--- loncom/interface/lonhtmlcommon.pm	2004/06/03 16:42:02	1.73
+++ loncom/interface/lonhtmlcommon.pm	2004/06/04 16:05:47	1.74
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common html routines
 #
-# $Id: lonhtmlcommon.pm,v 1.73 2004/06/03 16:42:02 www Exp $
+# $Id: lonhtmlcommon.pm,v 1.74 2004/06/04 16:05:47 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -882,13 +882,36 @@ _editor_lang='$lang';
 ENDHEADERS
 }
 
+# ------------------------------------------------- Activate additional buttons
+
+sub htmlareaaddbuttons {
+    if (&htmlareablocked()) { return ''; }
+    return (<<ENDADDBUTTON);
+    var config=new HTMLArea.Config();
+    config.registerButton('ed_math','LaTeX Inline',
+			  '/htmlarea/images/ed_math.gif',false,
+			    function(editor,id) {
+			      editor.surroundHTML('<m>\$','\$</m>');
+			    }
+			  );
+    config.registerButton('ed_math_eqn','LaTeX Equation',
+			  '/htmlarea/images/ed_math_eqn.gif',false,
+			    function(editor,id) {
+			      editor.surroundHTML('<br /><m>\\\\[','\\\\]</m><br />');
+			    }
+			  );
+    config.toolbar.push(['ed_math','ed_math_eqn']);
+ENDADDBUTTON
+}
 # ---------------------------------------------------------- Script to activate
 
 sub htmlareaactive {
     if (&htmlareablocked()) { return ''; }
+    my $addbuttons=&htmlareaaddbuttons();
     return (<<ENDSCRIPT);
 <script type="text/javascript" defer="1">
-    HTMLArea.replaceAll();
+    $addbuttons
+    HTMLArea.replaceAll(config);
 </script>
 ENDSCRIPT
 }
@@ -898,9 +921,10 @@ ENDSCRIPT
 sub htmlareaselectactive {
     my @fields=@_;
     if (&htmlareablocked()) { return ''; }
-    my $output='<script type="text/javascript" defer="1">';
+    my $output='<script type="text/javascript" defer="1">'.
+	&htmlareaaddbuttons();
     foreach(@fields) {
-	$output.="\nHTMLArea.replace('$_');";
+	$output.="\nHTMLArea.replace('$_',config);";
     }
     $output.="\nwindow.status='Activated Editfields';\n</script>";
     return $output;