--- loncom/interface/lonpreferences.pm	2016/01/27 00:24:09	1.217
+++ loncom/interface/lonpreferences.pm	2016/02/20 00:12:39	1.220
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Preferences
 #
-# $Id: lonpreferences.pm,v 1.217 2016/01/27 00:24:09 raeburn Exp $
+# $Id: lonpreferences.pm,v 1.220 2016/02/20 00:12:39 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -160,11 +160,13 @@ sub texenginechanger {
     my $domain     = $env{'user.domain'};
     my %userenv = &Apache::lonnet::get('environment',['texengine']);
     my $texengine=$userenv{'texengine'};
+    if (lc($texengine) eq 'jsmath') {
+        $texengine = 'MathJax';
+    }
 
     my %mathchoices=('' => 'Default',
 		     'tth' => 'tth (TeX to HTML)',
 		     #'ttm' => 'TeX to MathML',
-		     'jsMath' => 'jsMath',
 		     'MathJax' => 'MathJax',
 		     'mimetex' => 'mimetex (Convert to Images)',
                      'raw' => 'Raw (Screen Reader)'
@@ -176,7 +178,6 @@ sub texenginechanger {
                'texengine',
                \%mathchoices);
     my $MathJax_start=&Apache::lontexconvert::MathJax_header();
-    my $jsMath_start=&Apache::lontexconvert::jsMath_header();
     my %lt=&Apache::lonlocal::texthash(
       'headline' => 'Change how math is displayed',
       'preftxt'  => 'Preferred method to display math',
@@ -184,26 +185,10 @@ sub texenginechanger {
       'exmpl'    => 'Examples',
       'mathjax'  => 'MathJax:',
       'mathjaxinfo' => 'MathJax provides rendered equations whose source code can be extracted in TeX and MathML formats by right clicking the equation.',
-      'jsmath'   => 'jsMath:',
       'tth'      => 'tth (TeX to HTML):',
       'mimetex'  => 'mimetex (Convert to Images):',
     );
 
-    my $jsMathWarning='<p>'
-                     .'<div class="LC_warning">'
-                     .&mt("It looks like you don't have the TeX math fonts installed.")
-                     .'</div>'
-                     .'<div>'
-                     .&mt('The jsMath example on this page may not look right without them. '
-                         .'The [_1]jsMath Home Page[_2] has information on how to download the '
-                         .'needed fonts. In the meantime, jsMath will do the best it can '
-                         .'with the fonts you have, but it may not be pretty and some equations '
-                         .'may not be rendered correctly.'
-                         ,'<a href="http://www.math.union.edu/locate/jsMath/" target="_blank">'
-                         ,'</a>')
-                     .'</div>'
-                     .'</p>';
-
     $r->print(<<ENDLSCREEN);
 <h2>$lt{'headline'}</h2>
 <form name="prefs" action="/adm/preferences" method="post">
@@ -226,18 +211,6 @@ $lt{'exmpl'}
 $lt{'mathjaxinfo'}
 </p>
 
-<h3>$lt{'jsmath'}</h3> 
-<p>
-$jsMath_start
-<script type="text/javascript" language="JavaScript">
-if (jsMath.nofonts == 1) {
-    document.writeln($jsMathWarning);
-}
-
-</script>
-<iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=jsMath" width="400" height="150"></iframe>
-</p>
-
 <h3>$lt{'mimetex'}</h3>
 <p>
 <iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=mimetex" width="400" height="150"></iframe>
@@ -248,9 +221,6 @@ if (jsMath.nofonts == 1) {
 <iframe src="/res/adm/pages/math_example.tex?inhibitmenu=yes&texengine=tth" width="400" height="150"></iframe>
 </p>
 ENDLSCREEN
-    if ($env{'environment.texengine'} ne 'jsMath') {
-	$r->print('<script type="text/javascript" language="JavaScript">jsMath.Process()</script>');
-    }
 }
 
 
@@ -261,6 +231,9 @@ sub verify_and_change_texengine {
 # Screenname
     my $newtexengine  = $env{'form.texengine'};
     $newtexengine=~s/[^\-\w]//g;
+    if (lc($newtexengine) eq 'jsmath') {
+        $newtexengine = 'MathJax';
+    }
     if ($newtexengine eq 'ttm') {
 	&Apache::lonnet::appenv({'browser.mathml' => 1});
     } else {
@@ -713,16 +686,51 @@ sub verify_and_change_clicker {
     my $r = shift;
     my $user       = $env{'user.name'};
     my $domain     = $env{'user.domain'};
+    my $uhome      = $env{'user.home'};
     my $newclickers  = $env{'form.clickers'};
+    my $message;
     $newclickers=~s/[^\w\:\-]+/\,/gs;
     $newclickers=~tr/a-z/A-Z/;
     $newclickers=~s/[\:\-]+/\-/g;
     $newclickers=~s/\,+/\,/g;
     $newclickers=~s/^\,//;
     $newclickers=~s/\,$//;
-    &Apache::lonnet::put('environment',{'clickers' => $newclickers});
-    &Apache::lonnet::appenv({'environment.clickers' => $newclickers});
-    my $message=&Apache::lonhtmlcommon::confirm_success(&mt('Registering clickers: [_1]',$newclickers));
+    my @oldclickers = split(/,/,$env{'environment.clickers'});
+    my @newclickers = split(/,/,$newclickers);
+    my %newuniq;
+    map { $newuniq{$_} = 1; }  @newclickers;
+    @newclickers = sort(keys(%newuniq));
+    my @differences = &Apache::loncommon::compare_arrays(\@oldclickers,\@newclickers);
+    if (@differences) {
+        my $putres = &Apache::lonnet::put('environment',{'clickers' => $newclickers});
+        if ($putres eq 'ok') {
+            my @adds = ();
+            my @dels = ();
+            foreach my $item (@differences) {
+                if (grep(/^\Q$item\E$/,@newclickers)) {
+                    push(@adds,$item);
+                } else {
+                    push(@dels,$item);
+                }
+            }
+            if (@dels) {
+                 my %delclicker;
+                 map { $delclicker{$_} = $user; } @dels;
+                 my $putresult = &Apache::lonnet::iddel($domain,\%delclicker,$uhome,'clickers');
+            }
+            if (@adds) {
+                 my %addclicker;
+                 map { $addclicker{$_} = $user; } @adds;
+                 my $putresult = &Apache::lonnet::updateclickers($domain,'add',\%addclicker,$uhome,1);
+            }
+            &Apache::lonnet::appenv({'environment.clickers' => $newclickers});
+            $message=&Apache::lonhtmlcommon::confirm_success(&mt('Registering clickers: [_1]',$newclickers));
+        } else {
+            $message=&Apache::lonhtmlcommon::confirm_success(&mt('Error saving clicker ID').1);
+        }
+    } else {
+        $message='<span class="LC_info">'.&mt('Clicker information unchanged').'</span>';
+    }
     $message=&Apache::loncommon::confirmwrapper($message);
     &print_main_menu($r, $message);
 }
@@ -1374,21 +1382,18 @@ sub jscript_send {
         uextkey=this.document.client.elements.ukey_cpass.value;
         lextkey=this.document.client.elements.lkey_cpass.value;
         initkeys();
-
-        this.document.pserver.elements.currentpass.value
-            =crypted(this.document.client.elements.currentpass.value);
-
+        this.document.pserver.elements.currentpass.value =
+            getCrypted(this.document.client.elements.currentpass.value);
         uextkey=this.document.client.elements.ukey_npass1.value;
         lextkey=this.document.client.elements.lkey_npass1.value;
         initkeys();
         this.document.pserver.elements.newpass_1.value
-            =crypted(this.document.client.elements.newpass_1.value);
-
+            =getCrypted(this.document.client.elements.newpass_1.value);
         uextkey=this.document.client.elements.ukey_npass2.value;
         lextkey=this.document.client.elements.lkey_npass2.value;
         initkeys();
         this.document.pserver.elements.newpass_2.value
-            =crypted(this.document.client.elements.newpass_2.value);
+            =getCrypted(this.document.client.elements.newpass_2.value);
 |;
     if ($caller eq 'reset_by_email') {
         $output .= qq|
@@ -1403,6 +1408,7 @@ sub jscript_send {
     $ output .= qq|
         this.document.pserver.submit();
     }
+
 </script>
 |;
 }
@@ -1428,7 +1434,7 @@ sub client_form {
                   .&Apache::lonhtmlcommon::row_closure()
                   .&Apache::lonhtmlcommon::row_title(
                        '<label for="uname">'.$lt{'username'}.'</label>')
-                  .'<input type="text" name="uname" size="15" />'
+                  .'<input type="text" name="uname" size="20" />'
                   .'<input type="hidden" name="currentpass" value="'.$currentpass.'" />'
                   .&Apache::lonhtmlcommon::row_closure()
                   .&Apache::lonhtmlcommon::row_title(
@@ -1438,16 +1444,16 @@ sub client_form {
     } else {
         $output .= &Apache::lonhtmlcommon::row_title(
                        '<label for="currentpass">'.$lt{'currentpass'}.'</label>')
-                  .'<input type="password" name="currentpass" size="10"/>'
+                  .'<input type="password" name="currentpass" size="20"/>'
                   .&Apache::lonhtmlcommon::row_closure();
     }
     $output .= &Apache::lonhtmlcommon::row_title(
                    '<label for="newpass_1">'.$lt{'newpass'}.'</label>')
-              .'<input type="password" name="newpass_1" size="10" />'
+              .'<input type="password" name="newpass_1" size="20" />'
               .&Apache::lonhtmlcommon::row_closure()
               .&Apache::lonhtmlcommon::row_title(
                    '<label for="newpass_2">'.$lt{'confirmpass'}.'</label>')
-              .'<input type="password" name="newpass_2" size="10" />'
+              .'<input type="password" name="newpass_2" size="20" />'
               .&Apache::lonhtmlcommon::row_closure(1)
               .&Apache::lonhtmlcommon::end_pick_box();
     $output .= '<p><input type="button" value="'.$lt{'changepass'}.'" onclick="send();" /></p>'
@@ -1570,7 +1576,7 @@ ENDERROR
         return 1;
     }
     my ($ckey,$n1key,$n2key)=split(/&/,$tmpinfo);
-    # 
+    #
     $currentpass = &Apache::loncommon::des_decrypt($ckey ,$currentpass);
     $newpass1    = &Apache::loncommon::des_decrypt($n1key,$newpass1);
     $newpass2    = &Apache::loncommon::des_decrypt($n2key,$newpass2);
@@ -2248,7 +2254,7 @@ sub handler {
     }elsif($env{'form.action'} eq 'changepass'){
         &passwordchanger($r);
     }elsif($env{'form.action'} eq 'verify_and_change_pass'){
-        &verify_and_change_password($r);
+        &verify_and_change_password($r,'preferences');
     }elsif($env{'form.action'} eq 'changescreenname'){
         &screennamechanger($r);
     }elsif($env{'form.action'} eq 'verify_and_change_screenname'){