--- loncom/xml/lonxml.pm	2000/08/16 18:32:58	1.19
+++ loncom/xml/lonxml.pm	2000/11/07 23:39:07	1.36
@@ -2,9 +2,11 @@
 # 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 $on_offimport @extlinks);
 use strict;
 use HTML::TokeParser;
 use Safe;
@@ -26,23 +28,39 @@ use Apache::run;
 use Apache::londefdef;
 use Apache::scripttag;
 #==================================================   Main subroutine: xmlparse  
+@pwd=();
+$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;
+ }
  my @pars = ();
- push (@pars,HTML::TokeParser->new(\$content_file_string));
+ @Apache::lonxml::pwd=();
+ my $pwd=$ENV{'request.filename'};
+ $pwd =~ s:/[^/]*$::;
+ &newparser(\@pars,\$content_file_string,$pwd);
  my $currentstring = '';
  my $finaloutput = ''; 
  my $newarg = '';
  my $result;
+
  my $safeeval = new Safe;
  $safeeval->permit("entereval");
  $safeeval->permit(":base_math");
  $safeeval->deny(":base_io");
 #need to inspect this class of ops
 # $safeeval->deny(":base_orig");
- if ( $safeinit ne '') {&Apache::run::run($safeinit,$safeeval);}
+ $safeinit .= ';$external::target='.$target.';';
+ $safeinit .= ';$external::randomseed='.&Apache::lonnet::rndseed().';';
+ &Apache::run::run($safeinit,$safeeval);
 #-------------------- Redefinition of the target in the case of compound target
 
  ($target, my @tenta) = split('&&',$target);
@@ -54,49 +72,78 @@ sub xmlparse {
  while ( $#pars > -1 ) {
    while ($token = $pars[$#pars]->get_token) {
      if ($token->[0] eq 'T') {
-       $result=$token->[1];
+	 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;}
        # 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]}) {
-	 $finaloutput .= &recurse($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, $safeeval, \%style_for_target);
        }              
      } elsif ($token->[0] eq 'E')  {
+#	 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);}
+	      && ($#stack > -1)) {pop @stack;pop @parstack;&decreasedepth($token);&Apache::lonxml::debug("Clearing out stack");}
        
        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);
+        }
+
        } else {
 	 $result = &callsub("end_$token->[1]", $target, $token, \@parstack,
 			       \@pars,$safeeval, \%style_for_target);
        }
      }
-     if ($result ne "" ) {
-       if ( $#parstack > -1 ) { 
+     if ($result ne "") {
+       if ( $#parstack > -1 ) {
+ 
+	if ($Apache::lonxml::redirection == 1) {
 	 $finaloutput .= &Apache::run::evaluate($result,$safeeval,
 						$parstack[$#parstack]);
+        } else {
+         $Apache::lonxml::outputstack .= &Apache::run::evaluate($result,$safeeval,
+						$parstack[$#parstack]);
+        }
+
        } else {
 	 $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
        }
        $result = '';
+     } else {
+         $finaloutput .= $result;
      }
      if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);}
    }
    pop @pars;
+   pop @Apache::lonxml::pwd;
  }
+
  return $finaloutput;
 }
 
@@ -106,7 +153,7 @@ sub recurse {
   my @innerparstack = ();
   my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
   my @pat = ();
-  push (@pat,HTML::TokeParser->new(\$newarg));
+  &newparser(\@pat,\$newarg);
   my $tokenpat;
   my $partstring = '';
   my $output='';
@@ -114,7 +161,7 @@ sub recurse {
   while ( $#pat > -1 ) {
     while  ($tokenpat = $pat[$#pat]->get_token) {
       if ($tokenpat->[0] eq 'T') {
-	$partstring = $tokenpat->[1];
+	  if ($Apache::lonxml::textredirection == 1) {$partstring = $tokenpat->[1];}
       } elsif ($tokenpat->[0] eq 'S') {
 	push (@innerstack,$tokenpat->[1]);
 	push (@innerparstack,&parstring($tokenpat));
@@ -154,6 +201,7 @@ sub recurse {
 				 &decreasedepth($tokenpat);}
     }
     pop @pat;
+    pop @Apache::lonxml::pwd;
   }
   return $output;
 }
@@ -162,15 +210,16 @@ sub callsub {
   my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_;
   my $currentstring='';
   {
+      my $sub1;
     no strict 'refs';
     if (my $space=$Apache::lonxml::alltags{$token->[1]}) {
-      #print "Calling sub $sub in $space \n";
-      $sub="$space\:\:$sub";
+      #&Apache::lonxml::debug("Calling sub $sub in $space<br>\n");
+      $sub1="$space\:\:$sub";
       $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
-      $currentstring = &$sub($target,$token,$parstack,$parser,
+      $currentstring = &$sub1($target,$token,$parstack,$parser,
 			     $safeeval,$style);
     } else {
-      #print "NOT Calling sub $sub\n";
+      #&Apache::lonxml::debug("NOT Calling sub $sub in $space<br>\n");
       if (defined($token->[4])) {
 	$currentstring = $token->[4];
       } else {
@@ -190,22 +239,24 @@ 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);
+#  print "<br>s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]<br>\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);
+#  print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth <br>\n";
 }
 
 sub get_all_text {
@@ -214,6 +265,8 @@ sub get_all_text {
  my $depth=0;
  my $token;
  my $result='';
+ my $tag=substr($tag,1); #strip the / off the tag
+# &Apache::lonxml::debug("have:$tag:");
  while (($depth >=0) && ($token = $pars->get_token)) {
    if ($token->[0] eq 'T') {
      $result.=$token->[1];
@@ -221,25 +274,121 @@ sub get_all_text {
      if ($token->[1] eq $tag) { $depth++; }
      $result.=$token->[4];
    } elsif ($token->[0] eq 'E')  {
-     if ($token->[1] eq $tag) { $depth--; }
+     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
 }
 
+sub newparser {
+  my ($parser,$contentref,$dir) = @_;
+  push (@$parser,HTML::TokeParser->new($contentref));
+  if ( $dir eq '' ) {
+    push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
+  } else {
+    push (@Apache::lonxml::pwd, $dir);
+  } 
+#  &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
+#  &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
+}
 
 sub parstring {
   my ($token) = @_;
   my $temp='';
-  map {$temp .= "my \$$_=\"$token->[2]->{$_}\";"} @{$token->[3]};
+  map {
+    unless ($_=~/\W/) {
+      $temp .= "my \$$_=\"$token->[2]->{$_}\";"
+    }
+  } @{$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;
+
+  my $target='web';
+  $Apache::lonxml::debug=1;
+  if ($ENV{'browser.mathml'}) {
+    $request->content_type('text/xml');
+  } else {
+    $request->content_type('text/html');
+  }
+
+#  $request->print(<<ENDHEADER);
+#<html>
+#<head>
+#<title>Just test</title>
+#</head>
+#<body bgcolor="#FFFFFF">
+#ENDHEADER
+#  &Apache::lonhomework::send_header($request);
+  $request->send_http_header;
+
+  return 'OK' if $request->header_only;
+
+  $request->print(&Apache::lontexconvert::header());
+
+  $request->print('<body bgcolor="#FFFFFF">'."\n");
+
+  my $file = "/home/httpd/html".$request->uri;
+  my %mystyle;
+  my $result = '';
+  $result = Apache::lonxml::xmlparse($target, &Apache::lonnet::getfile($file),'',%mystyle);
+  $request->print($result);
+
+  $request->print('</body>');
+  $request->print(&Apache::lontexconvert::footer());
+  writeallows($request->uri);
+  return 'OK';
+}
+ 
+$Apache::lonxml::debug=0;
+sub debug {
+  if ($Apache::lonxml::debug eq 1) {
+    print "DEBUG:".$_[0]."<br>\n";
+  }
+}
+sub error {
+  print "ERROR:".$_[0]."<br>\n";
+}
+sub warning {
+  if ($Apache::lonxml::debug eq 1) {
+    print "WARNING:".$_[0]."<br>\n";
+  }
+}
+
 1;
 __END__
 
 
 
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