($contentref));
1.365     albertel 1041:   $$parser[-1]->xml_mode(1);
                   1042:   $$parser[-1]->marked_sections(1);
1.23      albertel 1043:   if ( $dir eq '' ) {
                   1044:     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
                   1045:   } else {
                   1046:     push (@Apache::lonxml::pwd, $dir);
                   1047:   } 
                   1048: }
1.1       sakharuk 1049: 
1.8       albertel 1050: sub parstring {
                   1051:   my ($token) = @_;
                   1052:   my $temp='';
1.142     albertel 1053:   foreach (@{$token->[3]}) {
1.35      www      1054:     unless ($_=~/\W/) {
1.42      albertel 1055:       my $val=$token->[2]->{$_};
1.231     albertel 1056:       $val =~ s/([\%\@\\\"\'])/\\$1/g;
1.342     albertel 1057:       $val =~ s/(\$[^{a-zA-Z_])/\\$1/g;
1.346     albertel 1058:       $val =~ s/(\$)$/\\$1/;
1.51      albertel 1059:       #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
1.267     sakharuk 1060:       $temp .= "my \$$_=\"$val\";";
1.20      albertel 1061:     }
1.142     albertel 1062:   }
1.8       albertel 1063:   return $temp;
                   1064: }
1.22      albertel 1065: 
1.34      www      1066: sub writeallows {
1.126     www      1067:     unless ($#extlinks>=0) { return; }
1.34      www      1068:     my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
1.372     albertel 1069:     if ($env{'httpref.'.$thisurl}) {
                   1070: 	$thisurl=$env{'httpref.'.$thisurl};
1.111     www      1071:     }
1.34      www      1072:     my $thisdir=$thisurl;
                   1073:     $thisdir=~s/\/[^\/]+$//;
                   1074:     my %httpref=();
1.142     albertel 1075:     foreach (@extlinks) {
1.34      www      1076:        $httpref{'httpref.'.
1.125     www      1077:  	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
1.142     albertel 1078:     }
1.126     www      1079:     @extlinks=();
1.34      www      1080:     &Apache::lonnet::appenv(%httpref);
                   1081: }
                   1082: 
1.281     albertel 1083: sub register_ssi {
                   1084:     my ($url,%form)=@_;
                   1085:     push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
                   1086:     return '';
                   1087: }
                   1088: 
                   1089: sub do_registered_ssi {
                   1090:     foreach my $info (@Apache::lonxml::ssi_info) {
                   1091: 	my %form=%{ $info->{'form'}};
                   1092: 	my $url=$info->{'url'};
                   1093: 	&Apache::lonnet::ssi($url,%form);
                   1094:     }
                   1095: }
1.66      www      1096: #
                   1097: # Afterburner handles anchors, highlights and links
                   1098: #
                   1099: sub afterburn {
                   1100:     my $result=shift;
1.154     albertel 1101:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                   1102: 					    ['highlight','anchor','link']);
1.372     albertel 1103:     if ($env{'form.highlight'}) {
                   1104:        foreach (split(/\,/,$env{'form.highlight'})) {
1.66      www      1105:            my $anchorname=$_;
                   1106: 	   my $matchthis=$anchorname;
                   1107:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1108:            $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
1.142     albertel 1109:        }
1.66      www      1110:     }
1.372     albertel 1111:     if ($env{'form.link'}) {
                   1112:        foreach (split(/\,/,$env{'form.link'})) {
1.66      www      1113:            my ($anchorname,$linkurl)=split(/\>/,$_);
                   1114: 	   my $matchthis=$anchorname;
                   1115:            $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1116:            $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
1.142     albertel 1117:        }
1.66      www      1118:     }
1.372     albertel 1119:     if ($env{'form.anchor'}) {
                   1120:         my $anchorname=$env{'form.anchor'};
1.66      www      1121: 	my $matchthis=$anchorname;
                   1122:         $matchthis=~s/\_+/\\s\+/g;
1.317     albertel 1123:         $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
1.66      www      1124:         $result.=(<<"ENDSCRIPT");
1.226     albertel 1125: <script type="text/javascript">
1.66      www      1126:     document.location.hash='$anchorname';
                   1127: </script>
                   1128: ENDSCRIPT
                   1129:     }
                   1130:     return $result;
                   1131: }
                   1132: 
1.79      www      1133: sub storefile {
                   1134:     my ($file,$contents)=@_;
1.290     albertel 1135:     &Apache::lonnet::correct_line_ends(\$contents);
1.79      www      1136:     if (my $fh=Apache::File->new('>'.$file)) {
                   1137: 	print $fh $contents;
                   1138:         $fh->close();
1.271     www      1139:         return 1;
1.147     albertel 1140:     } else {
1.271     www      1141: 	&warning("Unable to save file $file");
                   1142: 	return 0;
1.79      www      1143:     }
                   1144: }
                   1145: 
1.151     albertel 1146: sub createnewhtml {
1.321     www      1147:     my $title=&mt('Title of document goes here');
                   1148:     my $body=&mt('Body of document goes here');
                   1149:     my $filecontents=(<<SIMPLECONTENT);
                   1150: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml/11/DTD/xhtml11.dtd">
1.78      www      1151: <html>
                   1152: <head>
1.321     www      1153: <title>$title</title>
1.78      www      1154: </head>
                   1155: <body bgcolor="#FFFFFF">
1.321     www      1156: $body
1.78      www      1157: </body>
                   1158: </html>
                   1159: SIMPLECONTENT
1.321     www      1160:     return $filecontents;
1.151     albertel 1161: }
                   1162: 
1.274     albertel 1163: sub createnewsty {
                   1164:   my $filecontents=(<<SIMPLECONTENT);
                   1165: <definetag name="">
                   1166:     <render>
                   1167:        <web></web>
                   1168:        <tex></tex>
                   1169:     </render>
                   1170: </definetag>
                   1171: SIMPLECONTENT
                   1172:   return $filecontents;
                   1173: }
                   1174: 
1.147     albertel 1175: 
1.151     albertel 1176: sub inserteditinfo {
1.274     albertel 1177:       my ($result,$filecontents,$filetype)=@_;
1.314     albertel 1178:       $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
1.147     albertel 1179: #      my $editheader='<a href="#editsection">Edit below</a><hr />';
1.274     albertel 1180:       my $xml_help = '';
1.321     www      1181:       my $initialize='';
1.274     albertel 1182:       if ($filetype eq 'html') {
1.323     www      1183: 	  my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
1.333     www      1184: 	  $initialize=&Apache::lonhtmlcommon::htmlareaheaders().
1.347     albertel 1185: 	      &Apache::lonhtmlcommon::spellheader();
                   1186: 	  if (!&Apache::lonhtmlcommon::htmlareablocked() &&
                   1187: 	      &Apache::lonhtmlcommon::htmlareabrowser()) {
                   1188: 	      $initialize.=(<<FULLPAGE);
1.321     www      1189: <script type="text/javascript">
1.323     www      1190: $addbuttons
                   1191: 
1.321     www      1192:     HTMLArea.loadPlugin("FullPage");
                   1193: 
                   1194:     function initDocument() {
1.323     www      1195: 	var editor=new HTMLArea("filecont",config);
1.321     www      1196: 	editor.registerPlugin(FullPage);
                   1197: 	editor.generate();
                   1198:     }
                   1199: </script>
                   1200: FULLPAGE
1.347     albertel 1201:           } else {
                   1202: 	      $initialize.=(<<FULLPAGE);
                   1203: <script type="text/javascript">
                   1204: $addbuttons
                   1205:     function initDocument() {
                   1206:     }
                   1207: </script>
                   1208: FULLPAGE
                   1209: 	  }
1.321     www      1210:           $result=~s/\<body([^\>]*)\>/\<body onload="initDocument()" $1\>/i;
                   1211: 	  $xml_help=&Apache::loncommon::helpLatexCheatsheet();
1.274     albertel 1212:       }
                   1213:       my $cleanbut = '';
1.374   ! www      1214: 
1.254     albertel 1215:       my $titledisplay=&display_title();
1.280     www      1216:       my %lt=&Apache::lonlocal::texthash('st' => 'Save this',
                   1217: 					 'vi' => 'View',
                   1218: 					 'ed' => 'Edit');
1.161     albertel 1219:       my $buttons=(<<BUTTONS);
1.274     albertel 1220: $cleanbut
1.304     matthew  1221: <input type="submit" name="savethisfile" accesskey="s"  value="$lt{'st'}" />
                   1222: <input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
1.161     albertel 1223: BUTTONS
1.333     www      1224:       $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
1.338     albertel 1225:       $buttons.=&Apache::lonhtmlcommon::htmlareaselectactive('filecont');
1.78      www      1226:       my $editfooter=(<<ENDFOOTER);
1.321     www      1227: $initialize
1.78      www      1228: <hr />
                   1229: <a name="editsection" />
1.333     www      1230: <form method="post" name="xmledit">
1.240     albertel 1231: $xml_help
1.280     www      1232: <input type="hidden" name="editmode" value="$lt{'ed'}" />
1.170     www      1233: $buttons<br />
1.366     albertel 1234: <textarea style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
1.170     www      1235: <br />$buttons
1.78      www      1236: <br />
                   1237: </form>
1.254     albertel 1238: $titledisplay
1.321     www      1239: </body>
1.78      www      1240: ENDFOOTER
1.147     albertel 1241: #      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
1.78      www      1242:       $result=~s/(\<\/body\>)/$editfooter/is;
                   1243:       return $result;
                   1244: }
                   1245: 
1.152     albertel 1246: sub get_target {
1.372     albertel 1247:   my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
                   1248:   if ( $env{'request.state'} eq 'published') {
                   1249:     if ( defined($env{'form.grade_target'})
1.152     albertel 1250: 	 && ($viewgrades == 'F' )) {
1.372     albertel 1251:       return ($env{'form.grade_target'});
                   1252:     } elsif (defined($env{'form.grade_target'})) {
                   1253:       if (($env{'form.grade_target'} eq 'web') ||
                   1254: 	  ($env{'form.grade_target'} eq 'tex') ) {
                   1255: 	return $env{'form.grade_target'}
1.153     albertel 1256:       } else {
                   1257: 	return 'web';
                   1258:       }
1.152     albertel 1259:     } else {
                   1260:       return 'web';
                   1261:     }
1.372     albertel 1262:   } elsif ($env{'request.state'} eq 'construct') {
                   1263:     if ( defined($env{'form.grade_target'})) {
                   1264:       return ($env{'form.grade_target'});
1.152     albertel 1265:     } else {
                   1266:       return 'web';
                   1267:     }
                   1268:   } else {
                   1269:     return 'web';
                   1270:   }
                   1271: }
                   1272: 
1.24      sakharuk 1273: sub handler {
1.255     sakharuk 1274:     my $request=shift;
                   1275:     
                   1276:     my $target=&get_target();
                   1277:     
1.372     albertel 1278:     $Apache::lonxml::debug=$env{'user.debug'};
1.255     sakharuk 1279:     
1.364     albertel 1280:     &Apache::loncommon::content_type($request,'text/html');
1.255     sakharuk 1281:     &Apache::loncommon::no_cache($request);
1.372     albertel 1282:     if ($env{'request.state'} eq 'published') {
1.363     albertel 1283: 	$request->set_last_modified(&Apache::lonnet::metadata($request->uri,
                   1284: 							      'lastrevisiondate'));
                   1285:     }
1.255     sakharuk 1286:     $request->send_http_header;
                   1287:     
                   1288:     return OK if $request->header_only;
1.68      www      1289: 
                   1290: 
1.255     sakharuk 1291:     my $file=&Apache::lonnet::filelocation("",$request->uri);
1.274     albertel 1292:     my $filetype;
                   1293:     if ($file =~ /\.sty$/) {
                   1294: 	$filetype='sty';
                   1295:     } else {
                   1296: 	$filetype='html';
                   1297:     }
1.78      www      1298: #
                   1299: # Edit action? Save file.
                   1300: #
1.372     albertel 1301:     unless ($env{'request.state'} eq 'published') {
1.374   ! www      1302: 	if ($env{'form.savethisfile'}) {
1.372     albertel 1303: 	    if (&storefile($file,$env{'form.filecont'})) {
1.309     albertel 1304: 		&Apache::lonxml::info("<font COLOR=\"#0000FF\">".
                   1305: 				      &mt('Updated').": ".
                   1306: 				      &Apache::lonlocal::locallocaltime(time).
                   1307: 				      " </font>");
1.271     www      1308: 	    } 
1.255     sakharuk 1309: 	}
                   1310:     }
                   1311:     my %mystyle;
                   1312:     my $result = '';
                   1313:     my $filecontents=&Apache::lonnet::getfile($file);
                   1314:     if ($filecontents eq -1) {
1.284     www      1315: 	my $bodytag=&Apache::loncommon::bodytag('File Error');
                   1316: 	my $fnf=&mt('File not found');
1.255     sakharuk 1317: 	$result=(<<ENDNOTFOUND);
1.78      www      1318: <html>
                   1319: <head>
1.284     www      1320: <title>$fnf</title>
1.78      www      1321: </head>
1.284     www      1322: $bodytag
                   1323: <b>$fnf: $file</b>
1.78      www      1324: </body>
                   1325: </html>
                   1326: ENDNOTFOUND
1.343     albertel 1327:         $filecontents='';
1.372     albertel 1328: 	if ($env{'request.state'} ne 'published') {
1.274     albertel 1329: 	    if ($filetype eq 'sty') {
                   1330: 		$filecontents=&createnewsty();
                   1331: 	    } else {
                   1332: 		$filecontents=&createnewhtml();
                   1333: 	    }
1.372     albertel 1334: 	    $env{'form.editmode'}='Edit'; #force edit mode
1.255     sakharuk 1335: 	}
                   1336:     } else {
1.372     albertel 1337: 	unless ($env{'request.state'} eq 'published') {
1.343     albertel 1338: 	    if ($filecontents=~/BEGIN LON-CAPA Internal/) {
                   1339: 		&Apache::lonxml::error(&mt('This file appears to be a rendering of a Lon-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
                   1340: 	    }
1.264     www      1341: #
                   1342: # we are in construction space, see if edit mode forced
                   1343:             &Apache::loncommon::get_unprocessed_cgi
                   1344:                           ($ENV{'QUERY_STRING'},['editmode']);
1.255     sakharuk 1345: 	}
1.372     albertel 1346: 	if (!$env{'form.editmode'} || $env{'form.viewmode'}) {
1.255     sakharuk 1347: 	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
                   1348: 						'',%mystyle);
1.368     albertel 1349: 	    undef($Apache::lonhomework::parsing_a_task);
1.255     sakharuk 1350: 	}
1.147     albertel 1351:     }
1.255     sakharuk 1352:     
1.78      www      1353: #
                   1354: # Edit action? Insert editing commands
                   1355: #
1.372     albertel 1356:     unless ($env{'request.state'} eq 'published') {
                   1357: 	if ($env{'form.editmode'} && (!($env{'form.viewmode'}))) {
1.255     sakharuk 1358: 	    my $displayfile=$request->uri;
                   1359: 	    $displayfile=~s/^\/[^\/]*//;
1.349     albertel 1360: 	    my $bodytag='<body bgcolor="#FFFFFF">';
1.372     albertel 1361: 	    if ($env{'environment.remote'} eq 'off') {
1.349     albertel 1362: 		$bodytag=&Apache::loncommon::bodytag();
                   1363: 	    }
                   1364: 	    $result='<html>'.$bodytag.
1.309     albertel 1365: 		&Apache::lonxml::message_location().'<h3>'.
                   1366: 		$displayfile.
1.255     sakharuk 1367: 		'</h3></body></html>';
1.274     albertel 1368: 	    $result=&inserteditinfo($result,$filecontents,$filetype);
1.255     sakharuk 1369: 	}
1.147     albertel 1370:     }
1.274     albertel 1371:     if ($filetype eq 'html') { writeallows($request->uri); }
                   1372: 	
1.255     sakharuk 1373:     
1.309     albertel 1374:     &Apache::lonxml::add_messages(\$result);
1.255     sakharuk 1375:     $request->print($result);
                   1376:     
                   1377:     return OK;
1.253     albertel 1378: }
                   1379: 
                   1380: sub display_title {
                   1381:     my $result;
1.372     albertel 1382:     if ($env{'request.state'} eq 'construct') {
1.253     albertel 1383: 	my $title=&Apache::lonnet::gettitle();
                   1384: 	if (!defined($title) || $title eq '') {
1.372     albertel 1385: 	    $title = $env{'request.filename'};
1.253     albertel 1386: 	    $title = substr($title, rindex($title, '/') + 1);
                   1387: 	}
                   1388: 	$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
                   1389:     }
                   1390:     return $result;
1.24      sakharuk 1391: }
1.147     albertel 1392: 
1.22      albertel 1393: sub debug {
1.298     albertel 1394:     if ($Apache::lonxml::debug eq "1") {
                   1395: 	$|=1;
1.300     albertel 1396: 	my $request=$Apache::lonxml::request;
                   1397: 	if (!$request) { $request=Apache->request; }
1.314     albertel 1398: 	$request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
1.346     albertel 1399: 	#&Apache::lonnet::logthis($_[0]);
1.298     albertel 1400:     }
1.22      albertel 1401: }
1.49      albertel 1402: 
1.348     albertel 1403: sub show_error_warn_msg {
1.372     albertel 1404:     if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
                   1405: 	&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1.351     albertel 1406: 	return 1;
                   1407:     }
1.348     albertel 1408:     return (($Apache::lonxml::debug eq 1) ||
1.372     albertel 1409: 	    ($env{'request.state'} eq 'construct') ||
1.348     albertel 1410: 	    ($Apache::lonhomework::browse eq 'F'
                   1411: 	     &&
1.372     albertel 1412: 	     $env{'form.show_errors'} eq 'on'));
1.348     albertel 1413: }
                   1414: 
1.22      albertel 1415: sub error {
1.336     albertel 1416:     $errorcount++;
1.348     albertel 1417:     if ( &show_error_warn_msg() ) {
1.336     albertel 1418: 	# If printing in construction space, put the error inside <pre></pre>
                   1419: 	push(@Apache::lonxml::error_messages,
                   1420: 	     $Apache::lonxml::warnings_error_header.
                   1421: 	     "<b>ERROR:</b>".join("<br />\n",@_)."<br />\n");
                   1422: 	$Apache::lonxml::warnings_error_header='';
                   1423:     } else {
                   1424: 	my $errormsg;
                   1425: 	my ($symb)=&Apache::lonnet::symbread();
                   1426: 	if ( !$symb ) {
                   1427: 	    #public or browsers
                   1428: 	    $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
                   1429: 	} 
                   1430: 	#notify author
1.372     albertel 1431: 	&Apache::lonmsg::author_res_msg($env{'request.filename'},join('<br />',@_));
1.336     albertel 1432: 	#notify course
1.372     albertel 1433: 	if ( $symb && $env{'request.course.id'} ) {
1.336     albertel 1434: 	    my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
1.372     albertel 1435: 	    my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
1.336     albertel 1436: 	    my @userlist;
                   1437: 	    foreach (keys %users) {
                   1438: 		my ($user,$domain) = split(/:/, $_);
                   1439: 		push(@userlist,"$user\@$domain");
                   1440: 		&Apache::lonmsg::user_normal_msg($user,$domain,
                   1441: 						 "Error [$declutter]",join('<br />',@_));
                   1442: 	    }
1.372     albertel 1443: 	    if ($env{'request.role.adv'}) {
1.336     albertel 1444: 		$errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
                   1445: 	    } else {
                   1446: 		$errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
                   1447: 	    }
                   1448: 	}
                   1449: 	push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
1.52      albertel 1450:     }
1.22      albertel 1451: }
1.49      albertel 1452: 
1.22      albertel 1453: sub warning {
1.295     albertel 1454:     $warningcount++;
1.261     albertel 1455:   
1.372     albertel 1456:     if ($env{'form.grade_target'} ne 'tex') {
1.348     albertel 1457: 	if ( &show_error_warn_msg() ) {
1.300     albertel 1458: 	    my $request=$Apache::lonxml::request;
                   1459: 	    if (!$request) { $request=Apache->request; }
1.309     albertel 1460: 	    push(@Apache::lonxml::warning_messages,
                   1461: 		 $Apache::lonxml::warnings_error_header.
                   1462: 		 "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
1.295     albertel 1463: 	    $Apache::lonxml::warnings_error_header='';
                   1464: 	}
                   1465:     }
1.309     albertel 1466: }
                   1467: 
                   1468: sub info {
1.372     albertel 1469:     if ($env{'form.grade_target'} ne 'tex' 
                   1470: 	&& $env{'request.state'} eq 'construct') {
1.309     albertel 1471: 	push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
                   1472:     }
                   1473: }
                   1474: 
                   1475: sub message_location {
                   1476:     return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
                   1477: }
                   1478: 
                   1479: sub add_messages {
                   1480:     my ($msg)=@_;
                   1481:     my $result=join(' ',
                   1482: 		    @Apache::lonxml::info_messages,
                   1483: 		    @Apache::lonxml::error_messages,
                   1484: 		    @Apache::lonxml::warning_messages);
                   1485:     undef(@Apache::lonxml::info_messages);
                   1486:     undef(@Apache::lonxml::error_messages);
                   1487:     undef(@Apache::lonxml::warning_messages);
                   1488:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
                   1489:     $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
1.83      albertel 1490: }
                   1491: 
                   1492: sub get_param {
1.213     albertel 1493:     my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
                   1494:     if ( ! $context ) { $context = -1; }
                   1495:     my $args ='';
                   1496:     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1497:     if ( ! $Apache::lonxml::usestyle ) {
                   1498: 	$args=$Apache::lonxml::style_values.$args;
                   1499:     }
1.213     albertel 1500:     if ( ! $args ) { return undef; }
                   1501:     if ( $case_insensitive ) {
                   1502: 	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
                   1503: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1504:                                      $safeeval); #'
                   1505: 	} else {
                   1506: 	    return undef;
                   1507: 	}
                   1508:     } else {
                   1509: 	if ( $args =~ /my \$\Q$param\E=\"/ ) {
                   1510: 	    return &Apache::run::run("{$args;".'return $'.$param.'}',
                   1511:                                      $safeeval); #'
                   1512: 	} else {
                   1513: 	    return undef;
                   1514: 	}
                   1515:     }
1.22      albertel 1516: }
                   1517: 
1.132     albertel 1518: sub get_param_var {
1.213     albertel 1519:   my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
1.132     albertel 1520:   if ( ! $context ) { $context = -1; }
                   1521:   my $args ='';
                   1522:   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
1.297     sakharuk 1523:   if ( ! $Apache::lonxml::usestyle ) {
                   1524:       $args=$Apache::lonxml::style_values.$args;
                   1525:   }
1.230     albertel 1526:   &Apache::lonxml::debug("Args are $args param is $param");
1.213     albertel 1527:   if ($case_insensitive) {
                   1528:       if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {
                   1529: 	  return undef;
                   1530:       }
                   1531:   } elsif ( $args !~ /my \$\Q$param\E=\"/ ) { return undef; }
1.132     albertel 1532:   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
1.230     albertel 1533:   &Apache::lonxml::debug("first run is $value");
1.341     albertel 1534:   if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
1.230     albertel 1535:       &Apache::lonxml::debug("doing second");
                   1536:       my @result=&Apache::run::run("return $value",$safeeval,1);
                   1537:       if (!defined($result[0])) {
                   1538: 	  return $value
                   1539:       } else {
                   1540: 	  if (wantarray) { return @result; } else { return $result[0]; }
                   1541:       }
1.132     albertel 1542:   } else {
                   1543:     return $value;
                   1544:   }
                   1545: }
                   1546: 
1.74      albertel 1547: sub register_insert {
1.75      albertel 1548:   my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
1.74      albertel 1549:   my $i;
1.76      albertel 1550:   my $tagnum=0;
1.74      albertel 1551:   my @order;
                   1552:   for ($i=0;$i < $#data; $i++) {
                   1553:     my $line = $data[$i];
                   1554:     if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
                   1555:     if ( $line =~ /TABLE/ ) { last; }
1.268     bowersj2 1556:     my ($tag,$descrip,$color,$function,$show,$helpfile,$helpdesc) = split(/,/, $line);
1.135     albertel 1557:     if ($tag) {
                   1558:       $insertlist{"$tagnum.tag"} = $tag;
                   1559:       $insertlist{"$tagnum.description"} = $descrip;
                   1560:       $insertlist{"$tagnum.color"} = $color;
                   1561:       $insertlist{"$tagnum.function"} = $function;
                   1562:       if (!defined($show)) { $show='yes'; }
                   1563:       $insertlist{"$tagnum.show"}= $show;
1.268     bowersj2 1564:       $insertlist{"$tagnum.helpfile"} = $helpfile;
                   1565:       $insertlist{"$tagnum.helpdesc"} = $helpdesc;
1.135     albertel 1566:       $insertlist{"$tag.num"}=$tagnum;
                   1567:       $tagnum++;
                   1568:     }
1.74      albertel 1569:   }
1.76      albertel 1570:   $i++; #skipping TABLE line
                   1571:   $tagnum = 0;
1.74      albertel 1572:   for (;$i < $#data;$i++) {
                   1573:     my $line = $data[$i];
1.76      albertel 1574:     my ($mnemonic,@which) = split(/ +/,$line);
                   1575:     my $tag = $insertlist{"$tagnum.tag"};
1.144     matthew  1576:     for (my $j=0;$j <=$#which;$j++) {
1.74      albertel 1577:       if ( $which[$j] eq 'Y' ) {
1.76      albertel 1578: 	if ($insertlist{"$j.show"} ne 'no') {
                   1579: 	  push(@{ $insertlist{"$tag.which"} },$j);
                   1580: 	}
1.74      albertel 1581:       }
                   1582:     }
1.76      albertel 1583:     $tagnum++;
1.74      albertel 1584:   }
                   1585: }
1.98      albertel 1586: 
                   1587: sub description {
                   1588:   my ($token)=@_;
1.138     albertel 1589:   my $tagnum;
                   1590:   my $tag=$token->[1];
                   1591:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1592:     my $testtag=$namespace.'::'.$tag;
                   1593:     $tagnum=$insertlist{"$testtag.num"};
                   1594:     if (defined($tagnum)) { last; }
                   1595:   }
                   1596:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1597:   return $insertlist{$tagnum.'.description'};
1.268     bowersj2 1598: }
                   1599: 
                   1600: # Returns a list containing the help file, and the description
                   1601: sub helpinfo {
                   1602:   my ($token)=@_;
                   1603:   my $tagnum;
                   1604:   my $tag=$token->[1];
                   1605:   foreach my $namespace (reverse @Apache::lonxml::namespace) {
                   1606:     my $testtag=$namespace.'::'.$tag;
                   1607:     $tagnum=$insertlist{"$testtag.num"};
                   1608:     if (defined($tagnum)) { last; }
                   1609:   }
                   1610:   if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
                   1611:   return ($insertlist{$tagnum.'.helpfile'}, $insertlist{$tagnum.'.helpdesc'});
1.98      albertel 1612: }
1.123     albertel 1613: 
                   1614: # ----------------------------------------------------------------- whichuser
                   1615: # returns a list of $symb, $courseid, $domain, $name that is correct for
                   1616: # calls to lonnet functions for this setup.
                   1617: # - looks for form.grade_ parameters
                   1618: sub whichuser {
1.262     matthew  1619:   my ($passedsymb)=@_;
1.245     albertel 1620:   my ($symb,$courseid,$domain,$name,$publicuser);
1.372     albertel 1621:   if (defined($env{'form.grade_symb'})) {
1.350     albertel 1622:       my ($tmp_courseid)=
                   1623: 	  &Apache::loncommon::get_env_multiple('form.grade_courseid');
                   1624:       my $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid);
                   1625:       if (!$allowed && 
1.372     albertel 1626: 	  exists($env{'request.course.sec'}) && 
                   1627: 	  $env{'request.course.sec'} !~ /^\s*$/) {
1.350     albertel 1628: 	  $allowed=&Apache::lonnet::allowed('vgr',$tmp_courseid.
1.372     albertel 1629: 					    '/'.$env{'request.course.sec'});
1.350     albertel 1630:       }
                   1631:       if ($allowed) {
                   1632: 	  ($symb)=&Apache::loncommon::get_env_multiple('form.grade_symb');
                   1633: 	  $courseid=$tmp_courseid;
                   1634: 	  ($domain)=&Apache::loncommon::get_env_multiple('form.grade_domain');
                   1635: 	  ($name)=&Apache::loncommon::get_env_multiple('form.grade_username');
                   1636: 	  return ($symb,$courseid,$domain,$name,$publicuser);
                   1637:       }
                   1638:   }
                   1639:   if (!$passedsymb) {
                   1640:       $symb=&Apache::lonnet::symbread();
1.134     albertel 1641:   } else {
1.350     albertel 1642:       $symb=$passedsymb;
                   1643:   }
1.372     albertel 1644:   $courseid=$env{'request.course.id'};
                   1645:   $domain=$env{'user.domain'};
                   1646:   $name=$env{'user.name'};
1.350     albertel 1647:   if ($name eq 'public' && $domain eq 'public') {
1.372     albertel 1648:       if (!defined($env{'form.username'})) {
                   1649: 	  $env{'form.username'}.=time.rand(10000000);
1.244     albertel 1650:       }
1.372     albertel 1651:       $name.=$env{'form.username'};
1.123     albertel 1652:   }
1.245     albertel 1653:   return ($symb,$courseid,$domain,$name,$publicuser);
1.123     albertel 1654: }
                   1655: 
1.1       sakharuk 1656: 1;
                   1657: __END__
1.68      www      1658: 
                   1659: 

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