--- loncom/xml/lonxml.pm	2006/02/04 22:11:42	1.396
+++ loncom/xml/lonxml.pm	2006/03/10 23:49:35	1.401
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.396 2006/02/04 22:11:42 foxr Exp $
+# $Id: lonxml.pm,v 1.401 2006/03/10 23:49:35 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -649,6 +649,7 @@ sub setup_globals {
   @Apache::lonxml::ssi_info=();
   $Apache::lonxml::post_evaluate=1;
   $Apache::lonxml::warnings_error_header='';
+  $Apache::lonxml::substitute_LaTeX_symbols = 1;
   if ($target eq 'meta') {
     $Apache::lonxml::redirection = 0;
     $Apache::lonxml::metamode = 1;
@@ -970,6 +971,16 @@ sub decreasedepth {
 #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
 }
 
+sub get_id {
+    my ($parstack,$safeeval)=@_;
+    my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
+    if ($env{'request.state'} eq 'construct' && $id =~ /(\.|_)/) {
+	&error(&mt("IDs are not allowed to contain &quot;<tt>_</tt>&quot; or &quot;<tt>.</tt>&quot;"));
+    }
+    if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
+    return $id;
+}
+
 sub get_all_text_unbalanced {
 #there is a copy of this in lonpublisher.pm
     my($tag,$pars)= @_;
@@ -1027,9 +1038,36 @@ sub init_counter {
 
 sub store_counter {
     &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
+    $Apache::lonxml::counter_changed=0;
     return '';
 }
 
+{
+    my $state;
+    sub clear_problem_counter {
+	undef($state);
+	&Apache::lonnet::delenv('form.counter');
+	&Apache::lonxml::init_counter();
+	&Apache::lonxml::store_counter();
+    }
+
+    sub remember_problem_counter {
+	&Apache::lonnet::transfer_profile_to_env();
+	$state = $env{'form.counter'};
+    }
+
+    sub restore_problem_counter {
+	if (defined($state)) {
+	    &Apache::lonnet::appenv(('form.counter' => $state));
+	}
+    }
+    sub get_problem_counter {
+	if ($Apache::lonxml::counter_changed) { &store_counter() }
+	&Apache::lonnet::transfer_profile_to_env();
+	return $env{'form.counter'};
+    }
+}
+
 sub get_all_text {
     my($tag,$pars,$style)= @_;
     my $gotfullstack=1;