--- loncom/xml/lonxml.pm	2001/01/30 21:01:36	1.49
+++ loncom/xml/lonxml.pm	2001/03/27 18:19:29	1.65
@@ -4,10 +4,11 @@
 # last modified 06/26/00 by Alexander Sakharuk
 # 11/6 Gerd Kortemeyer
 # 6/1/1 Gerd Kortemeyer
+# 2/21,3/13 Guy
 
 package Apache::lonxml; 
 use vars 
-qw(@pwd $outputstack $redirection $textredirection $on_offimport @extlinks);
+qw(@pwd @outputstack $redirection $import @extlinks $metamode);
 use strict;
 use HTML::TokeParser;
 use Safe;
@@ -36,26 +37,32 @@ use Apache::lontexconvert;
 use Apache::run;
 use Apache::londefdef;
 use Apache::scripttag;
+use Apache::edit;
 #==================================================   Main subroutine: xmlparse  
 @pwd=();
-$outputstack = '';
-$redirection = 1;
-$textredirection = 1;
-$on_offimport = 0;
+@outputstack = ();
+$redirection = 0;
+$import = 1;
 @extlinks=();
+$metamode = 0;
 
 sub xmlparse {
 
  my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
  if ($target eq 'meta') {
-   $Apache::lonxml::textredirection = 0;
-   $Apache::lonxml::on_offimport = 1;
+   # meta mode is a bit weird only some output is to be turned off
+   #<output> tag turns metamode off (defined in londefdef.pm)
+   $Apache::lonxml::redirection = 0;
+   $Apache::lonxml::metamode = 1;
+   $Apache::lonxml::import = 0;
  } elsif ($target eq 'grade') {
-   $Apache::lonxml::textredirection = 0;
-   $Apache::lonxml::on_offimport = 0;
+   &startredirection;
+   $Apache::lonxml::metamode = 0;
+   $Apache::lonxml::import = 1;
  } else {
-   $Apache::lonxml::textredirection = 1;
-   $Apache::lonxml::on_offimport = 0;
+   $Apache::lonxml::metamode = 0;
+   $Apache::lonxml::redirection = 0;
+   $Apache::lonxml::import = 1;
  }
  #&printalltags();
  my @pars = ();
@@ -89,82 +96,80 @@ sub xmlparse {
  my $token;
  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],$safeeval,'');
+     if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
+       if ($metamode<1) { $result=$token->[1]; }
+     } elsif ($token->[0] eq 'PI') {
+       if ($metamode<1) { $result=$token->[2]; }
      } 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]}) {
-	 
-	 if ($Apache::lonxml::redirection == 1) {
-	   $finaloutput .= &recurse($style_for_target{$token->[1]},
-				    $target,$safeeval,\%style_for_target,
-				    @parstack);
+	 if ($Apache::lonxml::redirection) {
+	   $Apache::lonxml::outputstack['-1'] .=  
+	     &recurse($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);
+	   $finaloutput .= &recurse($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')  {
-       #if ($target eq 'meta') {$Apache::lonxml::textredirection = 0;}
        #clear out any tags that didn't end
-       while ($token->[1] ne $stack[$#stack] 
-	      && ($#stack > -1)) {
-	 &Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']");   
+       while ($token->[1] ne $stack[$#stack] && ($#stack > -1)) {
+	 &Apache::lonxml::warning("Unbalanced tags in resource $stack['-1']");
 	 pop @stack;pop @parstack;&decreasedepth($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) {
+	   $Apache::lonxml::outputstack['-1'] .=  
+	     &recurse($style_for_target{'/'."$token->[1]"},
+		      $target,$safeeval,\%style_for_target,@parstack);
+	 } else {
+	   $finaloutput .= &recurse($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);
+			    \@pars,$safeeval, \%style_for_target);
        }
+     } else {
+       &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
      }
+     #evaluate variable refs in result
      if ($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]);
-        }
-
+	 if ($Apache::lonxml::redirection) {
+	   $Apache::lonxml::outputstack['-1'] .= 
+	     &Apache::run::evaluate($result,$safeeval,$parstack[$#parstack]);
+	 } else {
+	   $finaloutput .= &Apache::run::evaluate($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($token);
      }
-     if ($token->[0] eq 'E') { pop @stack;pop @parstack;&decreasedepth($token);}
    }
    pop @pars;
    pop @Apache::lonxml::pwd;
  }
 
+# if ($target eq 'meta') {
+#   $finaloutput.=&endredirection;
+# }
  return $finaloutput;
 }
 
@@ -181,8 +186,10 @@ sub recurse {
   my $decls='';
   while ( $#pat > -1 ) {
     while  ($tokenpat = $pat[$#pat]->get_token) {
-      if ($tokenpat->[0] eq 'T') {
-	  if ($Apache::lonxml::textredirection == 1) {$partstring = $tokenpat->[1];}
+      if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
+	if ($metamode<1) { $partstring=$tokenpat->[1]; }
+      } elsif ($tokenpat->[0] eq 'PI') {
+	if ($metamode<1) { $partstring=$tokenpat->[2]; }
       } elsif ($tokenpat->[0] eq 'S') {
 	push (@innerstack,$tokenpat->[1]);
 	push (@innerparstack,&parstring($tokenpat));
@@ -200,6 +207,8 @@ sub recurse {
 	$partstring = &callsub("end_$tokenpat->[1]",
 			       $target, $tokenpat, \@innerparstack,
 			       \@pat, $safeeval, $style_for_target);
+      } else {
+	&Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
       }
       #pass both the variable to the style tag, and the tag we 
       #are processing inside the <definedtag>
@@ -233,27 +242,51 @@ sub callsub {
   my ($sub,$target,$token,$parstack,$parser,$safeeval,$style)=@_;
   my $currentstring='';
   {
-      my $sub1;
+    my $sub1;
     no strict 'refs';
+    if ($target eq 'edit' && $token->[0] eq 'S') {
+      $currentstring = &Apache::edit::tag_start($target,$token,$parstack,$parser,
+						$safeeval,$style);
+    }
     if (my $space=$Apache::lonxml::alltags{$token->[1]}) {
-      #&Apache::lonxml::debug("Calling sub $sub in $space<br>\n");
+#      &Apache::lonxml::debug("Calling sub $sub in $space $metamode<br />\n");
       $sub1="$space\:\:$sub";
       $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
-      $currentstring = &$sub1($target,$token,$parstack,$parser,
+      $currentstring .= &$sub1($target,$token,$parstack,$parser,
 			     $safeeval,$style);
     } else {
-      #&Apache::lonxml::debug("NOT Calling sub $sub in $space<br>\n");
-      if (defined($token->[4])) {
-	$currentstring = $token->[4];
-      } else {
-	$currentstring = $token->[2];
+#      &Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode<br />\n");
+      if ($metamode <1) {
+	if (defined($token->[4]) && ($metamode < 1)) {
+	  $currentstring .= $token->[4];
+	} else {
+	  $currentstring .= $token->[2];
+	}
       }
     }
+    if ($target eq 'edit' && $token->[0] eq 'E') {
+      $currentstring .= &Apache::edit::tag_end($target,$token,$parstack,$parser,
+						$safeeval,$style);
+    }
     use strict 'refs';
   }
   return $currentstring;
 }
 
+sub startredirection {
+  $Apache::lonxml::redirection++;
+  push (@Apache::lonxml::outputstack, '');
+}
+
+sub endredirection {
+  if (!$Apache::lonxml::redirection) {
+    &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuggin information:".join ":",caller);
+    return '';
+  }
+  $Apache::lonxml::redirection--;
+  pop @Apache::lonxml::outputstack;
+}
+
 sub initdepth {
   @Apache::lonxml::depthcounter=();
   $Apache::lonxml::depth=-1;
@@ -269,7 +302,7 @@ sub increasedepth {
   }
   my $curdepth=join('_',@Apache::lonxml::depthcounter);
   &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
-#print "<br>s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
+#print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
 }
 
 sub decreasedepth {
@@ -285,7 +318,7 @@ sub decreasedepth {
   }
   my $curdepth=join('_',@Apache::lonxml::depthcounter);
   &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
-#print "<br>e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
+#print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
 }
 
 sub get_all_text {
@@ -294,20 +327,41 @@ 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 = $pars->get_token)) {
-   #&Apache::lonxml::debug("token:$token->[0]:$depth:$token->[1]");
-   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]; } else {
-       $pars->unget_token($token);
+ if ( $tag =~ m:^/: ) { 
+   my $tag=substr($tag,1); 
+#   &Apache::lonxml::debug("have:$tag:");
+   while (($depth >=0) && ($token = $pars->get_token)) {
+#     &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
+     if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
+       $result.=$token->[1];
+     } elsif ($token->[0] eq 'PI') {
+       $result.=$token->[2];
+     } 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]; } else {
+	 $pars->unget_token($token);
+       }
+     }
+   }
+ } else {
+   while ($token = $pars->get_token) {
+#     &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
+     if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
+       $result.=$token->[1];
+     } elsif ($token->[0] eq 'PI') {
+       $result.=$token->[2];
+     } elsif ($token->[0] eq 'S') {
+       if ( $token->[1] eq $tag) { 
+	 $pars->unget_token($token); last;
+       } else {
+	 $result.=$token->[4];
+       }
+     } elsif ($token->[0] eq 'E')  {
+       $result.=$token->[2];
      }
    }
  }
@@ -318,6 +372,7 @@ sub get_all_text {
 sub newparser {
   my ($parser,$contentref,$dir) = @_;
   push (@$parser,HTML::TokeParser->new($contentref));
+  $$parser['-1']->xml_mode('1');
   if ( $dir eq '' ) {
     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
   } else {
@@ -333,7 +388,8 @@ sub parstring {
   map {
     unless ($_=~/\W/) {
       my $val=$token->[2]->{$_};
-      if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
+      $val =~ s/([\%\@\\])/\\$1/g;
+      #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
       $temp .= "my \$$_=\"$val\";"
     }
   } @{$token->[3]};
@@ -361,7 +417,7 @@ sub handler {
   } else {
     $request->content_type('text/html');
   }
-
+  
 #  $request->print(<<ENDHEADER);
 #<html>
 #<head>
@@ -371,21 +427,34 @@ sub handler {
 #ENDHEADER
 #  &Apache::lonhomework::send_header($request);
   $request->send_http_header;
-
+  
   return OK if $request->header_only;
 
-  $request->print(&Apache::lontexconvert::header());
-
-  $request->print('<body bgcolor="#FFFFFF">'."\n");
+  if ($target eq 'web') {
+    $request->print(&Apache::lontexconvert::header());
+    $request->print('<body bgcolor="#FFFFFF">'."\n");
+  }
 
-  my $file = "/home/httpd/html".$request->uri;
+  my $file=&Apache::lonnet::filelocation("",$request->uri);
   my %mystyle;
-  my $result = '';
-  $result = Apache::lonxml::xmlparse($target, &Apache::lonnet::getfile($file),'',%mystyle);
+  my $result = ''; 
+  my $filecontents=&Apache::lonnet::getfile($file);
+  if ($filecontents == -1) {
+    &Apache::lonxml::error("<b> Unable to find <i>$file</i></b>");
+    $filecontents='';
+  } else {
+    $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
+  }
   $request->print($result);
 
-  $request->print('</body>');
-  $request->print(&Apache::lontexconvert::footer());
+
+  if ($target eq 'tex') {
+#    $request->print('\end{document}'."\n");
+  } elsif ($target eq 'web') {
+    $request->print('</body>');
+    $request->print(&Apache::lontexconvert::footer());
+  }
+
   writeallows($request->uri);
   return OK;
 }
@@ -393,37 +462,37 @@ sub handler {
 $Apache::lonxml::debug=0;
 sub debug {
   if ($Apache::lonxml::debug eq 1) {
-    print "DEBUG:".$_[0]."<br>\n";
+    print "DEBUG:".$_[0]."<br />\n";
   }
 }
 
 sub error {
-  print "ERROR:".$_[0]."<br>\n";
+  if ($Apache::lonxml::debug eq 1) {
+    print "<b>ERROR:</b>".$_[0]."<br />\n";
+  } else {
+    print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
+    #notify author
+    &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$_[0]);
+    #notify course
+    if ( $ENV{'request.course.id'} ) {
+      my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
+      foreach my $user (split /\,/, $users) {
+	($user,my $domain) = split /:/, $user;
+	&Apache::lonmsg::user_normal_msg($user,$domain,"Error in $ENV{'request.filename'}",$_[0]);
+      }
+    }
+    
+    #FIXME probably shouldn't have me get everything forever.
+    &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",$_[0]);
+    #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);   
+  }
 }
 
 sub warning {
   if ($Apache::lonxml::debug eq 1) {
-    print "WARNING:".$_[0]."<br>\n";
+    print "<b>W</b>ARNING<b>:</b>".$_[0]."<br />\n";
   }
 }
 
 1;
 __END__
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