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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' => array( 'themes', '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          foreach ( (array) $core_classes[ $class ] as $required )
  41              require_once( ABSPATH . 'wp-admin/includes/class-wp-' . $required . '-list-table.php' );
  42          return new $class;
  43      }
  44  
  45      return false;
  46  }
  47  
  48  /**
  49   * Register column headers for a particular screen.
  50   *
  51   * @since 2.7.0
  52   *
  53   * @param string $screen The handle for the screen to add help to. This is usually the hook name returned by the add_*_page() functions.
  54   * @param array $columns An array of columns with column IDs as the keys and translated column names as the values
  55   * @see get_column_headers(), print_column_headers(), get_hidden_columns()
  56   */
  57  function register_column_headers($screen, $columns) {
  58      $wp_list_table = new _WP_List_Table_Compat($screen, $columns);
  59  }
  60  
  61  /**
  62   * Prints column headers for a particular screen.
  63   *
  64   * @since 2.7.0
  65   */
  66  function print_column_headers($screen, $id = true) {
  67      $wp_list_table = new _WP_List_Table_Compat($screen);
  68  
  69      $wp_list_table->print_column_headers($id);
  70  }
  71  
  72  /**
  73   * Helper class to be used only by back compat functions
  74   *
  75   * @since 3.1.0
  76   */
  77  class _WP_List_Table_Compat extends WP_List_Table {
  78      var $_screen;
  79      var $_columns;
  80  
  81  	function _WP_List_Table_Compat( $screen, $columns = array() ) {
  82          if ( is_string( $screen ) )
  83              $screen = convert_to_screen( $screen );
  84  
  85          $this->_screen = $screen;
  86  
  87          if ( !empty( $columns ) ) {
  88              $this->_columns = $columns;
  89              add_filter( 'manage_' . $screen->id . '_columns', array( &$this, 'get_columns' ), 0 );
  90          }
  91      }
  92  
  93  	function get_column_info() {
  94          $columns = get_column_headers( $this->_screen );
  95          $hidden = get_hidden_columns( $this->_screen );
  96          $sortable = array();
  97  
  98          return array( $columns, $hidden, $sortable );
  99      }
 100  
 101  	function get_columns() {
 102          return $this->_columns;
 103      }
 104  }