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   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 3.1.0
   8   */
   9  
  10  /**
  11   * Fetch an instance of a WP_List_Table class.
  12   *
  13   * @access private
  14   * @since 3.1.0
  15   *
  16   * @param string $class The type of the list table, which is the class name.
  17   * @return object|bool Object on success, false if the class does not exist.
  18   */
  19  function _get_list_table( $class ) {
  20      $core_classes = array(
  21          //Site Admin
  22          'WP_Posts_List_Table' => 'posts',
  23          'WP_Media_List_Table' => 'media',
  24          'WP_Terms_List_Table' => 'terms',
  25          'WP_Users_List_Table' => 'users',
  26          'WP_Comments_List_Table' => 'comments',
  27          'WP_Post_Comments_List_Table' => 'comments',
  28          'WP_Links_List_Table' => 'links',
  29          'WP_Plugin_Install_List_Table' => 'plugin-install',
  30          'WP_Themes_List_Table' => 'themes',
  31          'WP_Theme_Install_List_Table' => 'theme-install',
  32          'WP_Plugins_List_Table' => 'plugins',
  33          // Network Admin
  34          'WP_MS_Sites_List_Table' => 'ms-sites',
  35          'WP_MS_Users_List_Table' => 'ms-users',
  36          'WP_MS_Themes_List_Table' => 'ms-themes',
  37      );
  38  
  39      if ( isset( $core_classes[ $class ] ) ) {
  40          require_once( ABSPATH . 'wp-admin/includes/class-wp-' . $core_classes[ $class ] . '-list-table.php' );
  41          return new $class;
  42      }
  43  
  44      return false;
  45  }
  46  
  47  /**
  48   * Register column headers for a particular screen.
  49   *
  50   * @since 2.7.0
  51   *
  52   * @param string $screen The handle for the screen to add help to. This is usually the hook name returned by the add_*_page() functions.
  53   * @param array $columns An array of columns with column IDs as the keys and translated column names as the values
  54   * @see get_column_headers(), print_column_headers(), get_hidden_columns()
  55   */
  56  function register_column_headers($screen, $columns) {
  57      $wp_list_table = new _WP_List_Table_Compat($screen, $columns);
  58  }
  59  
  60  /**
  61   * Prints column headers for a particular screen.
  62   *
  63   * @since 2.7.0
  64   */
  65  function print_column_headers($screen, $id = true) {
  66      $wp_list_table = new _WP_List_Table_Compat($screen);
  67  
  68      $wp_list_table->print_column_headers($id);
  69  }
  70  
  71  /**
  72   * Helper class to be used only by back compat functions
  73   *
  74   * @since 3.1.0
  75   */
  76  class _WP_List_Table_Compat extends WP_List_Table {
  77      var $_screen;
  78      var $_columns;
  79  
  80  	function _WP_List_Table_Compat( $screen, $columns = array() ) {
  81          if ( is_string( $screen ) )
  82              $screen = convert_to_screen( $screen );
  83  
  84          $this->_screen = $screen;
  85  
  86          if ( !empty( $columns ) ) {
  87              $this->_columns = $columns;
  88              add_filter( 'manage_' . $screen->id . '_columns', array( &$this, 'get_columns' ), 0 );
  89          }
  90      }
  91  
  92  	function get_column_info() {
  93          $columns = get_column_headers( $this->_screen );
  94          $hidden = get_hidden_columns( $this->_screen );
  95          $sortable = array();
  96  
  97          return array( $columns, $hidden, $sortable );
  98      }
  99  
 100  	function get_columns() {
 101          return $this->_columns;
 102      }
 103  }
 104  ?>