--- loncom/xml/lonxml.pm	2000/11/06 14:32:35	1.32
+++ loncom/xml/lonxml.pm	2001/01/03 00:13:22	1.42
@@ -2,12 +2,15 @@
 # XML Parser Module 
 #
 # last modified 06/26/00 by Alexander Sakharuk
+# 11/6 Gerd Kortemeyer
 
 package Apache::lonxml; 
-
+use vars 
+qw(@pwd $outputstack $redirection $textredirection $on_offimport @extlinks);
 use strict;
 use HTML::TokeParser;
 use Safe;
+use Safe::Hole;
 use Opcode;
 
 sub register {
@@ -26,18 +29,19 @@ use Apache::run;
 use Apache::londefdef;
 use Apache::scripttag;
 #==================================================   Main subroutine: xmlparse  
-@Apache::lonxml::pwd=();
-$Apache::lonxml::outputstack = '';
-$Apache::lonxml::redirection = 1;
-$Apache::lonxml::textredirection = 1;
-$Apache::lonxml::on_offimport = 0;
+@pwd=();
+$outputstack = '';
+$redirection = 1;
+$textredirection = 1;
+$on_offimport = 0;
+@extlinks=();
 
 sub xmlparse {
 
  my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
- if ($target eq 'meta') 
-   {$Apache::lonxml::textredirection = 0;
-    $Apache::lonxml::on_offimport = 1;
+ if ($target eq 'meta') {
+   $Apache::lonxml::textredirection = 0;
+   $Apache::lonxml::on_offimport = 1;
  }
  my @pars = ();
  @Apache::lonxml::pwd=();
@@ -50,9 +54,11 @@ sub xmlparse {
  my $result;
 
  my $safeeval = new Safe;
+ my $safehole = new Safe::Hole;
  $safeeval->permit("entereval");
  $safeeval->permit(":base_math");
  $safeeval->deny(":base_io");
+ $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
 #need to inspect this class of ops
 # $safeeval->deny(":base_orig");
  $safeinit .= ';$external::target='.$target.';';
@@ -69,33 +75,33 @@ sub xmlparse {
  while ( $#pars > -1 ) {
    while ($token = $pars[$#pars]->get_token) {
      if ($token->[0] eq 'T') {
-	 if ($Apache::lonxml::textredirection == 1) {$result=$token->[1];}
-#       $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,'');
+       if ($Apache::lonxml::textredirection == 1) {$result=$token->[1];}
+       # $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,'');
      } elsif ($token->[0] eq 'S') {
-#            if ($target eq 'meta' and $token->[2]->{metaout} eq 'ON') {$Apache::lonxml::textredirection = 1;}
+       # if ($target eq 'meta' and $token->[2]->{metaout} eq 'ON') {$Apache::lonxml::textredirection = 1;}
        # add tag to stack 	    
        push (@stack,$token->[1]);
        # add parameters list to another stack
        push (@parstack,&parstring($token));
        &increasedepth($token);       
        if (exists $style_for_target{$token->[1]}) {
-
-	if ($Apache::lonxml::redirection == 1) {
-	  $finaloutput .= &recurse($style_for_target{$token->[1]},
-		  		  $target,$safeeval,\%style_for_target,
-	 		 	  @parstack);
-        } else {
-          $Apache::lonxml::outputstack .=  &recurse($style_for_target{$token->[1]},
-		  		  $target,$safeeval,\%style_for_target,
-	 		 	  @parstack);
-        }
-
+	 
+	 if ($Apache::lonxml::redirection == 1) {
+	   $finaloutput .= &recurse($style_for_target{$token->[1]},
+				    $target,$safeeval,\%style_for_target,
+				    @parstack);
+	 } else {
+	   $Apache::lonxml::outputstack .=  &recurse($style_for_target{$token->[1]},
+					$target,$safeeval,\%style_for_target,
+					@parstack);
+	 }
+	 
        } else {
 	 $result = &callsub("start_$token->[1]", $target, $token,\@parstack,
-			       \@pars, $safeeval, \%style_for_target);
+			    \@pars, $safeeval, \%style_for_target);
        }              
      } elsif ($token->[0] eq 'E')  {
-#	 if ($target eq 'meta') {$Apache::lonxml::textredirection = 0;}
+       #if ($target eq 'meta') {$Apache::lonxml::textredirection = 0;}
        #clear out any tags that didn't end
        while ($token->[1] ne $stack[$#stack] 
 	      && ($#stack > -1)) {pop @stack;pop @parstack;&decreasedepth($token);}
@@ -236,22 +242,24 @@ sub initdepth {
 
 sub increasedepth {
   my ($token) = @_;
-  if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
-    $#Apache::lonxml::depthcounter--;
-    $Apache::lonxml::olddepth=$Apache::lonxml::depth;
-  }
   $Apache::lonxml::depth++;
-#  print "<br>s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n";
   $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
   if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
     $Apache::lonxml::olddepth=$Apache::lonxml::depth;
   }
+  my $curdepth=join('_',@Apache::lonxml::depthcounter);
+  &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
 }
 
 sub decreasedepth {
   my ($token) = @_;
   $Apache::lonxml::depth--;
-#  print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n";
+  if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
+    $#Apache::lonxml::depthcounter--;
+    $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
+  }
+  my $curdepth=join('_',@Apache::lonxml::depthcounter);
+  &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
 }
 
 sub get_all_text {
@@ -271,7 +279,9 @@ sub get_all_text {
    } elsif ($token->[0] eq 'E')  {
      if ( $token->[1] eq $tag) { $depth--; }
      #skip sending back the last end tag
-     if ($depth > -1) { $result.=$token->[2]; }
+     if ($depth > -1) { $result.=$token->[2]; } else {
+       $pars->unget_token($token);
+     }
    }
  }
  return $result
@@ -293,13 +303,26 @@ sub parstring {
   my ($token) = @_;
   my $temp='';
   map {
-    if ($_=~/\w+/) {
-      $temp .= "my \$$_=\"$token->[2]->{$_}\";"
+    unless ($_=~/\W/) {
+      my $val=$token->[2]->{$_};
+      if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
+      $temp .= "my \$$_=\"$val\";"
     }
   } @{$token->[3]};
   return $temp;
 }
 
+sub writeallows {
+    my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
+    my $thisdir=$thisurl;
+    $thisdir=~s/\/[^\/]+$//;
+    my %httpref=();
+    map {
+       $httpref{'httpref.'.
+ 	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;              } @extlinks;
+    &Apache::lonnet::appenv(%httpref);
+}
+
 sub handler {
   my $request=shift;
 
@@ -335,6 +358,7 @@ sub handler {
 
   $request->print('</body>');
   $request->print(&Apache::lontexconvert::footer());
+  writeallows($request->uri);
   return 'OK';
 }