loncom/xml/scripttag.pm - diff

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Diff for /loncom/xml/scripttag.pm between versions 1.12 and 1.156

-version 1.12, 2000/08/11 15:27:58
+version 1.156, 2010/06/02 21:27:50
  Line 1
  # The LearningOnline Network with CAPA
  # <script> definiton
+ #
+ # $Id$
+ #
+ # 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/
+ #
+ package Apache::scripttag;
- package Apache::scripttag;
  use strict;
  use Apache::lonnet;
+ use Apache::lonlocal;
+ use Apache::style();
+ #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','num','parse','algebra',
+ 			     'LONCAPA_INTERNAL_TURN_STYLE_ON',
+ 			     'LONCAPA_INTERNAL_TURN_STYLE_OFF'));
+ }
+ sub start_LONCAPA_INTERNAL_TURN_STYLE_ON {
+     $Apache::lonxml::usestyle=1;
+     $Apache::lonxml::style_values='';
+     return ('','no');
+ }
- sub BEGIN {
+ sub end_LONCAPA_INTERNAL_TURN_STYLE_ON {
-   &Apache::lonxml::register('Apache::scripttag',('script','scriptlib',
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
- 						 'parserlib','import'));
+     my $end=&Apache::lonxml::get_param('end',$parstack,$safeeval);
+     if (defined($end)) {
+ 	&Apache::lonxml::end_tag($tagstack,$parstack,$token);
+     }
+     return ('','no');
+ }
+ sub start_LONCAPA_INTERNAL_TURN_STYLE_OFF {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+     $Apache::lonxml::usestyle=0;
+     my $end=&Apache::lonxml::get_param('end',$parstack,$safeeval);
+     if (!$end) {
+ 	$Apache::lonxml::style_values=$$parstack[-1];
+ 	$Apache::lonxml::style_end_values=$$parstack[-1];
+     } else {
+ 	$Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
+ 	$Apache::lonxml::style_end_values='';
+     }
+     return ('','no');
+ }
+ sub end_LONCAPA_INTERNAL_TURN_STYLE_OFF {
+     return ('','no');
  }
  sub start_script {
-   my ($target,$token,$parstack,$parser,$safeeval)=@_;
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-   my $result="";
+   @Apache::scripttag::parser_env = @_;
-   my $bodytext=$$parser[$#$parser]->get_text("/script");
+   my $result='';
-   if ($target ne "edit" ) {
+   my $type= &Apache::lonxml::get_param('type',$parstack,$safeeval);
-     $result = &Apache::run::run($bodytext,$safeeval);
+   &Apache::lonxml::debug("found type of $type");
+   if ($type eq "loncapa/perl") {
+     if ( $target eq "modified" ) {
+ 	$result=$token->[4].&Apache::edit::modifiedfield('/script',$parser);
+     } elsif ( $target eq 'web' || $target eq 'tex' ||
+ 	      $target eq 'grade' || $target eq 'webgrade' ||
+ 	      $target eq 'answer' || $target eq 'analyze' ) {
+ 	my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
+ 	if (!$Apache::lonxml::default_homework_loaded) {
+ 	    &Apache::lonxml::default_homework_load($safeeval);
+ 	}
+ 	&Apache::run::run($bodytext,$safeeval);
+ 	if (($target eq 'answer') &&
+ 	    ($env{'form.answer_output_mode'} ne 'tex') &&
+ 	    ($Apache::lonhomework::viewgrades == 'F')) {
+ 	    $Apache::lonxml::evaluate--;
+ 	    my (undef,undef,$udom,$uname)=&Apache::lonnet::whichuser();
+ 	    my $windowopen=&Apache::lonhtmlcommon::javascript_docopen();
+ 	    my $start_page =
+ 		&Apache::loncommon::start_page('Script Vars', undef,
+ 					       {'only_body' => 1,
+ 						'bgcolor'   => '#FFFFFF',
+ 						'js_ready'  => 1,});
+ 	    my $end_page =
+ 		&Apache::loncommon::end_page({'js_ready' => 1,});
+ 	    $uname =~s/\W//g;
+ 	    $udom  =~s/\W//g;
+ 	    my $function_name =
+ 		join('_','LONCAPA_scriptvars',$uname,$udom,
+ 		     $env{'form.counter'},$Apache::lonxml::curdepth);
+ 	    my $script_var ="<script type=\"text/javascript\">
+ // <![CDATA[
+     function $function_name() {newWindow=open('','new_W','width=500,height=500,scrollbars=1,resizable=yes');newWindow.$windowopen;newWindow.document.writeln('$start_page<pre>";
+ 	    my $listing=&Apache::run::dump($target,$safeeval);
+ 	    $listing=~s/\\/\\\\/g;
+ 	    $listing=~s/\'/\\\'/g;
+ 	    $script_var.=$listing;
+ 	    $script_var.= "<\\/pre>$end_page');newWindow.document.close();newWindow.focus()}
+ // ]]>
+ </script><a href=\"javascript:$function_name();void(0);\">".&mt('Script Vars')."</a><br />";
+ 	    &Apache::lonxml::add_script_result($script_var);
+ 	}
+     } elsif ($target eq "edit" ) {
+       #&Apache::run::run($bodytext,$safeeval);
+       #$result="<br /> &lt;$token->[1]&gt; output: <br />$bodytext<br />Source:<br />";
+ 	my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
+ 	$result=&Apache::edit::tag_start($target,$token,'Script');
+ 	$result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4);
+     } elsif ($target eq 'meta') {
+ 	my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
+     }
    } else {
-     $result=&editfield($token->[1],$bodytext);
+       my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/script",$parser);
+       if ($target ne "meta" && $target ne 'tex' && $target ne 'answer') {
+ 	  $result = $token->[4];
+ 	  $result.=$bodytext;
+       }
+   }
+   return $result;
+ }
+ sub end_script {
+   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" && $target ne 'tex') {
+     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,$tagstack,$parstack,$parser,$safeeval)=@_;
+   @Apache::scripttag::parser_env = @_;
+   my $result;
+   if ( $target eq "modified" ) {
+       $result=$token->[4].&Apache::edit::modifiedfield("/display",$parser);
+   } elsif ( $target eq 'web' || $target eq 'tex' ||
+ 	    $target eq 'grade' || $target eq 'webgrade' ||
+ 	    $target eq 'answer' || $target eq 'analyze') {
+       my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
+       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') {
+ 	  # grade/answer/analyxe should produce no output but if we
+ 	  # are redirecting, the redirecter should know what to do
+ 	  # with the output
+ 	  if (!$Apache::lonxml::redirection) { $result=''; }
+       }
+       $Apache::lonxml::post_evaluate=0;
+   } elsif ($target eq "edit" ) {
+     my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
+     #$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)
+   } elsif ($target eq 'meta') {
+       my $bodytext=&Apache::lonxml::get_all_text_unbalanced("/display",$parser);
    }
    return $result;
  }
- sub end_script {}
+ 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 ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-   my $bodytext=$$parser[$#$parser]->get_text("/scriptlib");
+   my $bodytext;
-   my $result ="";
+   my $result ='';
-   if ($target ne "edit" ) {
+   my $error='';
-     $bodytext=Apache::run::evaluate($bodytext,$safeeval,$$parstack[$#$parstack]);
-     &Apache::run::run(&getfile($bodytext),$safeeval);
+   if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
-     #print "ran $bodytext:<br>".&getfile($bodytext)."<br>";
+       $target eq 'meta' || $target eq 'edit' || $target eq 'answer' ||
-   } else {
+       $target eq 'analyze' || $target eq 'webgrade') {
-     $result=&editfield($token->[1],$bodytext);
+     $bodytext=$$parser[$#$parser]->get_text("/scriptlib");
+     $bodytext=&Apache::run::evaluate($bodytext,$safeeval,
+ 				     $$parstack[$#$parstack]);
+     my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],
+ 					       $bodytext);
+     my $script=&Apache::lonnet::getfile($location);
+     if ($script == -1) {
+       if ($target eq 'edit') {
+         $error='</tr><tr><td>'.&mt('Errors').'</td><td colspan="2"><b>'.&mt(' Unable to find [_1]','<span class="LC_filename">'.$location.'</span>').'</b></td>'."\n";
+       } else {
+ 	&Apache::lonxml::error("<b> Unable to find <i>$location</i> for scriptlib</b>");
+ 	return "";
+       }
+     }
+     &Apache::run::run($script,$safeeval);
+     #&Apache::lonxml::debug("ran $bodytext:<br />".&Apache::lonnet::getfile($bodytext)."<br />");
+   }
+   if ($target eq "edit" ) {
+     $result=
+       &Apache::edit::tag_start($target,$token,'New Script Functions').
+ 	&Apache::edit::editline($token->[1],$bodytext,'scriptlib',40).
+             &Apache::edit::browse(undef,'textnode').
+ 	  $error.'</td></tr>'.
+ 	    &Apache::edit::end_table();
+   }
+   if ($target eq "modified" ) {
+       $result=$token->[4].&Apache::edit::modifiedfield("/scriptlib",$parser);
    }
    return $result;
  }
- sub end_scriptlib {}
+ sub end_scriptlib {
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+   my @result;
+   if ($target eq "edit" ) { $result[1]='no'; }
+   return @result;
+ }
  sub start_parserlib {
-   my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-   my $bodytext=$$parser[$#$parser]->get_text("/parserlib");
+   my $bodytext;
    my $result ="";
-   if ($target ne "edit" ) {
+   my $error='';
-     $bodytext=Apache::run::evaluate($bodytext,$safeeval,$$parstack[$#$parstack]);
+   if ($target eq 'web' || $target eq 'tex' || $target eq 'grade' ||
-     %$style = ( %$style , &Apache::style::styleparser($target,
+       $target eq 'meta' || $target eq 'edit' || $target eq 'answer' ||
- 		&getfile($bodytext)));
+       $target eq 'analyze' || $target eq 'webgrade') {
-   } else {
+     $bodytext=$$parser[$#$parser]->get_text("/parserlib");
-     $result=&editfield($token->[1],$bodytext);
+     $bodytext=&Apache::run::evaluate($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));
+   }
+   if ($target eq "edit" ) {
+     $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" ) {
+       $result=$token->[4].&Apache::edit::modifiedfield("/parserlib",$parser);
    }
    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_window {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+     my $result = '';
+     if ($target eq 'web' || $target eq 'webgrade') {
+ 	&Apache::lonxml::startredirection;
+     } elsif ($target eq 'tex') {
+ 	$result = '\unskip\footnote{';
+     } elsif ($target eq 'edit') {
+ 	$result.=&Apache::edit::tag_start($target,$token);
+ 	$result.=&Apache::edit::text_arg('Text of Link:','linktext',$token,70);
+ 	$result.=&Apache::edit::text_arg('Height:','height',$token,5);
+ 	$result.=&Apache::edit::text_arg('Width:','width',$token,5);
+ 	$result.=&Apache::edit::text_arg('Mime Type:','mimetype',$token,5);
+ 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
+     } elsif ($target eq 'modified') {
+ 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+ 						     $safeeval,'linktext',
+ 						     'width','height',
+ 						     'mimetype');
+ 	if ($constructtag) { $result=&Apache::edit::rebuild_tag($token); }
+     }
+     return $result;
+ }
+ sub end_window {
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+   my $result;
+   if ($target eq 'web' || $target eq 'webgrade') {
+     my $output=&Apache::lonxml::endredirection;
+     $output =~ s/[\n\r]/ /g;
+ #    $output = &HTML::Entities::encode($output,'<>&"\'');
+     $output =~ s/\'/\\\'/g;
+     my $linktext= &Apache::lonxml::get_param('linktext',$parstack,$safeeval);
+     if (!$linktext) { $linktext='<sup>*</sup>'; }
+     my $width= &Apache::lonxml::get_param('width',$parstack,$safeeval);
+     if (!$width) { $width='500'; }
+     my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
+     if (!$height) { $height='200'; }
+     my $mimetype= &Apache::lonxml::get_param('mimetype',$parstack,$safeeval)
+ 	          || 'text/html';
+     my ($start_page,$end_page);
+     if ($mimetype eq 'text/html') {
+ 	$start_page =
+ 	    &Apache::loncommon::start_page($linktext, undef,
+ 					   {'only_body' => 1,
+ 					    'bgcolor'   => '#FFFFFF',
+ 					    'js_ready'  => 1,});
+ 	$end_page =
+ 	    &Apache::loncommon::end_page({'js_ready' => 1,});
+     }
+     $result = "<script type=\"text/javascript\">
+ //<!--
+  function LONCAPA_newwindow_$Apache::lonxml::curdepth() {
+ newWindow=open(".&Apache::lonhtmlcommon::javascript_nothing().",'new_W');
+ newWindow.close();
+ newWindow=open(".&Apache::lonhtmlcommon::javascript_nothing().",'new_W','width=$width,height=$height,scrollbars=1');
+ newWindow.".&Apache::lonhtmlcommon::javascript_docopen($mimetype).";
+ newWindow.document.writeln('$start_page $output $end_page');
+ newWindow.document.close();}
+ //-->
+ </script><a href=\"javascript:LONCAPA_newwindow_$Apache::lonxml::curdepth();void(0);\">$linktext</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 $result ="";
-   if ($target ne "edit" ) {
-     $bodytext=Apache::run::evaluate($bodytext,$safeeval,$$parstack[$#$parstack]);
+   $bodytext=&Apache::run::evaluate($bodytext,$safeeval,$$parstack[$#$parstack]);
-     my $file=&getfile($bodytext);
-     my $tempparser=HTML::TokeParser->new(\$file);
+   if ($target eq 'web' ||  $target eq 'webgrade' || $target eq 'grade'
-     push (@$parser,$tempparser);
+       || $target eq 'answer' || $target eq 'tex' || $target eq 'analyze' ) {
-   } else {
+     # FIXME this probably needs to be smart about construction vs.
-     $result=&editfield($token->[1],$bodytext);
+     # non construction space.
-     $result.="Click<a href=\"/res/$bodytext\">here</a> to edit<br></br>"
+     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 "";
+     }
+     my $importmode=&Apache::lonxml::get_param('importmode',$parstack,$safeeval);
+     if (($importmode eq 'problem') || ($importmode eq 'part')) {
+ # We are using import to import published problems
+        if (($importmode eq 'problem') || ($file=~/<part[^<]*>/s)) {
+ # We explicitly don't want this to be a separate part or the problem already has parts
+           $file=~s/^\s*<problem>/<library>/s;
+ 	  $file=~s/<\/problem>\s*$/<\/library>/s;
+        } else {
+ # We want this to be a separate part, but it currently is not
+           $file=~s/^\s*<problem>/<library><part>/s;
+ 	  $file=~s/<\/problem>\s*$/<\/part><\/library>/s;
+        }
+     }
+     my $dir=$location;
+     $dir=~s:/[^/]*$::;
+     #  &Apache::lonxml::debug("directory $dir $location file $file \n<b>END</b>\n");
+     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
+     if (!$id) { $id=$Apache::lonxml::curdepth; }
+     push(@Apache::inputtags::import,$id);
+     push(@Apache::inputtags::importlist,$id);
+     &Apache::lonxml::newparser($parser,\$file,$dir);
+   } elsif ($target eq "edit" ) {
+     $result.=&Apache::edit::tag_start($target,$token);
+     my $location=$token->[1];
+     $location=~s/^\s*//s;
+     $location=~s/\s*$//s;
+     $result.=&Apache::edit::editline($location,$bodytext,'',40);
+     $result.=&Apache::edit::browse(undef,'textnode');
+     $result.= '&nbsp;<label>'.&mt('Import as:').
+               '<select name="importmode_'.$Apache::lonxml::curdepth.'">';
+     my %options=&Apache::lonlocal::texthash(''        => 'as standard library',
+                                             'problem' => 'as problem',
+                                             'part'    => 'as problem part(s)');
+     foreach my $option (sort(keys(%options))) {
+        $result.='<option value="'.$option.'"';
+        if ($option eq &Apache::lonxml::get_param('importmode',$parstack,$safeeval)) {
+           $result.=' selected="selected"';
+        }
+        $result.='>'.$options{$option}.'</option>';
+     }
+     $result.='</select></label>';
+     #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') {
+       &Apache::edit::get_new_args($token,$parstack,$safeeval,'importmode');
+       $result='<import id="'.$token->[2]{'id'}.'" importmode="'.$token->[2]{'importmode'}.'">';
+       $result.=&Apache::edit::modifiedfield("/import",$parser);
+   } elsif ($target eq 'meta') {
+     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
+     $result.='<import part="'.$Apache::inputtags::part;
+     if ($id) {
+       $result.='" id="'.$id;
+     }
+     $result.='" importmode="'.$token->[2]{'importmode'}.'">';
+     $result.=$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_row.
+ 				&Apache::edit::end_table(); }
+   return $result;
+ }
+ sub start_storetc {
+   my ($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 $result;
  }
- sub editfield {
-   my ($tag,$data)=@_;
+ sub start_physnet {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-   my $count=0;
+     my $bodytext = '/adm/includes/physnet.sty';
-   my $maxlength=-1;
+     my $location=&Apache::lonnet::filelocation($Apache::lonxml::pwd['-1'],$bodytext);
-   map { $count++;
+     my $cbistyletext=&Apache::lonnet::getfile($location);
- 	if (length($_) > $maxlength) { $maxlength = length ($_); }
-       } split ("\n", $data);
+     %$style = (%$style,&Apache::style::styleparser($target,$cbistyletext));
+     $$parser['-1']->unget_token($token);
-   return "<br></br>\n&lt;$tag&gt;<br></br>\n&nbsp;&nbsp;&nbsp;<textarea rows=\"$count\" cols=\"$maxlength\" name=homework_edit_".$Apache::lonxml::curdepth.">$data</textarea><br></br>\n&lt;/$tag&gt;<br></br>\n";
+ #    if ( defined($$style{'physnet'}) ) {
- }
+ #        &Apache::lonxml::newparser($parser,\$$style{'physnet'});
+ #    }
- sub getfile {
+     return "";
-   my ($filename) = @_;
+ }
-   my $a="";
+ sub end_physnet {
-   $filename=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
+   return '';
-   $filename="/home/httpd/html/res".$filename;
+ }
-   if (! -e $filename ) {
-     &Apache::lonnet::subscribe($filename);
+ sub start_standalone {
-     &Apache::lonnet::repcopy($filename);
+   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-   }
+   my $result='';
-   my $fh=Apache::File->new($filename);
+   if ($target eq 'web' || $target eq 'webgrade') {
-   while (<$fh>) {
+     if ( $env{'request.course.id'} ) {
-       $a .=$_;
+       my $inside = &Apache::lonxml::get_all_text("/standalone",$parser,$style);
+     } 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' || $target eq 'webgrade' ) {
+     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,$style);
+     $result.=&Apache::edit::editfield($token->[1],$bodytext,'',80,4)
+   } elsif ( $target eq 'modified') {
+     $result=$token->[4].&Apache::edit::modifiedfield("/comment",$parser);
+   } elsif ( $target eq 'web'    || $target eq 'tex'  || $target eq 'grade'   ||
+ 	    $target eq 'answer' || $target eq 'meta' || $target eq 'analyze' ||
+ 	    $target eq 'webgrade') {
+     #normally throw away comments
+     my $bodytext=&Apache::lonxml::get_all_text("/comment",$parser,$style);
    }
-   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("xmlparse recursion starting with $string");
+   # Apache::run::evaluate does an 'eval' on the name of the subroutine
+   # if it detects something that looks like a subroutine, this ends up calling
+   # things without any arguments and since perl is nice enough to pass
+   # along the default arguments when you don't explicitly say no arguments
+   # if you call &xmlparse, it gets &xmlparse passed as it argument.
+   # Same thing soccurs with &chemparse.
+   if ($string eq '&xmlparse') { return '&xmlparse'; }
+   if ($string eq '&chemparse') { return '&chemparse'; }
+   my ($target,$token,$tagstack,$parstack,$oldparser,$safeeval,$style)=
+     @Apache::scripttag::parser_env;
+   my @parser;
+   &Apache::lonxml::newparser(\@parser,\$string);
+   &Apache::lonxml::startredirection();
+   my $result=&Apache::lonxml::inner_xmlparse($target,$tagstack,
+ 					     $parstack,\@parser,
+ 					     $safeeval,$style);
+   $result.=&Apache::lonxml::endredirection();
+   &Apache::lonxml::debug("target is $target xmlparse recursion ending with $result");
+   return $result;
+ }
+ sub start_num {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+     my $result = '';
+     my $inside = &Apache::lonxml::get_all_text_unbalanced("/num",$parser);
+     if ($target eq 'tex' || $target eq 'web' || $target eq 'webgrade') {
+ 	$inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
+ 	if (!$Apache::lonxml::default_homework_loaded) {
+ 	    &Apache::lonxml::default_homework_load($safeeval);
+ 	}
+ 	@Apache::scripttag::parser_env = @_;
+ 	my $format=&Apache::lonxml::get_param('format',$parstack,$safeeval);
+ 	$result=&Apache::run::run("return &prettyprint(q\0$inside\0,q\0$format\0);",$safeeval);
+     }
+     return $result;
+ }
+ sub end_num {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+     my $result = '';
+     return $result;
+ }
+ sub start_parse {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+     my $result = '';
+     if ( $target eq 'web'    || $target eq 'tex'    ||
+ 	 $target eq 'grade'  || $target eq 'answer' ||
+ 	 $target eq 'analyze'|| $target eq 'webgrade') {
+ 	my $inside = &Apache::lonxml::get_all_text_unbalanced("/parse",$parser);
+ 	$inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
+ 	if (!$Apache::lonxml::default_homework_loaded) {
+ 	    &Apache::lonxml::default_homework_load($safeeval);
+ 	}
+ 	@Apache::scripttag::parser_env = @_;
+ 	$result=&Apache::run::run("return &xmlparse(q\0$inside\0);",$safeeval);
+ 	if ($target eq 'grade' || $target eq 'answer' ||
+ 	    $target eq 'analyze') {
+ 	    # grade/answer/analyxe should produce no output but if we
+ 	    # are redirecting, the redirecter should know what to do
+ 	    # with the output
+ 	    if (!$Apache::lonxml::redirection) { $result=''; }
+ 	}
+     }
+     return $result;
+ }
+ sub end_parse {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+     my $result = '';
+     return $result;
+ }
+ sub start_algebra {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+     my $result = '';
+     if ( $target eq 'web'     || $target eq 'tex'    ||
+ 	 $target eq 'grade'   || $target eq 'answer' ||
+ 	 $target eq 'analyze' || $target eq 'webgrade') {
+ 	my $inside = &Apache::lonxml::get_all_text_unbalanced("/algebra",$parser);
+ 	$inside = &Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
+ 	if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
+ 	    my $style=&Apache::lonxml::get_param('style',$parstack,$safeeval);
+ 	    $result=&Apache::lontexconvert::algebra($inside,undef,$target,$style,$parstack,$safeeval);
+ 	}
+ 	$Apache::lonxml::post_evaluate=0;
+     }
+     return $result;
+ }
+ sub end_algebra {
+     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+     my $result = '';
+     return $result;
  }
 ;
  __END__
+ =pod
+ =head1 NAME
+ Apache::scripttag.pm
+ =head1 SYNOPSIS
+ implements <script>, <scriptlib>, <parserlib>,
+ and <import>
+ This is part of the LearningOnline Network with CAPA project
+ described at http://www.lon-capa.org.
+ =cut

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