--- loncom/xml/lonxml.pm	2001/03/13 22:44:24	1.56
+++ loncom/xml/lonxml.pm	2001/03/30 01:42:23	1.67
@@ -5,10 +5,11 @@
 # 11/6 Gerd Kortemeyer
 # 6/1/1 Gerd Kortemeyer
 # 2/21,3/13 Guy
+# 3/29 Gerd Kortemeyer
 
 package Apache::lonxml; 
 use vars 
-qw(@pwd @outputstack $redirection $textredirection $import @extlinks);
+qw(@pwd @outputstack $redirection $import @extlinks $metamode);
 use strict;
 use HTML::TokeParser;
 use Safe;
@@ -37,23 +38,30 @@ use Apache::lontexconvert;
 use Apache::run;
 use Apache::londefdef;
 use Apache::scripttag;
+use Apache::edit;
 #==================================================   Main subroutine: xmlparse  
 @pwd=();
 @outputstack = ();
 $redirection = 0;
 $import = 1;
 @extlinks=();
+$metamode = 0;
 
 sub xmlparse {
 
  my ($target,$content_file_string,$safeinit,%style_for_target) = @_;
  if ($target eq 'meta') {
-   &startredirection;
+   # 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') {
    &startredirection;
+   $Apache::lonxml::metamode = 0;
    $Apache::lonxml::import = 1;
  } else {
+   $Apache::lonxml::metamode = 0;
    $Apache::lonxml::redirection = 0;
    $Apache::lonxml::import = 1;
  }
@@ -89,8 +97,10 @@ sub xmlparse {
  my $token;
  while ( $#pars > -1 ) {
    while ($token = $pars[$#pars]->get_token) {
-     if ($token->[0] eq 'T') {
-       $result=$token->[1];
+     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 ($token->[0] eq 'S') {
        # add tag to stack 	    
        push (@stack,$token->[1]);
@@ -127,11 +137,13 @@ sub xmlparse {
 				    $target,$safeeval,\%style_for_target,
 				    @parstack);
 	 }
-	 
+
        } else {
 	 $result = &callsub("end_$token->[1]", $target, $token, \@parstack,
 			    \@pars,$safeeval, \%style_for_target);
        }
+     } else {
+       &Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
      }
      #evaluate variable refs in result
      if ($result ne "") {
@@ -156,9 +168,18 @@ sub xmlparse {
    pop @Apache::lonxml::pwd;
  }
 
+# if ($target eq 'meta') {
+#   $finaloutput.=&endredirection;
+# }
+
+  if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
+      $finaloutput=&afterburn($finaloutput);
+  }
+
  return $finaloutput;
 }
 
+
 sub recurse {
   
   my @innerstack = (); 
@@ -172,8 +193,10 @@ sub recurse {
   my $decls='';
   while ( $#pat > -1 ) {
     while  ($tokenpat = $pat[$#pat]->get_token) {
-      if ($tokenpat->[0] eq 'T') {
-	$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));
@@ -191,6 +214,8 @@ sub recurse {
 	$partstring = &callsub("end_$tokenpat->[1]",
 			       $target, $tokenpat, \@innerparstack,
 			       \@pat, $safeeval, $style_for_target);
+      } else {
+	&Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
       }
       #pass both the variable to the style tag, and the tag we 
       #are processing inside the <definedtag>
@@ -224,22 +249,32 @@ sub callsub {
   my ($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;
@@ -299,20 +334,41 @@ 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];
      }
    }
  }
@@ -358,6 +414,52 @@ sub writeallows {
     &Apache::lonnet::appenv(%httpref);
 }
 
+#
+# Afterburner handles anchors, highlights and links
+#
+
+sub afterburn {
+    my $result=shift;
+    map {
+       my ($name, $value) = split(/=/,$_);
+       $value =~ tr/+/ /;
+       $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
+       if (($name eq 'highlight')||($name eq 'anchor')||($name eq 'link')) {
+           unless ($ENV{'form.'.$name}) {
+              $ENV{'form.'.$name}=$value;
+	   }
+       }
+    } (split(/&/,$ENV{'QUERY_STRING'}));
+    if ($ENV{'form.highlight'}) {
+        map {
+           my $anchorname=$_;
+	   my $matchthis=$anchorname;
+           $matchthis=~s/\_+/\\s\+/g;
+           $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
+       } split(/\,/,$ENV{'form.highlight'});
+    }
+    if ($ENV{'form.link'}) {
+        map {
+           my ($anchorname,$linkurl)=split(/\>/,$_);
+	   my $matchthis=$anchorname;
+           $matchthis=~s/\_+/\\s\+/g;
+           $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
+       } split(/\,/,$ENV{'form.link'});
+    }
+    if ($ENV{'form.anchor'}) {
+        my $anchorname=$ENV{'form.anchor'};
+	my $matchthis=$anchorname;
+        $matchthis=~s/\_+/\\s\+/g;
+        $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
+        $result.=(<<"ENDSCRIPT");
+<script>
+    document.location.hash='$anchorname';
+</script>
+ENDSCRIPT
+    }
+    return $result;
+}
+
 sub handler {
   my $request=shift;
   
@@ -368,7 +470,7 @@ sub handler {
   } else {
     $request->content_type('text/html');
   }
-
+  
 #  $request->print(<<ENDHEADER);
 #<html>
 #<head>
@@ -378,12 +480,13 @@ sub handler {
 #ENDHEADER
 #  &Apache::lonhomework::send_header($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 $file=&Apache::lonnet::filelocation("",$request->uri);
   my %mystyle;
@@ -395,11 +498,16 @@ sub handler {
   } else {
     $result = &Apache::lonxml::xmlparse($target,$filecontents,'',%mystyle);
   }
-  $request->print($result);
 
+  if ($target eq 'tex') {
+#    $request->print('\end{document}'."\n");
+  } elsif ($target eq 'web') {
+    $request->print('</body>');
+    $request->print(&Apache::lontexconvert::footer());
+  }
+
+  $request->print($result);
 
-  $request->print('</body>');
-  $request->print(&Apache::lontexconvert::footer());
   writeallows($request->uri);
   return OK;
 }