1<?php
  2/**
  3 * Helper functions for displaying a list of items in an ajaxified HTML table.
  4 *
  5 * @package WordPress
  6 * @subpackage List_Table
  7 * @since 4.7.0
  8 */
  9
 10/**
 11 * Helper class to be used only by back compat functions.
 12 *
 13 * @since 3.1.0
 14 */
 15class _WP_List_Table_Compat extends WP_List_Table {
 16	public $_screen;
 17	public $_columns;
 18
 19	/**
 20	 * Constructor.
 21	 *
 22	 * @since 3.1.0
 23	 *
 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 keys
 26	 *                                  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 3.1.0
 45	 *
 46	 * @return array
 47	 */
 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 3.1.0
 61	 *
 62	 * @return array
 63	 */
 64	public function get_columns() {
 65		return $this->_columns;
 66	}
 67}
 68