--- loncom/xml/lontexconvert.pm	2003/02/27 21:01:39	1.19
+++ loncom/xml/lontexconvert.pm	2003/10/18 15:53:00	1.27
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # TeX Conversion Module
 #
-# $Id: lontexconvert.pm,v 1.19 2003/02/27 21:01:39 albertel Exp $
+# $Id: lontexconvert.pm,v 1.27 2003/10/18 15:53:00 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -83,7 +83,7 @@ sub converted {
   my $texstring=shift;
   my $xmlstring='[UNDISPLAYABLE]';
   if ($Apache::lontexconvert::messedup) {
-      return '[Uncoverted Due To Previous Errors]';
+      return '[TeX Unconverted Due To Previous Errors]';
   }
   eval(<<'ENDCONV');
   {
@@ -98,6 +98,8 @@ sub converted {
       $xmlstring=&tth::tth($$texstring);
       $errorstring.=&tth::ttherror();
     }
+    $xmlstring=~s/^\s*//;
+    $xmlstring=~s/\s*$//;
   }
 ENDCONV
   if ($Apache::lontexconvert::messedup || &tth::tthmessedup()) {
@@ -127,11 +129,36 @@ sub footer {
 
 sub to_convert {
     my ($string) = @_;
-    $string=~s/\<br\s*\/?\>/ /g;
+    $string=~s/\<br\s*\/?\>/ /gs;
+    $string=~s/\s/ /gs;
     $string=&HTML::Entities::decode($string);
     return &converted(\$string);
 }
 
+sub smiley {
+   my $expression=shift;
+   if ($ENV{'browser.imagesuppress'} eq 'on') { return $expression; }
+   my %smileys=('\:\-\)' => 'smiley',
+                '8\-\)'  => 'coolsmile',
+                '8\-(I|\|)'   => 'coolindiff',
+                ':\-(I|\|)'   => 'neutral',
+                '\:\-(o|O|\(\))' => 'shocked',
+                ':\-\('  => 'frowny',
+                '\;\-\)' => 'wink',
+                '\:\-P'  => 'baeh',
+                '\:\-(\\\|\\/)' => 'hrrm',
+                '\:\-D'  => 'bigsmile',
+                '\:\-C'  => 'angry',
+                '\:(\'|\`)\-\(' => 'cry',
+                '\:\-(X|\#)' => 'lipsrsealed',
+                '\:\-S' => 'huh');
+   my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
+   foreach (keys %smileys) {
+      $expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs; 
+   }
+   return $expression;
+}
+
 sub msgtexconverted {
     my $message=shift;
 
@@ -151,11 +178,20 @@ sub msgtexconverted {
 	    &tth::tthoptions('-L -u0');
 	}
     }
-    $message=~s/(\$\$.+?\$\$)/&to_convert($1)/ge;
-    $message=~s/(\$.+?\$)/&to_convert($1)/ge;
-    $message=~s/(\\\(.+?\\\))/&to_convert($1)/ge;
-    $message=~s/(\\\[.+?\\\])/&to_convert($1)/ge;
-    return $message.$errorstring;
+    my $outmessage='';
+    my $tex=0;
+    foreach (split(/(?:\&lt\;|\<)\/*m\s*(?:\&gt\;|\>)/i,$message)) {
+	if ($tex) {
+	    $outmessage.=&to_convert($_); $tex=0;
+	} else {
+            $outmessage.=&smiley($_); $tex=1;
+	}
+    }
+    if (wantarray) {
+	return ($outmessage,$errorstring);
+    } else {
+	return $outmessage.$errorstring;
+    }
 }
 
 1;