--- loncom/xml/lonxml.pm	2000/06/29 13:58:23	1.6
+++ loncom/xml/lonxml.pm	2000/08/03 18:24:24	1.15
@@ -8,10 +8,23 @@ package Apache::lonxml;
 use strict;
 use HTML::TokeParser;
 use Safe;
+use Opcode;
+
+sub register {
+  my $space;
+  my @taglist;
+  my $temptag;
+  ($space,@taglist) = @_;
+  foreach $temptag (@taglist) {
+    $Apache::lonxml::alltags{$temptag}=$space;
+  }
+}
+                                     
 use Apache::style;
 use Apache::lontexconvert;
-use Apache::londefdef;
 use Apache::run;
+use Apache::londefdef;
+use Apache::scripttag;
 #==================================================   Main subroutine: xmlparse  
 
 sub xmlparse {
@@ -21,10 +34,9 @@ sub xmlparse {
  my $currentstring = '';
  my $finaloutput = ''; 
  my $newarg = '';
- my $tempostring = '';
- my $tempocont = '';
  my $safeeval = new Safe;
  $safeeval->permit("entereval");
+ $safeeval->permit(":base_math");
 #-------------------- Redefinition of the target in the case of compound target
 
  ($target, my @tenta) = split('&&',$target);
@@ -40,156 +52,118 @@ sub xmlparse {
  
  while ($token = $pars->get_token) {
    if ($token->[0] eq 'T') {
-     $finaloutput .= $token->[1];
-     $tempocont .= $token->[1];
+     $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,'');
    } elsif ($token->[0] eq 'S') {
-#------------------------------------------------------------- add tag to stack 	    
+     # add tag to stack 	    
      push (@stack,$token->[1]);
-#----------------------------------------- add parameters list to another stack
-     map {$tempostring .= "$_=$token->[2]->{$_},"} @{$token->[3]};
-     push (@parstack,$tempostring);
-     $tempostring = '';
+     # add parameters list to another stack
+     push (@parstack,&parstring($token));
      
      if (exists $style_for_target{$token->[1]}) {
-#       print "Style for $token->[1] is " .$style_for_target{$token->[1]}."\n";
-#---------------------------------------------------- use style file definition
-
-       $newarg = $style_for_target{$token->[1]};
-       
-       if (index($newarg,'script') != -1 ) {
-	 my $pat = HTML::TokeParser->new(\$newarg);
-	 my $tokenpat = '';
-	 my $partstring = '';
-	 my $oustring = '';
-	 my $outputstring;
-	 
-	 while  ($tokenpat = $pat->get_token) {
-	   if ($tokenpat->[0] eq 'T') {
-#	     print "evaluating $tokenpat->[4]\n";
-	     $oustring .= &Apache::run::evaluate($tokenpat->[1],$safeeval);
-	   } elsif ($tokenpat->[0] eq 'S') {
-	     if ($tokenpat->[1] eq 'script') {
-	       while  ($tokenpat = $pat->get_token and $tokenpat->[1] ne 'script') {
-		 if ($tokenpat->[0] eq 'S')  {
-		   $partstring .=  $tokenpat->[4];
-		 } elsif ($tokenpat->[0] eq 'T') {
-		   $partstring .=  $tokenpat->[1];
-		 } elsif ($tokenpat->[0] eq 'E') {
-		   $partstring .=  $tokenpat->[2];
-		 }
-	       }
-	       
-	       map {$partstring =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]};
-#	       print "want to use run\n";	       
-	       &Apache::run::run($partstring,$safeeval);
-	       
-	       $partstring = '';
-	     } else {
-#	       print "evaluating $tokenpat->[4]\n";
-	       $oustring .= &Apache::run::evaluate($tokenpat->[4],$safeeval);
-	     }
-	   } elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') {
-#	     print "hereish\n";
-	     $oustring .= $tokenpat->[1];    
-	   }
-	 }
-	 $newarg =  $oustring;
-       } else {
-	 map {$newarg =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]};
-       }
-       $finaloutput .= $newarg;
+       $finaloutput .= &recurse($style_for_target{$token->[1]},
+				$target,$safeeval,\%style_for_target,
+				@parstack);
      } else {
-       # use default definition of tag
-       my $sub="start_$token->[1]";
-       {
-	 no strict 'refs';
-	 if (defined (&$sub)) {
-	   $currentstring = &$sub($target,$token,\@parstack);
-	   $finaloutput .= $currentstring;
-	   $currentstring = '';
-	 } else {
-	   $finaloutput .= $token->[4];
-	 }
-	 use strict 'refs';    
+       my $result = &callsub("start_$token->[1]", $target, $token,\@parstack,
+			     $pars, $safeeval, \%style_for_target);
+       if ($result ne "" ) {
+	 $finaloutput .= &Apache::run::evaluate($result,$safeeval,
+						$parstack[$#parstack]);
        }
      }              
    } elsif ($token->[0] eq 'E')  {
-     # Put here check for correct final tag (to avoid existence of 
-     # starting tag only)
-        
-     pop @stack; 
-     unless (exists $style_for_target{$token->[1]}) {
-       my $sub="end_$token->[1]";
-       {
-	 no strict 'refs';
-	 if (defined(&$sub)) {
-	   $currentstring = &$sub($target,$token,\@parstack);
-	   $finaloutput .= $currentstring;
-	   $currentstring = '';
-	 } else {
-	   $finaloutput .= $token->[4];
-	 }
-	 use strict 'refs';
-       }
-     }
-     #---- end tag from the style file
+     #clear out any tags that didn't end
+     while ($token->[1] ne $stack[$#stack] 
+	    && ($#stack > 0)) {pop @stack;pop @parstack;}
+
      if (exists $style_for_target{'/'."$token->[1]"}) {
-       $newarg = $style_for_target{'/'."$token->[1]"};
-       if (index($newarg,'script') != -1 ) {
-         my $pat = HTML::TokeParser->new(\$newarg);
-         my $tokenpat;
-         my $partstring = '';
-         my $oustring = '';
-         my $outputstring;
-	 
-         while  ($tokenpat = $pat->get_token) {
-	   if ($tokenpat->[0] eq 'T') {
-	     $oustring .= $tokenpat->[1];
-	   } elsif ($tokenpat->[0] eq 'S') {
-             if ($tokenpat->[1] eq 'script') {
-               while  ($tokenpat = $pat->get_token and $tokenpat->[1] ne 'script') {
-		 if ($tokenpat->[0] eq 'S')  {
-		   $partstring .=  $tokenpat->[4];
-		 } elsif ($tokenpat->[0] eq 'T') {
-		   $partstring .=  $tokenpat->[1];
-		 } elsif ($tokenpat->[0] eq 'E') {
-		   $partstring .=  $tokenpat->[2];
-		 }
-	       }
-	       
-               my @tempor_list = split(',',$parstack[$#parstack]);
-               my @te_kl = ();
-               my %tempor_hash = ();
-               map {(my $onete,my $twote) = split('=',$_); push (@te_kl,$onete); 
-                    $tempor_hash{$onete} = $twote} @tempor_list;
-               map {$partstring =~ s/\$$_/$tempor_hash{$_}/g; } @te_kl; 
-	       print "want to use run\n";
-               &Apache::run::run($partstring,$safeeval);
-	       
-               $partstring = '';
-	     } elsif ($tokenpat->[1] eq 'evaluate') {		
-	       $outputstring = &Apache::run::evaluate($tokenpat->[2]{expression},$safeeval);
-	       $oustring .=  $outputstring;
-	     } else {
-	       $oustring .= $tokenpat->[4]; 
-	     }
-	   } elsif ($tokenpat->[0] eq 'E' and $tokenpat->[1] ne 'evaluate') {
-             $oustring .= $tokenpat->[1];    
-	   }
-         }
-	 $newarg =  $oustring;
-       } else {
-         my @very_temp = split(',',$parstack[$#parstack]);
-         map {my @ret= split('=',$_); $newarg =~ s/\$$ret[0]/$ret[1]/g; } @very_temp;
+       $finaloutput .= &recurse($style_for_target{'/'."$token->[1]"},
+			       $target,$safeeval,\%style_for_target,
+				@parstack);
+     } else {
+       my $result = &callsub("end_$token->[1]", $target, $token, \@parstack,
+			     $pars,$safeeval, \%style_for_target);
+       if ($result ne "") {
+	 $finaloutput .= &Apache::run::evaluate($result,$safeeval,
+						$parstack[$#parstack]);
        }
-       
-       $finaloutput .= $newarg; 
      }
+     pop @stack; 
      pop @parstack;
    }
  }
  return $finaloutput;
 }
 
+sub recurse {
+  
+  my @innerstack = (); 
+  my @innerparstack = ();
+  my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
+  my $pat = HTML::TokeParser->new(\$newarg);
+  my $tokenpat;
+  my $partstring = '';
+  my $output='';
+  while  ($tokenpat = $pat->get_token) {
+    if ($tokenpat->[0] eq 'T') {
+      $partstring = $tokenpat->[1];
+    } elsif ($tokenpat->[0] eq 'S') {
+      push (@innerstack,$tokenpat->[1]);
+      push (@innerparstack,&parstring($tokenpat));
+      $partstring = &callsub("start_$tokenpat->[1]", 
+			     $target, $tokenpat, \@innerparstack,
+			     $pat, $safeeval, $style_for_target);
+    } elsif ($tokenpat->[0] eq 'E') {
+      #clear out any tags that didn't end
+      while ($tokenpat->[1] ne $innerstack[$#innerstack] 
+	     && ($#innerstack > 0)) {pop @innerstack;pop @innerparstack;}
+      $partstring = &callsub("end_$tokenpat->[1]",
+			     $target, $tokenpat, \@innerparstack,
+			     $pat, $safeeval, $style_for_target);
+    }
+    #pass both the variable to the style tag, and the tag we 
+    #are processing inside the <definedtag>
+    if ( $partstring ne "" ) {
+      $output .= &Apache::run::evaluate($partstring,$safeeval,
+                  $parstack[$#parstack].$innerparstack[$#innerparstack]);
+    }
+    if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack; }
+  }
+  return $output;
+}
+
+sub callsub {
+  my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_;
+  my $currentstring='';
+  {
+    no strict 'refs';
+    if (my $space=$Apache::lonxml::alltags{$token->[1]}) {
+      #print "Calling sub $sub in $space \n";
+      $sub="$space\:\:$sub";
+      $currentstring = &$sub($target,$token,\@$parstack,$parser,$safeeval,$style);
+    } else {
+      #print "NOT Calling sub $sub\n";
+      if (defined($token->[4])) {
+	$currentstring = $token->[4];
+      } else {
+	$currentstring = $token->[2];
+      }
+    }
+    use strict 'refs';
+  }
+  return $currentstring;
+}
+
+sub parstring {
+  my ($token) = @_;
+  my $temp='';
+  map {$temp .= "my \$$_=\"$token->[2]->{$_}\";"} @{$token->[3]};
+  return $temp;
+}
 1;
 __END__
+
+
+
+
+