protected function getOutput()
{
$this->setBlock(false);
$email = $force_default = $a_open = $a_close = '';
if (($source = $this->source->getValue()) instanceof \User) {
// parameter 'user'
$email = $source->getEmail();
$a_open = '<a href="' . $source->getUserPage()->getFullURL() . '">';
$a_close = '</a>';
} elseif (is_string($source)) {
// parameter 'email'
$email = $source;
} else {
$force_default = '&f=y';
}
$email_md5 = md5(strtolower(trim($email)));
$size = 's=' . $this->size->getOutput();
// $rating = $this->rating->hasBeenSet() ? '&r='.$this->rating->getOutput() : '';
$rating = '&r=g';
// "suitable for display on all websites with any audience type."
return $a_open . '<img class="' . $this->getCSSClasses() . '" src="http://www.gravatar.com/avatar/' . $email_md5 . '?' . $size . $rating . $force_default . '&d=mm" alt="" />' . $a_close;
}