_WP_List_Table_Compat

15class _WP_List_Table_Compat extends WP_List_Table {16	public $_screen;17	public $_columns;18 19	/**20	 * Constructor.21	 *22	 * @since 3.1.023	 *24	 * @param string|WP_Screen $screen  The screen hook name or screen object.25	 * @param string[]         $columns An array of columns with column IDs as the keys26	 *                                  and translated column names as the values.27	 */28	public function __construct( $screen, $columns = array() ) {29		if ( is_string( $screen ) ) {30			$screen = convert_to_screen( $screen );31		}32 33		$this->_screen = $screen;34 35		if ( ! empty( $columns ) ) {36			$this->_columns = $columns;37			add_filter( 'manage_' . $screen->id . '_columns', array( $this, 'get_columns' ), 0 );38		}39	}40 41	/**42	 * Gets a list of all, hidden, and sortable columns.43	 *44	 * @since 3.1.045	 *46	 * @return array47	 */48	protected function get_column_info() {49		$columns  = get_column_headers( $this->_screen );50		$hidden   = get_hidden_columns( $this->_screen );51		$sortable = array();52		$primary  = $this->get_default_primary_column_name();53 54		return array( $columns, $hidden, $sortable, $primary );55	}56 57	/**58	 * Gets a list of columns.59	 *60	 * @since 3.1.061	 *62	 * @return array63	 */64	public function get_columns() {65		return $this->_columns;66	}67}