--- loncom/xml/scripttag.pm	2000/11/22 21:13:35	1.25
+++ loncom/xml/scripttag.pm	2003/02/24 23:32:32	1.86
@@ -1,193 +1,441 @@
 # The LearningOnline Network with CAPA
 # <script> definiton
+#
+# $Id: scripttag.pm,v 1.86 2003/02/24 23:32:32 albertel Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
+# 2/21 Guy
+# 8/20 Gerd Kortemeyer
 
-
-package Apache::scripttag; 
+package Apache::scripttag;
 
 use strict;
 use Apache::lonnet;
+use Apache::style;
 
-sub BEGIN {
-  &Apache::lonxml::register('Apache::scripttag',('script','scriptlib',
-						 'parserlib','import',
-                                                 'footnote','display'));
+#Globals
+# this used to pass around the standard callsub arguments to a tag func
+# so xmlparse can reenter the inner_xmlparse loop.
+
+@Apache::scripttag::parser_env = ();
+BEGIN {
+  &Apache::lonxml::register('Apache::scripttag',
+			    ('script','scriptlib','parserlib','import',
+			     'window','display','storetc','physnet',
+			     'standalone','comment',
+			     'LONCAPA_INTERNAL_TURN_STYLE_ON',
+			     'LONCAPA_INTERNAL_LONHTTPD_PORT'));
+}
+
+sub start_LONCAPA_INTERNAL_TURN_STYLE_ON {
+    $Apache::lonxml::usestyle=1;
+    return ('','no');
+}
+
+sub end_LONCAPA_INTERNAL_TURN_STYLE_ON {
+    return ('','no');
+}
+
+sub start_LONCAPA_INTERNAL_LONHTTPD_PORT {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    if ($target eq 'web') {
+	my $lonhttpdPort=$Apache::lonnet::perlvar{'lonhttpdPort'};
+	if (!defined($lonhttpdPort)) { $lonhttpdPort='8080'; }
+	return '<script type="text/javascript">var lonhttpdport=\''.
+	    $lonhttpdPort.'\';</script>';
+    }
+    return ('','no');
+}
+
+sub end_LONCAPA_INTERNAL_LONHTTPD_PORT {
+    return ('','no');
 }
 
 sub start_script {
-  my ($target,$token,$parstack,$parser,$safeeval)=@_;
-  my $args ='';
-  if ( $#$parstack > -1 ) {
-    $args=$$parstack[$#$parstack];
-  }
-  my $type = &Apache::run::run("{$args;".'return $type}',$safeeval);
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+  @Apache::scripttag::parser_env = @_;
   my $result='';
-  #&Apache::lonxml::debug("found type of $type");
+  my $type= &Apache::lonxml::get_param('type',$parstack,$safeeval);
+  &Apache::lonxml::debug("found type of $type");
   if ($type eq "loncapa/perl") {
-    my $bodytext=&Apache::lonxml::get_all_text("/script",$$parser[$#$parser]);
-    
+    my $bodytext=&Apache::lonxml::get_all_text("/script",$parser);
     if ( $target eq "modified" ) {
-    }
-    &Apache::run::run($bodytext,$safeeval);
-    
-    if ($target eq "edit" ) {
-      $result="<br> &lt;$token->[1]&gt; output: <br>$bodytext<br>Source:<br>";
-      $result.=&editfield($token->[1],$bodytext);
+      $result=$token->[4].&Apache::edit::modifiedfield();
+    } elsif ( $target eq 'web' || $target eq 'tex' ||
+	      $target eq 'grade' || $target eq 'answer' ||
+	      $target eq 'analyze' ) {
+	if (!$Apache::lonxml::default_homework_loaded) {
+	    &Apache::lonxml::default_homework_load($safeeval);
+	}
+	&Apache::run::run($bodytext,$safeeval);
+	if (($target eq 'answer') && ($Apache::lonhomework::viewgrades == 'F')) {
+	    $Apache::lonxml::evaluate--;
+	    $result.="<a href=\"javascript:newWindow=open(\'\',\'new_W\',\'width=500,height=200,scrollbars=1\');newWindow.document.open(\'text/html\',\'replace\');newWindow.document.writeln(\'&lt;html&gt;&lt;head&gt;&lt;title&gt;newwindow&lt;/title&gt;&lt;/head&gt;&lt;body bgcolor=&quot;#FFFFFF&quot;&gt;&lt;pre&gt;";
+	    my $listing= &HTML::Entities::encode(&Apache::run::dump($target,$safeeval));
+
+	    $result.=$listing;
+	    $result.= "&lt;/pre&gt;&lt;/body&gt;&lt;/html&gt;\');newWindow.document.close();void(0);\">Script Vars</a><br />";
+	}
+    } elsif ($target eq "edit" ) {
+      #&Apache::run::run($bodytext,$safeeval);
+      #$result="<br /> &lt;$token->[1]&gt; output: <br />$bodytext<br />Source:<br />";
+      $result=&Apache::edit::tag_start($target,$token,'Script');
+      $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4);
     }
   } else {
-    $result = $token->[4];
+    if ($target ne "meta") {
+      $result = $token->[4];
+      my $bodytext=&Apache::lonxml::get_all_text("/script",$parser);
+      $result.=$bodytext;
+    }
   }
   return $result;
 }
 
 sub end_script {
-  my ($target,$token,$parstack,$parser,$safeeval)=@_;
-#  return '';
-  return $token->[2]; 
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+  if ( $target eq "meta" ) { return ''; } 
+  my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
+  my $result='';
+  #other script blocks need to survive
+  if ($type ne "loncapa/perl") {
+    return $token->[2];
+  } elsif ($target eq 'edit' ) {
+    return &Apache::edit::end_table();
+  } elsif ($target eq 'answer') {
+    $Apache::lonxml::evaluate++;
+  }
+  return '';
 }
 
 sub start_display {
-  my ($target,$token,$parstack,$parser,$safeeval)=@_;
-  my $args ='';
-  if ( $#$parstack > -1 ) {
-    $args=$$parstack[$#$parstack];
-  }
-  my $bodytext=&Apache::lonxml::get_all_text("/display",$$parser[$#$parser]);
-  
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+
+  my $result;
+  my $bodytext=&Apache::lonxml::get_all_text("/display",$parser);
+
   if ( $target eq "modified" ) {
-  }
-  my $result=&Apache::run::run($bodytext,$safeeval);
-  
-  if ($target eq "edit" ) {
-    $result = 
-      "<br> &lt;$token->[1]&gt; output: <br>$bodytext<br>Source:<br>";
-    $result.=&editfield($token->[1],$bodytext);
+    $result=$token->[4].&Apache::edit::modifiedfield();
+  } elsif ( $target eq 'web' || $target eq 'tex' ||
+	    $target eq 'grade' || $target eq 'answer' ||
+	      $target eq 'analyze') {
+      if (!$Apache::lonxml::default_homework_loaded) {
+	  &Apache::lonxml::default_homework_load($safeeval);
+      }
+      $result=&Apache::run::run($bodytext,$safeeval);
+      if ($target eq 'grade' || $target eq 'answer' ||
+	  $target eq 'analyze') {
+	  $result=''; # grade should produce no output
+      }
+  } elsif ($target eq "edit" ) {
+    #$result = 
+    #  "<br /> &lt;$token->[1]&gt; output: <br />$bodytext<br />Source:<br />";
+    #$result.=&Apache::edit::editfield($token->[1],$bodytext,'',40,1);
+    $result=&Apache::edit::tag_start($target,$token,'Script With Display');
+    $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,1)
   }
   return $result;
 }
 
 sub end_display {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+  if ($target eq 'edit' ) { return &Apache::edit::end_table(); }
+  return '';
 }
 
 sub start_scriptlib {
-  my ($target,$token,$parstack,$parser,$safeeval)=@_;
-  my $bodytext=$$parser[$#$parser]->get_text("/scriptlib");
-  my $result ="";
-
-  $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
-				   $$parstack[$#$parstack]);
-  my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
-					     $bodytext);
-  my $script=&Apache::lonnet::getfile($location);
-  if ($script == -1) {
-    &Apache::lonxml::error("<b> Unable to find <i>$location</i> for scriptlib</b>");
-    return "";
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+  my $bodytext;
+  my $result ='';
+  my $error='';
+
+  if ($target eq 'web' || $target eq 'grade' || $target eq 'meta' || 
+      $target eq 'edit' || $target eq 'answer' || $target eq 'analyze') {
+    $bodytext=$$parser[$#$parser]->get_text("/scriptlib");
+    $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
+				     $$parstack[$#$parstack]);
+    my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
+					       $bodytext);
+    my $script=&Apache::lonnet::getfile($location);
+    if ($script == -1) {
+      if ($target eq 'edit') {
+        $error='</tr><tr><td>Errors</td><td colspan="2"><b> Unable to find <i>'.$location.'</i></b></td>'."\n";
+      } else {
+	&Apache::lonxml::error("<b> Unable to find <i>$location</i> for scriptlib</b>");
+	return "";
+      }
+    }
+    &Apache::run::run($script,$safeeval);
+    #&Apache::lonxml::debug("ran $bodytext:<br />".&Apache::lonnet::getfile($bodytext)."<br />");
   }
-  &Apache::run::run($script,$safeeval);
-  #&Apache::lonxml::debug("ran $bodytext:<br>".&Apache::lonnet::getfile($bodytext)."<br>");
-
   if ($target eq "edit" ) {
-    $result.=&editfield($token->[1],$bodytext);
+    $result=
+      &Apache::edit::tag_start($target,$token,'New Script Functions').
+	&Apache::edit::editline($token->[1],$bodytext,'scriptlib',40).
+            &Apache::edit::browse(undef,'textnode').
+	  $error.'</td></tr>'.
+	    &Apache::edit::end_table();
+  }
+  if ($target eq "modified" ) {
+    $bodytext=$$parser[$#$parser]->get_text("/scriptlib");
+    $result=$token->[4].&Apache::edit::modifiedfield($token);
+    &Apache::lonxml::debug($result);
   }
   return $result;
 }
 
-sub end_scriptlib {}
+sub end_scriptlib {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+  my @result;
+  if ($target eq "edit" ) { $result[1]='no'; }
+  return @result;
+}
 
 sub start_parserlib {
-  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
-  my $bodytext=$$parser[$#$parser]->get_text("/parserlib");
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+  my $bodytext;
   my $result ="";
-
-  $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
-				  $$parstack[$#$parstack]);
-  my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
-					     $bodytext);
-  my $styletext=&Apache::lonnet::getfile($location);
-  if ($styletext == -1) {
-    &Apache::lonxml::error("<b> Unable to find <i>$location</i> for parserlib</b>");
-    return "";
+  my $error='';
+  if ($target eq 'web' || $target eq 'grade' || $target eq 'meta' ||
+      $target eq 'edit' || $target eq 'answer' || $target eq 'analyze') {
+    $bodytext=$$parser[$#$parser]->get_text("/parserlib");
+    $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
+				     $$parstack[$#$parstack]);
+    my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
+					       $bodytext);
+    my $styletext=&Apache::lonnet::getfile($location);
+    #&Apache::lonxml::debug("found :$bodytext: in :$location: with :$styletext:");
+    if ($styletext == -1) {
+      if ($target eq 'edit') {
+	$error='</tr><tr><td>Errors</td><td colspan="2"><b> Unable to find <i>'.$location.'</i></b></td>'."\n";
+      } else {
+	&Apache::lonxml::error("<b> Unable to find <i>$location</i> for parserlib</b>");
+	return "";
+      }
+    }
+    %$style = ( %$style , &Apache::style::styleparser($target,$styletext));
   }
-  %$style = ( %$style , &Apache::style::styleparser($target,$styletext));
-
   if ($target eq "edit" ) {
-    $result=&editfield($token->[1],$bodytext);
+    $result=
+      &Apache::edit::tag_start($target,$token,'New Tag Definitions').
+	&Apache::edit::editline($token->[1],$bodytext,'',40).
+	  $error.'</td></tr>'.
+	    &Apache::edit::end_table();
+  }
+  if ($target eq "modified" ) {
+    $bodytext=$$parser[$#$parser]->get_text("/parserlib");
+    $result=$token->[4].&Apache::edit::modifiedfield($token);
+    &Apache::lonxml::debug($result);
   }
   return $result;
 }
 
 sub end_parserlib {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+  my @result;
+  if ($target eq "edit" ) { $result[1]='no'; }
+  return @result;
 }
 
-sub start_footnote {
-  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
+sub start_window {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $result = '';
-  $Apache::lonxml::redirection = 0;
+  if ($target eq 'web') {
+    &Apache::lonxml::startredirection;
+  }  elsif ($target eq 'tex') {
+       $result = '\unskip\footnote{';
+   }
   return $result;  
 }
 
-sub end_footnote {
-  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
-  $Apache::lonxml::outputstack =~ s/\"/\&quot\;/g;
-  my $result = "<a href=\"javascript:newWindow=open(\'\',\'new_W\',\'width=500,height=200\');newWindow.document.open(\'text/html\',\'replace\');newWindow.document.writeln(\'<html><head><title>newwindow</title></head><body bgcolor=&quot;#FFFFFF&quot;> $Apache::lonxml::outputstack </body></html>\');newWindow.document.close();void(0);\"><sup>*</sup></a>";
-   $Apache::lonxml::outputstack = "";
-   $Apache::lonxml::redirection = 1;
+sub end_window {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+  my $result;
+  if ($target eq 'web') {
+    my $output=&Apache::lonxml::endredirection;
+    $output =~ s/\"/\&quot\;/g;
+    $result = "<a href=\"javascript:newWindow=open(\'\',\'new_W\',\'width=500,height=200,scrollbars=1\');newWindow.document.open(\'text/html\',\'replace\');newWindow.document.writeln(\'<html><head><title>newwindow</title></head><body bgcolor=&quot;#FFFFFF&quot;> $output </body></html>\');newWindow.document.close();void(0);\"><sup>*</sup></a>";
+  } elsif ($target eq 'tex') {
+      $result = '}';
+  } else {
+      $result = '';
+  }
   return $result; 
 }
 
 sub start_import {
-  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $bodytext=$$parser[$#$parser]->get_text("/import");
   my $result ="";
 
   $bodytext=Apache::run::evaluate($bodytext,$safeeval,$$parstack[$#$parstack]);
-  my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
-  my $file=&Apache::lonnet::getfile($location);
-  if ($file == -1) {
-    &Apache::lonxml::error("<b> Unable to find <i>$bodytext $location</i> for import</b>");
-    return "";
-  }
 
-  my $dir=$location;
-  $dir=~s:/[^/]*$::;
-  &Apache::lonxml::newparser($parser,\$file,$dir);
+  if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
+      $target eq 'tex' || $target eq 'analyze' ) {
+    # FIXME this probably needs to be smart about construction vs.
+    # non construction space.
+    my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
+    my $file=&Apache::lonnet::getfile($location);
+    if ($file == -1) {
+      &Apache::lonxml::error("<b> Unable to find <i>$bodytext as $location</i> for import</b>");
+      return "";
+    }
 
-  if ($target eq "edit" ) {
-    $result.=&editfield($token->[1],$bodytext);
-    $result.="Click<a href=\"/res/$bodytext\">here</a> to edit<br></br>"
+    my $dir=$location;
+    $dir=~s:/[^/]*$::;
+    #  &Apache::lonxml::debug("directory $dir $location file $file \n<b>END</b>\n");
+    my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
+    if (!$id) { $id=$Apache::lonxml::curdepth; }
+    push(@Apache::inputtags::import,$id);
+    &Apache::lonxml::newparser($parser,\$file,$dir);
+  } elsif ($target eq "edit" ) {
+    $result.=&Apache::edit::tag_start($target,$token);
+    $result.=&Apache::edit::editline($token->[1],$bodytext,'',40);
+    $result.=&Apache::edit::browse(undef,'textnode');
+    #FIXME this need to convert $bodytext to be a contruction space reference
+    #my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
+    #$result.="Click<a href=\"$location\">here</a> to edit<br />"
+  } elsif ($target eq 'modified') {
+    $bodytext=$$parser[$#$parser]->get_text("/import");
+    $result=$token->[4].&Apache::edit::modifiedfield($token);
+    &Apache::lonxml::debug($result);
+  } elsif ($target eq 'meta') {
+    my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
+    $result.='<import part="'.$Apache::inputtags::part;
+    if ($id) {
+      $result.='" id="'.$id;
+    }
+    $result.='">';
+    $result.=$bodytext;
+    $result.='</import>';
   }
+  return $result;
 }
 
 sub end_import {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+  pop(@Apache::inputtags::import);
+  my $result;
+  if ($target eq 'edit' ) { $result=&Apache::edit::end_table(); }
+  return $result;
 }
 
-sub editfield {
-  my ($tag,$data)=@_;
-  
-  my $count=0;
-  my $maxlength=-1;
-  map { $count++;
-	if (length($_) > $maxlength) { $maxlength = length ($_); }
-      } split ("\n", $data);
-	  
-  return "<br></br>\n&lt;$tag&gt;<br></br>\n&nbsp;&nbsp;&nbsp;<textarea rows=\"$count\" cols=\"$maxlength\" name=homework_edit_".$Apache::lonxml::curdepth.">$data</textarea><br></br>\n&lt;/$tag&gt;<br></br>\n";
-}
-
-sub getfilenothere {
-  my ($filename) = @_;
-  my $a="";
-  
-  $filename=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
-  $filename="/home/httpd/html/res".$filename;
-  if (! -e $filename ) {
-    &Apache::lonnet::subscribe($filename);
-    &Apache::lonnet::repcopy($filename);
-  }
-  if (! -e $filename ) { return -1; };
-  my $fh=Apache::File->new($filename);
-  while (<$fh>) {
-      $a .=$_;
+sub start_storetc {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+  my $result = '';
+  &Apache::lonxml::startredirection;
+  return $result; 
+}
+
+sub end_storetc {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    my $output=&Apache::lonxml::endredirection;
+    $output =~ s/\"/\&quot\;/g;
+    $result = '{\bf '.$output.'.}}\write\tcfile{\protect\tcpc{ '.$output.'.}{\the\value{relpage}}}';
+    return $result;
+}
+
+
+sub start_physnet {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $bodytext = '/adm/includes/physnet.sty';
+    my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
+    my $cbistyletext=&Apache::lonnet::getfile($location);
+
+    %$style = (%$style,&Apache::style::styleparser($target,$cbistyletext));
+    $$parser['-1']->unget_token($token);
+#    if ( defined($$style{'physnet'}) ) {
+#        &Apache::lonxml::newparser($parser,\$$style{'physnet'});
+#    }
+    return "";
+}
+
+sub end_physnet {
+  return '';
+}
+
+sub start_standalone {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+  my $result='';
+  if ($target eq 'web' ) {
+    if ( $ENV{'request.course.id'} ) {
+      my $inside = &Apache::lonxml::get_all_text("/standalone",$parser);
+    } else {
+      $result='<table bgcolor="#E1E1E1" border="2"><tr><td>';
+    }
+  }
+  return $result;
+}
+
+sub end_standalone {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+  my $result='';
+  if ($target eq 'web' ) {
+    if ( $ENV{'request.course.id'} ) {
+    } else {
+      $result='</td></tr></table>';
+    }
+  }
+  return $result;
+}
+
+sub start_comment {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+  my $result='';
+  if ($target eq 'edit') {
+    $result=&Apache::edit::tag_start($target,$token);
+    my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser);
+    $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4)
+  } elsif ( $target eq 'modified') {
+    $result=$token->[4].&Apache::edit::modifiedfield($token);
+  } elsif ( $target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
+	    $target eq 'answer' || $target eq 'meta' || $target eq 'analyze') {
+    #normally throw away comments
+    my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser);
   }
-  return $a
+  return $result;
+}
+
+sub end_comment {
+  my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+  if ($target eq 'edit' ) { return &Apache::edit::end_table(); }
+  return '';
+}
+
+
+sub xmlparse {
+  my ($string) = @_;
+  &Apache::lonxml::debug("Got $string");
+  my ($target,$token,$tagstack,$parstack,$oldparser,$safeeval,$style)=
+    @Apache::scripttag::parser_env;
+  my @parser;
+  &Apache::lonxml::newparser(\@parser,\$string);
+  my $result=&Apache::lonxml::inner_xmlparse($target,$tagstack,
+					     $parstack,\@parser,
+					     $safeeval,$style);
+  return $result;
 }
 
 1;
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at 
 root@localhost to inform them of the time this error occurred,
 and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
</body></html>