--- loncom/xml/lonxml.pm	2000/06/29 18:52:54	1.7
+++ loncom/xml/lonxml.pm	2000/10/02 22:19:19	1.22
@@ -8,6 +8,7 @@ package Apache::lonxml;
 use strict;
 use HTML::TokeParser;
 use Safe;
+use Opcode;
 
 sub register {
   my $space;
@@ -18,7 +19,7 @@ sub register {
     $Apache::lonxml::alltags{$temptag}=$space;
   }
 }
-
+                                     
 use Apache::style;
 use Apache::lontexconvert;
 use Apache::run;
@@ -28,152 +29,149 @@ use Apache::scripttag;
 
 sub xmlparse {
 
- my ($target,$content_file_string,%style_for_target) = @_;
- my $pars = HTML::TokeParser->new(\$content_file_string);
+ my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
+ my @pars = ();
+ push (@pars,HTML::TokeParser->new(\$content_file_string));
  my $currentstring = '';
  my $finaloutput = ''; 
  my $newarg = '';
- my $tempostring = '';
+ 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");
+ $safeinit .= ';$external::target='.$target.';';
+ &Apache::run::run($safeinit,$safeeval);
 #-------------------- Redefinition of the target in the case of compound target
 
  ($target, my @tenta) = split('&&',$target);
 
-#------------------------- Stack definition (in stack we have all current tags)
-
  my @stack = (); 
  my @parstack = ();
-
-#------------------------------------- Parse input string (content_file_string)
- 
+ &initdepth;
  my $token;
- 
- while ($token = $pars->get_token) {
-   if ($token->[0] eq 'T') {
-     $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,'');
-   } elsif ($token->[0] eq 'S') {
-     # add tag to stack 	    
-     push (@stack,$token->[1]);
-     # add parameters list to another stack
-     map {$tempostring .= "my \$$_=\"$token->[2]->{$_}\";"} @{$token->[3]};
-     push (@parstack,$tempostring);
-     $tempostring = '';
-     
-     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]};
-       
-       my $pat = HTML::TokeParser->new(\$newarg);
-       my $tokenpat = '';
-       my $partstring = '';
-       my $oustring = '';
-       my $outputstring;
+ while ( $#pars > -1 ) {
+   while ($token = $pars[$#pars]->get_token) {
+     if ($token->[0] eq 'T') {
+       $result=$token->[1];
+#       $finaloutput .= &Apache::run::evaluate($token->[1],$safeeval,'');
+     } elsif ($token->[0] eq 'S') {
+       # 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);
+       } else {
+	 $result = &callsub("start_$token->[1]", $target, $token,\@parstack,
+			       \@pars, $safeeval, \%style_for_target);
+       }              
+     } elsif ($token->[0] eq 'E')  {
+       #clear out any tags that didn't end
+       while ($token->[1] ne $stack[$#stack] 
+	      && ($#stack > -1)) {pop @stack;pop @parstack;&decreasedepth($token);}
        
-       while  ($tokenpat = $pat->get_token) {
-	 if ($tokenpat->[0] eq 'T') {
-	   $partstring = $tokenpat->[1];
-	 } elsif ($tokenpat->[0] eq 'S') {
-	   my $sub="start_$tokenpat->[1]";
-	   $partstring = &callsub($sub, $target, $tokenpat, \@parstack)
-	 } elsif ($tokenpat->[0] eq 'E') {
-	   my $sub="end_$tokenpat->[1]";
-	   $partstring = &callsub($sub, $target, $tokenpat, \@parstack)
-	 }
-        # generate the my mechanism
-	# map {$partstring =~ s/\$$_/$token->[2]->{$_}/g; } @{$token->[3]};
-	 print "Temp: $parstack[$#parstack]\n";
-	 $oustring .= &Apache::run::evaluate($partstring,$safeeval,$parstack[$#parstack]);
+       if (exists $style_for_target{'/'."$token->[1]"}) {
+	 $finaloutput .= &recurse($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);
        }
-       $finaloutput .= $oustring;
-     } else {
-       my $sub="start_$token->[1]";
-       #print "use default definition of tag $sub\n";
-       my $result = &callsub($sub, $target, $token, \@parstack);
-       $finaloutput .= &Apache::run::evaluate($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]";
-       $finaloutput .= callsub($sub, $target, $token, \@parstack);
      }
-     #---- end tag from the style file
-     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 =  $oustring;
+     if ($result ne "" ) {
+       if ( $#parstack > -1 ) { 
+	 $finaloutput .= &Apache::run::evaluate($result,$safeeval,
+						$parstack[$#parstack]);
        } else {
-         my @very_temp = split(',',$parstack[$#parstack]);
-         map {my @ret= split('=',$_); $newarg =~ s/\$$ret[0]/$ret[1]/g; } @very_temp;
+	 $finaloutput .= &Apache::run::evaluate($result,$safeeval,'');
        }
-       
-       $finaloutput .= $newarg; 
+       $result = '';
      }
-     pop @parstack;
+     if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);}
    }
+   pop @pars;
  }
  return $finaloutput;
 }
 
+sub recurse {
+  
+  my @innerstack = (); 
+  my @innerparstack = ();
+  my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
+  my @pat = ();
+  push (@pat,HTML::TokeParser->new(\$newarg));
+  my $tokenpat;
+  my $partstring = '';
+  my $output='';
+  my $decls='';
+  while ( $#pat > -1 ) {
+    while  ($tokenpat = $pat[$#pat]->get_token) {
+      if ($tokenpat->[0] eq 'T') {
+	$partstring = $tokenpat->[1];
+      } elsif ($tokenpat->[0] eq 'S') {
+	push (@innerstack,$tokenpat->[1]);
+	push (@innerparstack,&parstring($tokenpat));
+	&increasedepth($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] 
+	       && ($#innerstack > -1)) {pop @innerstack;pop @innerparstack;
+					&decreasedepth($tokenpat);}
+	$partstring = &callsub("end_$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 "" ) {
+	if ( $#parstack > -1 ) { 
+	  if ( $#innerparstack > -1 ) { 
+	    $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
+	  } else {
+	    $decls= $parstack[$#parstack];
+	  }
+	} else {
+	  if ( $#innerparstack > -1 ) { 
+	    $decls=$innerparstack[$#innerparstack];
+	  } else {
+	    $decls='';
+	  }
+	}
+	$output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
+	$partstring = '';
+      }
+      if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
+				 &decreasedepth($tokenpat);}
+    }
+    pop @pat;
+  }
+  return $output;
+}
+
 sub callsub {
-  my ($sub,$target,$token,@parstack)=@_;
+  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";
+      &Apache::lonxml::debug("Calling sub $sub in $space<br>\n");
       $sub="$space\:\:$sub";
-      $currentstring = &$sub($target,$token,\@parstack);
+      $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
+      $currentstring = &$sub($target,$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 {
@@ -185,5 +183,86 @@ sub callsub {
   return $currentstring;
 }
 
+sub initdepth {
+  @Apache::lonxml::depthcounter=();
+  $Apache::lonxml::depth=-1;
+  $Apache::lonxml::olddepth=-1;
+}
+
+sub increasedepth {
+  my ($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;
+  }
+}
+
+sub decreasedepth {
+  my ($token) = @_;
+  $Apache::lonxml::depth--;
+#  print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1]<br>\n";
+}
+
+sub get_all_text {
+
+ my($tag,$pars)= @_;
+ my $depth=0;
+ my $token;
+ my $result='';
+ while (($depth >=0) && ($token = $pars->get_token)) {
+   if ($token->[0] eq 'T') {
+     $result.=$token->[1];
+   } elsif ($token->[0] eq 'S') {
+     if ($token->[1] eq $tag) { $depth++; }
+     $result.=$token->[4];
+   } elsif ($token->[0] eq 'E')  {
+     if ($token->[1] eq $tag) { $depth--; }
+     #skip sending back the last end tag
+     if ($depth > -1) { $result.=$token->[2]; }
+   }
+ }
+ return $result
+}
+
+
+sub parstring {
+  my ($token) = @_;
+  my $temp='';
+  map {
+    if ($_=~/\w+/) {
+      $temp .= "my \$$_=\"$token->[2]->{$_}\";"
+    }
+  } @{$token->[3]};
+  return $temp;
+}
+
+$Apache::lonxml::debug=0;
+sub debug {
+  if ($Apache::lonxml::debug eq 1) {
+    print "DEBUG:".$_[0]."<br>\n";
+  }
+}
+sub error {
+  if ($Apache::lonxml::debug eq 1) {
+    print "ERROR:".$_[0]."<br>\n";
+  }
+}
+sub warning {
+  if ($Apache::lonxml::debug eq 1) {
+    print "WARNING:".$_[0]."<br>\n";
+  }
+}
+
 1;
 __END__
+
+
+
+
+