--- loncom/xml/lonxml.pm	2003/11/11 16:48:11	1.292
+++ loncom/xml/lonxml.pm	2004/02/06 20:59:50	1.301
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.292 2003/11/11 16:48:11 sakharuk Exp $
+# $Id: lonxml.pm,v 1.301 2004/02/06 20:59:50 sakharuk Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -167,6 +167,9 @@ $Apache::lonxml::style_end_values='';
 #should we do the postag variable interpolation
 $Apache::lonxml::post_evaluate=1;
 
+#a header message to emit in the case of any generated warning or errors
+$Apache::lonxml::warnings_error_header='';
+
 sub xmlbegin {
   my $output='';
   if ($ENV{'browser.mathml'}) {
@@ -189,7 +192,7 @@ sub xmlend {
 	$mode='problem';
 	$status=$Apache::inputtags::status[-1]; 
     }
-    return &Apache::lonfeedback::list_discussion().'</html>';
+    return &Apache::lonfeedback::list_discussion($mode,$status).'</html>';
 }
 
 sub tokeninputfield {
@@ -402,10 +405,13 @@ sub latex_special_symbols {
 	$string =~ s/_/ /g;
     } else {
 	$string=~s/\\ /\\char92 /g;
-	$string=~s/\^/\\\^ /g;
+	$string=~s/\^/\\\^\\strut /g;
 	$string=~s/\~/\\char126 /g;
-	$string=~s/(&[^A-Za-z\#])/\\$1/g;
+	#fixup & if it doesn't look like
+        # &#123; or &alpha;
+	$string=~s/(&(?!((\#[0-9]+)|([a-z]+));))/\\$1/gi;
 	$string=~s/([^&])\#/$1\\#/g;
+	$string=~s/([^\\])\#/$1\\#/g;
 	$string=~s/(\$|_|{|})/\\$1/g;
 	$string=~s/\\char92 /\\texttt{\\char92}/g;
 	$string=~s/(>|<)/\$$1\$/g; #more or less
@@ -623,6 +629,7 @@ sub setup_globals {
   @Apache::lonxml::extlinks=();
   @Apache::lonxml::ssi_info=();
   $Apache::lonxml::post_evaluate=1;
+  $Apache::lonxml::warnings_error_header='';
   if ($target eq 'meta') {
     $Apache::lonxml::redirection = 0;
     $Apache::lonxml::metamode = 1;
@@ -1288,19 +1295,25 @@ sub display_title {
 }
 
 sub debug {
-  if ($Apache::lonxml::debug eq 1) {
-    $|=1;
-    print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
-  }
+    if ($Apache::lonxml::debug eq "1") {
+	$|=1;
+	my $request=$Apache::lonxml::request;
+	if (!$request) { $request=Apache->request; }
+	$request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
+    }
 }
 
 sub error {
   $errorcount++;
+  my $request=$Apache::lonxml::request;
+  if (!$request) { $request=Apache->request; }
   if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
     # If printing in construction space, put the error inside <pre></pre>
-    print "<b>ERROR:</b>".join("\n",@_)."\n";
+      $request->print($Apache::lonxml::warnings_error_header.
+		      "<b>ERROR:</b>".join("\n",@_)."\n");
+      $Apache::lonxml::warnings_error_header='';
   } else {
-    print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
+    $request->print("<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />");
     #notify author
     &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
     #notify course
@@ -1321,13 +1334,17 @@ sub error {
 }
 
 sub warning {
-  $warningcount++;
+    $warningcount++;
   
-  if ($ENV{'form.grade_target'} ne 'tex') {
-      if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
-        print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
-      }
-  }
+    if ($ENV{'form.grade_target'} ne 'tex') {
+	if ($ENV{'request.state'} eq 'construct' || $Apache::lonxml::debug) {
+	    my $request=$Apache::lonxml::request;
+	    if (!$request) { $request=Apache->request; }
+	    $request->print($Apache::lonxml::warnings_error_header.
+		      "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
+	    $Apache::lonxml::warnings_error_header='';
+	}
+    }
 }
 
 sub get_param {
@@ -1335,6 +1352,9 @@ sub get_param {
     if ( ! $context ) { $context = -1; }
     my $args ='';
     if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
+    if ( ! $Apache::lonxml::usestyle ) {
+	$args=$Apache::lonxml::style_values.$args;
+    }
     if ( ! $args ) { return undef; }
     if ( $case_insensitive ) {
 	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
@@ -1358,6 +1378,9 @@ sub get_param_var {
   if ( ! $context ) { $context = -1; }
   my $args ='';
   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
+  if ( ! $Apache::lonxml::usestyle ) {
+      $args=$Apache::lonxml::style_values.$args;
+  }
   &Apache::lonxml::debug("Args are $args param is $param");
   if ($case_insensitive) {
       if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei)) {