/**
* adds a new format to the list of supported formats.
* handles removing conflicting and less specific
* formats at the same time.
*
* @param string $format one of PORTFOLIO_FORMAT_XX
*
* @return void
*/
protected function add_format($format)
{
if (in_array($format, $this->supportedformats)) {
return;
}
$this->supportedformats = portfolio_most_specific_formats(array($format), $this->supportedformats);
}
public function set_formats($formats = null)
{
if (is_string($formats)) {
$formats = array($formats);
}
if (empty($formats)) {
$formats = array();
}
if (empty($this->callbackclass)) {
throw new portfolio_button_exception('noclassbeforeformats', 'portfolio');
}
$callerformats = call_user_func(array($this->callbackclass, 'base_supported_formats'));
$this->formats = portfolio_most_specific_formats($formats, $callerformats);
}
