We have already several choices available and soon in moodle too. Check
http://moodle.org/mod/forum/discuss.php?d=96160
TinyMCE, FCKEditor, Xinha, YUIRTE and a couple of other editor work with the latest versions of Safari and Opera. I have used this function in moodlelib.php to allow those browsers to use editor:
function can_use_html_editor() {
global $USER, $CFG;
if (!empty($USER->htmleditor) and !empty($CFG->htmleditor)) {
if ( isset( $_SERVER ) ) {
$sAgent = $_SERVER['HTTP_USER_AGENT'] ;
}
else {
global $HTTP_SERVER_VARS ;
if ( isset( $HTTP_SERVER_VARS ) ) {
$sAgent = $HTTP_SERVER_VARS['HTTP_USER_AGENT'] ;
}
else {
global $HTTP_USER_AGENT ;
$sAgent = $HTTP_USER_AGENT ;
}
}
if ( strpos($sAgent, 'MSIE') !== false && strpos($sAgent, 'mac') === false && strpos($sAgent, 'Opera') === false )
{
$iVersion = (float)substr($sAgent, strpos($sAgent, 'MSIE') + 5, 3) ;
return ($iVersion >= 5.5) ;
}
else if ( strpos($sAgent, 'Gecko/') !== false )
{
$iVersion = (int)substr($sAgent, strpos($sAgent, 'Gecko/') + 6, 8) ;
return ($iVersion >= 20030210) ;
}
else if ( strpos($sAgent, 'Opera/') !== false )
{
$fVersion = (float)substr($sAgent, strpos($sAgent, 'Opera/') + 6, 4) ;
return ($fVersion >= 9.5) ;
}
else if ( preg_match( "|AppleWebKit/(\d+)|i", $sAgent, $matches ) )
{
$iVersion = $matches[1] ;
return ( $matches[1] >= 522 ) ;
}
}
else return false ;
}