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/wp-admin/includes/ -> class-wp-list-table.php (source)

   1  <?php
   2  /**
   3   * Administration API: WP_List_Table class
   4   *
   5   * @package WordPress
   6   * @subpackage List_Table
   7   * @since 3.1.0
   8   */
   9  
  10  /**
  11   * Base class for displaying a list of items in an ajaxified HTML table.
  12   *
  13   * @since 3.1.0
  14   * @access private
  15   */
  16  class WP_List_Table {
  17  
  18      /**
  19       * The current list of items.
  20       *
  21       * @since 3.1.0
  22       * @var array
  23       */
  24      public $items;
  25  
  26      /**
  27       * Various information about the current table.
  28       *
  29       * @since 3.1.0
  30       * @var array
  31       */
  32      protected $_args;
  33  
  34      /**
  35       * Various information needed for displaying the pagination.
  36       *
  37       * @since 3.1.0
  38       * @var array
  39       */
  40      protected $_pagination_args = array();
  41  
  42      /**
  43       * The current screen.
  44       *
  45       * @since 3.1.0
  46       * @var WP_Screen
  47       */
  48      protected $screen;
  49  
  50      /**
  51       * Cached bulk actions.
  52       *
  53       * @since 3.1.0
  54       * @var array
  55       */
  56      private $_actions;
  57  
  58      /**
  59       * Cached pagination output.
  60       *
  61       * @since 3.1.0
  62       * @var string
  63       */
  64      private $_pagination;
  65  
  66      /**
  67       * The view switcher modes.
  68       *
  69       * @since 4.1.0
  70       * @var array
  71       */
  72      protected $modes = array();
  73  
  74      /**
  75       * Stores the value returned by ->get_column_info().
  76       *
  77       * @since 4.1.0
  78       * @var array
  79       */
  80      protected $_column_headers;
  81  
  82      /**
  83       * {@internal Missing Summary}
  84       *
  85       * @var array
  86       */
  87      protected $compat_fields = array( '_args', '_pagination_args', 'screen', '_actions', '_pagination' );
  88  
  89      /**
  90       * {@internal Missing Summary}
  91       *
  92       * @var array
  93       */
  94      protected $compat_methods = array(
  95          'set_pagination_args',
  96          'get_views',
  97          'get_bulk_actions',
  98          'bulk_actions',
  99          'row_actions',
 100          'months_dropdown',
 101          'view_switcher',
 102          'comments_bubble',
 103          'get_items_per_page',
 104          'pagination',
 105          'get_sortable_columns',
 106          'get_column_info',
 107          'get_table_classes',
 108          'display_tablenav',
 109          'extra_tablenav',
 110          'single_row_columns',
 111      );
 112  
 113      /**
 114       * Constructor.
 115       *
 116       * The child class should call this constructor from its own constructor to override
 117       * the default $args.
 118       *
 119       * @since 3.1.0
 120       *
 121       * @param array|string $args {
 122       *     Array or string of arguments.
 123       *
 124       *     @type string $plural   Plural value used for labels and the objects being listed.
 125       *                            This affects things such as CSS class-names and nonces used
 126       *                            in the list table, e.g. 'posts'. Default empty.
 127       *     @type string $singular Singular label for an object being listed, e.g. 'post'.
 128       *                            Default empty
 129       *     @type bool   $ajax     Whether the list table supports Ajax. This includes loading
 130       *                            and sorting data, for example. If true, the class will call
 131       *                            the _js_vars() method in the footer to provide variables
 132       *                            to any scripts handling Ajax events. Default false.
 133       *     @type string $screen   String containing the hook name used to determine the current
 134       *                            screen. If left null, the current screen will be automatically set.
 135       *                            Default null.
 136       * }
 137       */
 138  	public function __construct( $args = array() ) {
 139          $args = wp_parse_args(
 140              $args,
 141              array(
 142                  'plural'   => '',
 143                  'singular' => '',
 144                  'ajax'     => false,
 145                  'screen'   => null,
 146              )
 147          );
 148  
 149          $this->screen = convert_to_screen( $args['screen'] );
 150  
 151          add_filter( "manage_{$this->screen->id}_columns", array( $this, 'get_columns' ), 0 );
 152  
 153          if ( ! $args['plural'] ) {
 154              $args['plural'] = $this->screen->base;
 155          }
 156  
 157          $args['plural']   = sanitize_key( $args['plural'] );
 158          $args['singular'] = sanitize_key( $args['singular'] );
 159  
 160          $this->_args = $args;
 161  
 162          if ( $args['ajax'] ) {
 163              // wp_enqueue_script( 'list-table' );
 164              add_action( 'admin_footer', array( $this, '_js_vars' ) );
 165          }
 166  
 167          if ( empty( $this->modes ) ) {
 168              $this->modes = array(
 169                  'list'    => __( 'Compact view' ),
 170                  'excerpt' => __( 'Extended view' ),
 171              );
 172          }
 173      }
 174  
 175      /**
 176       * Make private properties readable for backward compatibility.
 177       *
 178       * @since 4.0.0
 179       *
 180       * @param string $name Property to get.
 181       * @return mixed Property.
 182       */
 183  	public function __get( $name ) {
 184          if ( in_array( $name, $this->compat_fields, true ) ) {
 185              return $this->$name;
 186          }
 187      }
 188  
 189      /**
 190       * Make private properties settable for backward compatibility.
 191       *
 192       * @since 4.0.0
 193       *
 194       * @param string $name  Property to check if set.
 195       * @param mixed  $value Property value.
 196       * @return mixed Newly-set property.
 197       */
 198  	public function __set( $name, $value ) {
 199          if ( in_array( $name, $this->compat_fields, true ) ) {
 200              return $this->$name = $value;
 201          }
 202      }
 203  
 204      /**
 205       * Make private properties checkable for backward compatibility.
 206       *
 207       * @since 4.0.0
 208       *
 209       * @param string $name Property to check if set.
 210       * @return bool Whether the property is a back-compat property and it is set.
 211       */
 212  	public function __isset( $name ) {
 213          if ( in_array( $name, $this->compat_fields, true ) ) {
 214              return isset( $this->$name );
 215          }
 216  
 217          return false;
 218      }
 219  
 220      /**
 221       * Make private properties un-settable for backward compatibility.
 222       *
 223       * @since 4.0.0
 224       *
 225       * @param string $name Property to unset.
 226       */
 227  	public function __unset( $name ) {
 228          if ( in_array( $name, $this->compat_fields, true ) ) {
 229              unset( $this->$name );
 230          }
 231      }
 232  
 233      /**
 234       * Make private/protected methods readable for backward compatibility.
 235       *
 236       * @since 4.0.0
 237       *
 238       * @param string $name      Method to call.
 239       * @param array  $arguments Arguments to pass when calling.
 240       * @return mixed|bool Return value of the callback, false otherwise.
 241       */
 242  	public function __call( $name, $arguments ) {
 243          if ( in_array( $name, $this->compat_methods, true ) ) {
 244              return $this->$name( ...$arguments );
 245          }
 246          return false;
 247      }
 248  
 249      /**
 250       * Checks the current user's permissions
 251       *
 252       * @since 3.1.0
 253       * @abstract
 254       */
 255  	public function ajax_user_can() {
 256          die( 'function WP_List_Table::ajax_user_can() must be overridden in a subclass.' );
 257      }
 258  
 259      /**
 260       * Prepares the list of items for displaying.
 261       *
 262       * @uses WP_List_Table::set_pagination_args()
 263       *
 264       * @since 3.1.0
 265       * @abstract
 266       */
 267  	public function prepare_items() {
 268          die( 'function WP_List_Table::prepare_items() must be overridden in a subclass.' );
 269      }
 270  
 271      /**
 272       * An internal method that sets all the necessary pagination arguments
 273       *
 274       * @since 3.1.0
 275       *
 276       * @param array|string $args Array or string of arguments with information about the pagination.
 277       */
 278  	protected function set_pagination_args( $args ) {
 279          $args = wp_parse_args(
 280              $args,
 281              array(
 282                  'total_items' => 0,
 283                  'total_pages' => 0,
 284                  'per_page'    => 0,
 285              )
 286          );
 287  
 288          if ( ! $args['total_pages'] && $args['per_page'] > 0 ) {
 289              $args['total_pages'] = ceil( $args['total_items'] / $args['per_page'] );
 290          }
 291  
 292          // Redirect if page number is invalid and headers are not already sent.
 293          if ( ! headers_sent() && ! wp_doing_ajax() && $args['total_pages'] > 0 && $this->get_pagenum() > $args['total_pages'] ) {
 294              wp_redirect( add_query_arg( 'paged', $args['total_pages'] ) );
 295              exit;
 296          }
 297  
 298          $this->_pagination_args = $args;
 299      }
 300  
 301      /**
 302       * Access the pagination args.
 303       *
 304       * @since 3.1.0
 305       *
 306       * @param string $key Pagination argument to retrieve. Common values include 'total_items',
 307       *                    'total_pages', 'per_page', or 'infinite_scroll'.
 308       * @return int Number of items that correspond to the given pagination argument.
 309       */
 310  	public function get_pagination_arg( $key ) {
 311          if ( 'page' === $key ) {
 312              return $this->get_pagenum();
 313          }
 314  
 315          if ( isset( $this->_pagination_args[ $key ] ) ) {
 316              return $this->_pagination_args[ $key ];
 317          }
 318  
 319          return 0;
 320      }
 321  
 322      /**
 323       * Whether the table has items to display or not
 324       *
 325       * @since 3.1.0
 326       *
 327       * @return bool
 328       */
 329  	public function has_items() {
 330          return ! empty( $this->items );
 331      }
 332  
 333      /**
 334       * Message to be displayed when there are no items
 335       *
 336       * @since 3.1.0
 337       */
 338  	public function no_items() {
 339          _e( 'No items found.' );
 340      }
 341  
 342      /**
 343       * Displays the search box.
 344       *
 345       * @since 3.1.0
 346       *
 347       * @param string $text     The 'submit' button label.
 348       * @param string $input_id ID attribute value for the search input field.
 349       */
 350  	public function search_box( $text, $input_id ) {
 351          if ( empty( $_REQUEST['s'] ) && ! $this->has_items() ) {
 352              return;
 353          }
 354  
 355          $input_id = $input_id . '-search-input';
 356  
 357          if ( ! empty( $_REQUEST['orderby'] ) ) {
 358              echo '<input type="hidden" name="orderby" value="' . esc_attr( $_REQUEST['orderby'] ) . '" />';
 359          }
 360          if ( ! empty( $_REQUEST['order'] ) ) {
 361              echo '<input type="hidden" name="order" value="' . esc_attr( $_REQUEST['order'] ) . '" />';
 362          }
 363          if ( ! empty( $_REQUEST['post_mime_type'] ) ) {
 364              echo '<input type="hidden" name="post_mime_type" value="' . esc_attr( $_REQUEST['post_mime_type'] ) . '" />';
 365          }
 366          if ( ! empty( $_REQUEST['detached'] ) ) {
 367              echo '<input type="hidden" name="detached" value="' . esc_attr( $_REQUEST['detached'] ) . '" />';
 368          }
 369          ?>
 370  <p class="search-box">
 371      <label class="screen-reader-text" for="<?php echo esc_attr( $input_id ); ?>"><?php echo $text; ?>:</label>
 372      <input type="search" id="<?php echo esc_attr( $input_id ); ?>" name="s" value="<?php _admin_search_query(); ?>" />
 373          <?php submit_button( $text, '', '', false, array( 'id' => 'search-submit' ) ); ?>
 374  </p>
 375          <?php
 376      }
 377  
 378      /**
 379       * Gets the list of views available on this table.
 380       *
 381       * The format is an associative array:
 382       * - `'id' => 'link'`
 383       *
 384       * @since 3.1.0
 385       *
 386       * @return array
 387       */
 388  	protected function get_views() {
 389          return array();
 390      }
 391  
 392      /**
 393       * Displays the list of views available on this table.
 394       *
 395       * @since 3.1.0
 396       */
 397  	public function views() {
 398          $views = $this->get_views();
 399          /**
 400           * Filters the list of available list table views.
 401           *
 402           * The dynamic portion of the hook name, `$this->screen->id`, refers
 403           * to the ID of the current screen.
 404           *
 405           * @since 3.1.0
 406           *
 407           * @param string[] $views An array of available list table views.
 408           */
 409          $views = apply_filters( "views_{$this->screen->id}", $views );
 410  
 411          if ( empty( $views ) ) {
 412              return;
 413          }
 414  
 415          $this->screen->render_screen_reader_content( 'heading_views' );
 416  
 417          echo "<ul class='subsubsub'>\n";
 418          foreach ( $views as $class => $view ) {
 419              $views[ $class ] = "\t<li class='$class'>$view";
 420          }
 421          echo implode( " |</li>\n", $views ) . "</li>\n";
 422          echo '</ul>';
 423      }
 424  
 425      /**
 426       * Retrieves the list of bulk actions available for this table.
 427       *
 428       * The format is an associative array where each element represents either a top level option value and label, or
 429       * an array representing an optgroup and its options.
 430       *
 431       * For a standard option, the array element key is the field value and the array element value is the field label.
 432       *
 433       * For an optgroup, the array element key is the label and the array element value is an associative array of
 434       * options as above.
 435       *
 436       * Example:
 437       *
 438       *     [
 439       *         'edit'         => 'Edit',
 440       *         'delete'       => 'Delete',
 441       *         'Change State' => [
 442       *             'feature' => 'Featured',
 443       *             'sale'    => 'On Sale',
 444       *         ]
 445       *     ]
 446       *
 447       * @since 3.1.0
 448       * @since 5.6.0 A bulk action can now contain an array of options in order to create an optgroup.
 449       *
 450       * @return array
 451       */
 452  	protected function get_bulk_actions() {
 453          return array();
 454      }
 455  
 456      /**
 457       * Displays the bulk actions dropdown.
 458       *
 459       * @since 3.1.0
 460       *
 461       * @param string $which The location of the bulk actions: 'top' or 'bottom'.
 462       *                      This is designated as optional for backward compatibility.
 463       */
 464  	protected function bulk_actions( $which = '' ) {
 465          if ( is_null( $this->_actions ) ) {
 466              $this->_actions = $this->get_bulk_actions();
 467  
 468              /**
 469               * Filters the items in the bulk actions menu of the list table.
 470               *
 471               * The dynamic portion of the hook name, `$this->screen->id`, refers
 472               * to the ID of the current screen.
 473               *
 474               * @since 3.1.0
 475               * @since 5.6.0 A bulk action can now contain an array of options in order to create an optgroup.
 476               *
 477               * @param array $actions An array of the available bulk actions.
 478               */
 479              $this->_actions = apply_filters( "bulk_actions-{$this->screen->id}", $this->_actions ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
 480  
 481              $two = '';
 482          } else {
 483              $two = '2';
 484          }
 485  
 486          if ( empty( $this->_actions ) ) {
 487              return;
 488          }
 489  
 490          echo '<label for="bulk-action-selector-' . esc_attr( $which ) . '" class="screen-reader-text">' . __( 'Select bulk action' ) . '</label>';
 491          echo '<select name="action' . $two . '" id="bulk-action-selector-' . esc_attr( $which ) . "\">\n";
 492          echo '<option value="-1">' . __( 'Bulk actions' ) . "</option>\n";
 493  
 494          foreach ( $this->_actions as $key => $value ) {
 495              if ( is_array( $value ) ) {
 496                  echo "\t" . '<optgroup label="' . esc_attr( $key ) . '">' . "\n";
 497  
 498                  foreach ( $value as $name => $title ) {
 499                      $class = ( 'edit' === $name ) ? ' class="hide-if-no-js"' : '';
 500  
 501                      echo "\t\t" . '<option value="' . esc_attr( $name ) . '"' . $class . '>' . $title . "</option>\n";
 502                  }
 503                  echo "\t" . "</optgroup>\n";
 504              } else {
 505                  $class = ( 'edit' === $key ) ? ' class="hide-if-no-js"' : '';
 506  
 507                  echo "\t" . '<option value="' . esc_attr( $key ) . '"' . $class . '>' . $value . "</option>\n";
 508              }
 509          }
 510  
 511          echo "</select>\n";
 512  
 513          submit_button( __( 'Apply' ), 'action', '', false, array( 'id' => "doaction$two" ) );
 514          echo "\n";
 515      }
 516  
 517      /**
 518       * Gets the current action selected from the bulk actions dropdown.
 519       *
 520       * @since 3.1.0
 521       *
 522       * @return string|false The action name. False if no action was selected.
 523       */
 524  	public function current_action() {
 525          if ( isset( $_REQUEST['filter_action'] ) && ! empty( $_REQUEST['filter_action'] ) ) {
 526              return false;
 527          }
 528  
 529          if ( isset( $_REQUEST['action'] ) && -1 != $_REQUEST['action'] ) {
 530              return $_REQUEST['action'];
 531          }
 532  
 533          return false;
 534      }
 535  
 536      /**
 537       * Generates the required HTML for a list of row action links.
 538       *
 539       * @since 3.1.0
 540       *
 541       * @param string[] $actions        An array of action links.
 542       * @param bool     $always_visible Whether the actions should be always visible.
 543       * @return string The HTML for the row actions.
 544       */
 545  	protected function row_actions( $actions, $always_visible = false ) {
 546          $action_count = count( $actions );
 547  
 548          if ( ! $action_count ) {
 549              return '';
 550          }
 551  
 552          $mode = get_user_setting( 'posts_list_mode', 'list' );
 553  
 554          if ( 'excerpt' === $mode ) {
 555              $always_visible = true;
 556          }
 557  
 558          $out = '<div class="' . ( $always_visible ? 'row-actions visible' : 'row-actions' ) . '">';
 559  
 560          $i = 0;
 561  
 562          foreach ( $actions as $action => $link ) {
 563              ++$i;
 564  
 565              $sep = ( $i < $action_count ) ? ' | ' : '';
 566  
 567              $out .= "<span class='$action'>$link$sep</span>";
 568          }
 569  
 570          $out .= '</div>';
 571  
 572          $out .= '<button type="button" class="toggle-row"><span class="screen-reader-text">' . __( 'Show more details' ) . '</span></button>';
 573  
 574          return $out;
 575      }
 576  
 577      /**
 578       * Displays a dropdown for filtering items in the list table by month.
 579       *
 580       * @since 3.1.0
 581       *
 582       * @global wpdb      $wpdb      WordPress database abstraction object.
 583       * @global WP_Locale $wp_locale WordPress date and time locale object.
 584       *
 585       * @param string $post_type The post type.
 586       */
 587  	protected function months_dropdown( $post_type ) {
 588          global $wpdb, $wp_locale;
 589  
 590          /**
 591           * Filters whether to remove the 'Months' drop-down from the post list table.
 592           *
 593           * @since 4.2.0
 594           *
 595           * @param bool   $disable   Whether to disable the drop-down. Default false.
 596           * @param string $post_type The post type.
 597           */
 598          if ( apply_filters( 'disable_months_dropdown', false, $post_type ) ) {
 599              return;
 600          }
 601  
 602          /**
 603           * Filters to short-circuit performing the months dropdown query.
 604           *
 605           * @since 5.7.0
 606           *
 607           * @param object[]|false $months   'Months' drop-down results. Default false.
 608           * @param string         $post_type The post type.
 609           */
 610          $months = apply_filters( 'pre_months_dropdown_query', false, $post_type );
 611  
 612          if ( ! is_array( $months ) ) {
 613              $extra_checks = "AND post_status != 'auto-draft'";
 614              if ( ! isset( $_GET['post_status'] ) || 'trash' !== $_GET['post_status'] ) {
 615                  $extra_checks .= " AND post_status != 'trash'";
 616              } elseif ( isset( $_GET['post_status'] ) ) {
 617                  $extra_checks = $wpdb->prepare( ' AND post_status = %s', $_GET['post_status'] );
 618              }
 619  
 620              $months = $wpdb->get_results(
 621                  $wpdb->prepare(
 622                      "
 623                  SELECT DISTINCT YEAR( post_date ) AS year, MONTH( post_date ) AS month
 624                  FROM $wpdb->posts
 625                  WHERE post_type = %s
 626                  $extra_checks
 627                  ORDER BY post_date DESC
 628              ",
 629                      $post_type
 630                  )
 631              );
 632          }
 633  
 634          /**
 635           * Filters the 'Months' drop-down results.
 636           *
 637           * @since 3.7.0
 638           *
 639           * @param object[] $months    Array of the months drop-down query results.
 640           * @param string   $post_type The post type.
 641           */
 642          $months = apply_filters( 'months_dropdown_results', $months, $post_type );
 643  
 644          $month_count = count( $months );
 645  
 646          if ( ! $month_count || ( 1 == $month_count && 0 == $months[0]->month ) ) {
 647              return;
 648          }
 649  
 650          $m = isset( $_GET['m'] ) ? (int) $_GET['m'] : 0;
 651          ?>
 652          <label for="filter-by-date" class="screen-reader-text"><?php echo get_post_type_object( $post_type )->labels->filter_by_date; ?></label>
 653          <select name="m" id="filter-by-date">
 654              <option<?php selected( $m, 0 ); ?> value="0"><?php _e( 'All dates' ); ?></option>
 655          <?php
 656          foreach ( $months as $arc_row ) {
 657              if ( 0 == $arc_row->year ) {
 658                  continue;
 659              }
 660  
 661              $month = zeroise( $arc_row->month, 2 );
 662              $year  = $arc_row->year;
 663  
 664              printf(
 665                  "<option %s value='%s'>%s</option>\n",
 666                  selected( $m, $year . $month, false ),
 667                  esc_attr( $arc_row->year . $month ),
 668                  /* translators: 1: Month name, 2: 4-digit year. */
 669                  sprintf( __( '%1$s %2$d' ), $wp_locale->get_month( $month ), $year )
 670              );
 671          }
 672          ?>
 673          </select>
 674          <?php
 675      }
 676  
 677      /**
 678       * Displays a view switcher.
 679       *
 680       * @since 3.1.0
 681       *
 682       * @param string $current_mode
 683       */
 684  	protected function view_switcher( $current_mode ) {
 685          ?>
 686          <input type="hidden" name="mode" value="<?php echo esc_attr( $current_mode ); ?>" />
 687          <div class="view-switch">
 688          <?php
 689          foreach ( $this->modes as $mode => $title ) {
 690              $classes      = array( 'view-' . $mode );
 691              $aria_current = '';
 692  
 693              if ( $current_mode === $mode ) {
 694                  $classes[]    = 'current';
 695                  $aria_current = ' aria-current="page"';
 696              }
 697  
 698              printf(
 699                  "<a href='%s' class='%s' id='view-switch-$mode'$aria_current><span class='screen-reader-text'>%s</span></a>\n",
 700                  esc_url( remove_query_arg( 'attachment-filter', add_query_arg( 'mode', $mode ) ) ),
 701                  implode( ' ', $classes ),
 702                  $title
 703              );
 704          }
 705          ?>
 706          </div>
 707          <?php
 708      }
 709  
 710      /**
 711       * Displays a comment count bubble.
 712       *
 713       * @since 3.1.0
 714       *
 715       * @param int $post_id          The post ID.
 716       * @param int $pending_comments Number of pending comments.
 717       */
 718  	protected function comments_bubble( $post_id, $pending_comments ) {
 719          $approved_comments = get_comments_number();
 720  
 721          $approved_comments_number = number_format_i18n( $approved_comments );
 722          $pending_comments_number  = number_format_i18n( $pending_comments );
 723  
 724          $approved_only_phrase = sprintf(
 725              /* translators: %s: Number of comments. */
 726              _n( '%s comment', '%s comments', $approved_comments ),
 727              $approved_comments_number
 728          );
 729  
 730          $approved_phrase = sprintf(
 731              /* translators: %s: Number of comments. */
 732              _n( '%s approved comment', '%s approved comments', $approved_comments ),
 733              $approved_comments_number
 734          );
 735  
 736          $pending_phrase = sprintf(
 737              /* translators: %s: Number of comments. */
 738              _n( '%s pending comment', '%s pending comments', $pending_comments ),
 739              $pending_comments_number
 740          );
 741  
 742          if ( ! $approved_comments && ! $pending_comments ) {
 743              // No comments at all.
 744              printf(
 745                  '<span aria-hidden="true">&#8212;</span><span class="screen-reader-text">%s</span>',
 746                  __( 'No comments' )
 747              );
 748          } elseif ( $approved_comments && 'trash' === get_post_status( $post_id ) ) {
 749              // Don't link the comment bubble for a trashed post.
 750              printf(
 751                  '<span class="post-com-count post-com-count-approved"><span class="comment-count-approved" aria-hidden="true">%s</span><span class="screen-reader-text">%s</span></span>',
 752                  $approved_comments_number,
 753                  $pending_comments ? $approved_phrase : $approved_only_phrase
 754              );
 755          } elseif ( $approved_comments ) {
 756              // Link the comment bubble to approved comments.
 757              printf(
 758                  '<a href="%s" class="post-com-count post-com-count-approved"><span class="comment-count-approved" aria-hidden="true">%s</span><span class="screen-reader-text">%s</span></a>',
 759                  esc_url(
 760                      add_query_arg(
 761                          array(
 762                              'p'              => $post_id,
 763                              'comment_status' => 'approved',
 764                          ),
 765                          admin_url( 'edit-comments.php' )
 766                      )
 767                  ),
 768                  $approved_comments_number,
 769                  $pending_comments ? $approved_phrase : $approved_only_phrase
 770              );
 771          } else {
 772              // Don't link the comment bubble when there are no approved comments.
 773              printf(
 774                  '<span class="post-com-count post-com-count-no-comments"><span class="comment-count comment-count-no-comments" aria-hidden="true">%s</span><span class="screen-reader-text">%s</span></span>',
 775                  $approved_comments_number,
 776                  $pending_comments ? __( 'No approved comments' ) : __( 'No comments' )
 777              );
 778          }
 779  
 780          if ( $pending_comments ) {
 781              printf(
 782                  '<a href="%s" class="post-com-count post-com-count-pending"><span class="comment-count-pending" aria-hidden="true">%s</span><span class="screen-reader-text">%s</span></a>',
 783                  esc_url(
 784                      add_query_arg(
 785                          array(
 786                              'p'              => $post_id,
 787                              'comment_status' => 'moderated',
 788                          ),
 789                          admin_url( 'edit-comments.php' )
 790                      )
 791                  ),
 792                  $pending_comments_number,
 793                  $pending_phrase
 794              );
 795          } else {
 796              printf(
 797                  '<span class="post-com-count post-com-count-pending post-com-count-no-pending"><span class="comment-count comment-count-no-pending" aria-hidden="true">%s</span><span class="screen-reader-text">%s</span></span>',
 798                  $pending_comments_number,
 799                  $approved_comments ? __( 'No pending comments' ) : __( 'No comments' )
 800              );
 801          }
 802      }
 803  
 804      /**
 805       * Gets the current page number.
 806       *
 807       * @since 3.1.0
 808       *
 809       * @return int
 810       */
 811  	public function get_pagenum() {
 812          $pagenum = isset( $_REQUEST['paged'] ) ? absint( $_REQUEST['paged'] ) : 0;
 813  
 814          if ( isset( $this->_pagination_args['total_pages'] ) && $pagenum > $this->_pagination_args['total_pages'] ) {
 815              $pagenum = $this->_pagination_args['total_pages'];
 816          }
 817  
 818          return max( 1, $pagenum );
 819      }
 820  
 821      /**
 822       * Gets the number of items to display on a single page.
 823       *
 824       * @since 3.1.0
 825       *
 826       * @param string $option
 827       * @param int    $default
 828       * @return int
 829       */
 830  	protected function get_items_per_page( $option, $default = 20 ) {
 831          $per_page = (int) get_user_option( $option );
 832          if ( empty( $per_page ) || $per_page < 1 ) {
 833              $per_page = $default;
 834          }
 835  
 836          /**
 837           * Filters the number of items to be displayed on each page of the list table.
 838           *
 839           * The dynamic hook name, `$option`, refers to the `per_page` option depending
 840           * on the type of list table in use. Possible filter names include:
 841           *
 842           *  - `edit_comments_per_page`
 843           *  - `sites_network_per_page`
 844           *  - `site_themes_network_per_page`
 845           *  - `themes_network_per_page'`
 846           *  - `users_network_per_page`
 847           *  - `edit_post_per_page`
 848           *  - `edit_page_per_page'`
 849           *  - `edit_{$post_type}_per_page`
 850           *  - `edit_post_tag_per_page`
 851           *  - `edit_category_per_page`
 852           *  - `edit_{$taxonomy}_per_page`
 853           *  - `site_users_network_per_page`
 854           *  - `users_per_page`
 855           *
 856           * @since 2.9.0
 857           *
 858           * @param int $per_page Number of items to be displayed. Default 20.
 859           */
 860          return (int) apply_filters( "{$option}", $per_page );
 861      }
 862  
 863      /**
 864       * Displays the pagination.
 865       *
 866       * @since 3.1.0
 867       *
 868       * @param string $which
 869       */
 870  	protected function pagination( $which ) {
 871          if ( empty( $this->_pagination_args ) ) {
 872              return;
 873          }
 874  
 875          $total_items     = $this->_pagination_args['total_items'];
 876          $total_pages     = $this->_pagination_args['total_pages'];
 877          $infinite_scroll = false;
 878          if ( isset( $this->_pagination_args['infinite_scroll'] ) ) {
 879              $infinite_scroll = $this->_pagination_args['infinite_scroll'];
 880          }
 881  
 882          if ( 'top' === $which && $total_pages > 1 ) {
 883              $this->screen->render_screen_reader_content( 'heading_pagination' );
 884          }
 885  
 886          $output = '<span class="displaying-num">' . sprintf(
 887              /* translators: %s: Number of items. */
 888              _n( '%s item', '%s items', $total_items ),
 889              number_format_i18n( $total_items )
 890          ) . '</span>';
 891  
 892          $current              = $this->get_pagenum();
 893          $removable_query_args = wp_removable_query_args();
 894  
 895          $current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
 896  
 897          $current_url = remove_query_arg( $removable_query_args, $current_url );
 898  
 899          $page_links = array();
 900  
 901          $total_pages_before = '<span class="paging-input">';
 902          $total_pages_after  = '</span></span>';
 903  
 904          $disable_first = false;
 905          $disable_last  = false;
 906          $disable_prev  = false;
 907          $disable_next  = false;
 908  
 909          if ( 1 == $current ) {
 910              $disable_first = true;
 911              $disable_prev  = true;
 912          }
 913          if ( $total_pages == $current ) {
 914              $disable_last = true;
 915              $disable_next = true;
 916          }
 917  
 918          if ( $disable_first ) {
 919              $page_links[] = '<span class="tablenav-pages-navspan button disabled" aria-hidden="true">&laquo;</span>';
 920          } else {
 921              $page_links[] = sprintf(
 922                  "<a class='first-page button' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
 923                  esc_url( remove_query_arg( 'paged', $current_url ) ),
 924                  __( 'First page' ),
 925                  '&laquo;'
 926              );
 927          }
 928  
 929          if ( $disable_prev ) {
 930              $page_links[] = '<span class="tablenav-pages-navspan button disabled" aria-hidden="true">&lsaquo;</span>';
 931          } else {
 932              $page_links[] = sprintf(
 933                  "<a class='prev-page button' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
 934                  esc_url( add_query_arg( 'paged', max( 1, $current - 1 ), $current_url ) ),
 935                  __( 'Previous page' ),
 936                  '&lsaquo;'
 937              );
 938          }
 939  
 940          if ( 'bottom' === $which ) {
 941              $html_current_page  = $current;
 942              $total_pages_before = '<span class="screen-reader-text">' . __( 'Current Page' ) . '</span><span id="table-paging" class="paging-input"><span class="tablenav-paging-text">';
 943          } else {
 944              $html_current_page = sprintf(
 945                  "%s<input class='current-page' id='current-page-selector' type='text' name='paged' value='%s' size='%d' aria-describedby='table-paging' /><span class='tablenav-paging-text'>",
 946                  '<label for="current-page-selector" class="screen-reader-text">' . __( 'Current Page' ) . '</label>',
 947                  $current,
 948                  strlen( $total_pages )
 949              );
 950          }
 951          $html_total_pages = sprintf( "<span class='total-pages'>%s</span>", number_format_i18n( $total_pages ) );
 952          $page_links[]     = $total_pages_before . sprintf(
 953              /* translators: 1: Current page, 2: Total pages. */
 954              _x( '%1$s of %2$s', 'paging' ),
 955              $html_current_page,
 956              $html_total_pages
 957          ) . $total_pages_after;
 958  
 959          if ( $disable_next ) {
 960              $page_links[] = '<span class="tablenav-pages-navspan button disabled" aria-hidden="true">&rsaquo;</span>';
 961          } else {
 962              $page_links[] = sprintf(
 963                  "<a class='next-page button' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
 964                  esc_url( add_query_arg( 'paged', min( $total_pages, $current + 1 ), $current_url ) ),
 965                  __( 'Next page' ),
 966                  '&rsaquo;'
 967              );
 968          }
 969  
 970          if ( $disable_last ) {
 971              $page_links[] = '<span class="tablenav-pages-navspan button disabled" aria-hidden="true">&raquo;</span>';
 972          } else {
 973              $page_links[] = sprintf(
 974                  "<a class='last-page button' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
 975                  esc_url( add_query_arg( 'paged', $total_pages, $current_url ) ),
 976                  __( 'Last page' ),
 977                  '&raquo;'
 978              );
 979          }
 980  
 981          $pagination_links_class = 'pagination-links';
 982          if ( ! empty( $infinite_scroll ) ) {
 983              $pagination_links_class .= ' hide-if-js';
 984          }
 985          $output .= "\n<span class='$pagination_links_class'>" . implode( "\n", $page_links ) . '</span>';
 986  
 987          if ( $total_pages ) {
 988              $page_class = $total_pages < 2 ? ' one-page' : '';
 989          } else {
 990              $page_class = ' no-pages';
 991          }
 992          $this->_pagination = "<div class='tablenav-pages{$page_class}'>$output</div>";
 993  
 994          echo $this->_pagination;
 995      }
 996  
 997      /**
 998       * Gets a list of columns.
 999       *
1000       * The format is:
1001       * - `'internal-name' => 'Title'`
1002       *
1003       * @since 3.1.0
1004       * @abstract
1005       *
1006       * @return array
1007       */
1008  	public function get_columns() {
1009          die( 'function WP_List_Table::get_columns() must be overridden in a subclass.' );
1010      }
1011  
1012      /**
1013       * Gets a list of sortable columns.
1014       *
1015       * The format is:
1016       * - `'internal-name' => 'orderby'`
1017       * - `'internal-name' => array( 'orderby', 'asc' )` - The second element sets the initial sorting order.
1018       * - `'internal-name' => array( 'orderby', true )`  - The second element makes the initial order descending.
1019       *
1020       * @since 3.1.0
1021       *
1022       * @return array
1023       */
1024  	protected function get_sortable_columns() {
1025          return array();
1026      }
1027  
1028      /**
1029       * Gets the name of the default primary column.
1030       *
1031       * @since 4.3.0
1032       *
1033       * @return string Name of the default primary column, in this case, an empty string.
1034       */
1035  	protected function get_default_primary_column_name() {
1036          $columns = $this->get_columns();
1037          $column  = '';
1038  
1039          if ( empty( $columns ) ) {
1040              return $column;
1041          }
1042  
1043          // We need a primary defined so responsive views show something,
1044          // so let's fall back to the first non-checkbox column.
1045          foreach ( $columns as $col => $column_name ) {
1046              if ( 'cb' === $col ) {
1047                  continue;
1048              }
1049  
1050              $column = $col;
1051              break;
1052          }
1053  
1054          return $column;
1055      }
1056  
1057      /**
1058       * Public wrapper for WP_List_Table::get_default_primary_column_name().
1059       *
1060       * @since 4.4.0
1061       *
1062       * @return string Name of the default primary column.
1063       */
1064  	public function get_primary_column() {
1065          return $this->get_primary_column_name();
1066      }
1067  
1068      /**
1069       * Gets the name of the primary column.
1070       *
1071       * @since 4.3.0
1072       *
1073       * @return string The name of the primary column.
1074       */
1075  	protected function get_primary_column_name() {
1076          $columns = get_column_headers( $this->screen );
1077          $default = $this->get_default_primary_column_name();
1078  
1079          // If the primary column doesn't exist,
1080          // fall back to the first non-checkbox column.
1081          if ( ! isset( $columns[ $default ] ) ) {
1082              $default = self::get_default_primary_column_name();
1083          }
1084  
1085          /**
1086           * Filters the name of the primary column for the current list table.
1087           *
1088           * @since 4.3.0
1089           *
1090           * @param string $default Column name default for the specific list table, e.g. 'name'.
1091           * @param string $context Screen ID for specific list table, e.g. 'plugins'.
1092           */
1093          $column = apply_filters( 'list_table_primary_column', $default, $this->screen->id );
1094  
1095          if ( empty( $column ) || ! isset( $columns[ $column ] ) ) {
1096              $column = $default;
1097          }
1098  
1099          return $column;
1100      }
1101  
1102      /**
1103       * Gets a list of all, hidden, and sortable columns, with filter applied.
1104       *
1105       * @since 3.1.0
1106       *
1107       * @return array
1108       */
1109  	protected function get_column_info() {
1110          // $_column_headers is already set / cached.
1111          if ( isset( $this->_column_headers ) && is_array( $this->_column_headers ) ) {
1112              /*
1113               * Backward compatibility for `$_column_headers` format prior to WordPress 4.3.
1114               *
1115               * In WordPress 4.3 the primary column name was added as a fourth item in the
1116               * column headers property. This ensures the primary column name is included
1117               * in plugins setting the property directly in the three item format.
1118               */
1119              $column_headers = array( array(), array(), array(), $this->get_primary_column_name() );
1120              foreach ( $this->_column_headers as $key => $value ) {
1121                  $column_headers[ $key ] = $value;
1122              }
1123  
1124              return $column_headers;
1125          }
1126  
1127          $columns = get_column_headers( $this->screen );
1128          $hidden  = get_hidden_columns( $this->screen );
1129  
1130          $sortable_columns = $this->get_sortable_columns();
1131          /**
1132           * Filters the list table sortable columns for a specific screen.
1133           *
1134           * The dynamic portion of the hook name, `$this->screen->id`, refers
1135           * to the ID of the current screen.
1136           *
1137           * @since 3.1.0
1138           *
1139           * @param array $sortable_columns An array of sortable columns.
1140           */
1141          $_sortable = apply_filters( "manage_{$this->screen->id}_sortable_columns", $sortable_columns );
1142  
1143          $sortable = array();
1144          foreach ( $_sortable as $id => $data ) {
1145              if ( empty( $data ) ) {
1146                  continue;
1147              }
1148  
1149              $data = (array) $data;
1150              if ( ! isset( $data[1] ) ) {
1151                  $data[1] = false;
1152              }
1153  
1154              $sortable[ $id ] = $data;
1155          }
1156  
1157          $primary               = $this->get_primary_column_name();
1158          $this->_column_headers = array( $columns, $hidden, $sortable, $primary );
1159  
1160          return $this->_column_headers;
1161      }
1162  
1163      /**
1164       * Returns the number of visible columns.
1165       *
1166       * @since 3.1.0
1167       *
1168       * @return int
1169       */
1170  	public function get_column_count() {
1171          list ( $columns, $hidden ) = $this->get_column_info();
1172          $hidden                    = array_intersect( array_keys( $columns ), array_filter( $hidden ) );
1173          return count( $columns ) - count( $hidden );
1174      }
1175  
1176      /**
1177       * Prints column headers, accounting for hidden and sortable columns.
1178       *
1179       * @since 3.1.0
1180       *
1181       * @param bool $with_id Whether to set the ID attribute or not
1182       */
1183  	public function print_column_headers( $with_id = true ) {
1184          list( $columns, $hidden, $sortable, $primary ) = $this->get_column_info();
1185  
1186          $current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
1187          $current_url = remove_query_arg( 'paged', $current_url );
1188  
1189          if ( isset( $_GET['orderby'] ) ) {
1190              $current_orderby = $_GET['orderby'];
1191          } else {
1192              $current_orderby = '';
1193          }
1194  
1195          if ( isset( $_GET['order'] ) && 'desc' === $_GET['order'] ) {
1196              $current_order = 'desc';
1197          } else {
1198              $current_order = 'asc';
1199          }
1200  
1201          if ( ! empty( $columns['cb'] ) ) {
1202              static $cb_counter = 1;
1203              $columns['cb']     = '<label class="screen-reader-text" for="cb-select-all-' . $cb_counter . '">' . __( 'Select All' ) . '</label>'
1204                  . '<input id="cb-select-all-' . $cb_counter . '" type="checkbox" />';
1205              $cb_counter++;
1206          }
1207  
1208          foreach ( $columns as $column_key => $column_display_name ) {
1209              $class = array( 'manage-column', "column-$column_key" );
1210  
1211              if ( in_array( $column_key, $hidden, true ) ) {
1212                  $class[] = 'hidden';
1213              }
1214  
1215              if ( 'cb' === $column_key ) {
1216                  $class[] = 'check-column';
1217              } elseif ( in_array( $column_key, array( 'posts', 'comments', 'links' ), true ) ) {
1218                  $class[] = 'num';
1219              }
1220  
1221              if ( $column_key === $primary ) {
1222                  $class[] = 'column-primary';
1223              }
1224  
1225              if ( isset( $sortable[ $column_key ] ) ) {
1226                  list( $orderby, $desc_first ) = $sortable[ $column_key ];
1227  
1228                  if ( $current_orderby === $orderby ) {
1229                      $order = 'asc' === $current_order ? 'desc' : 'asc';
1230  
1231                      $class[] = 'sorted';
1232                      $class[] = $current_order;
1233                  } else {
1234                      $order = strtolower( $desc_first );
1235  
1236                      if ( ! in_array( $order, array( 'desc', 'asc' ), true ) ) {
1237                          $order = $desc_first ? 'desc' : 'asc';
1238                      }
1239  
1240                      $class[] = 'sortable';
1241                      $class[] = 'desc' === $order ? 'asc' : 'desc';
1242                  }
1243  
1244                  $column_display_name = sprintf(
1245                      '<a href="%s"><span>%s</span><span class="sorting-indicator"></span></a>',
1246                      esc_url( add_query_arg( compact( 'orderby', 'order' ), $current_url ) ),
1247                      $column_display_name
1248                  );
1249              }
1250  
1251              $tag   = ( 'cb' === $column_key ) ? 'td' : 'th';
1252              $scope = ( 'th' === $tag ) ? 'scope="col"' : '';
1253              $id    = $with_id ? "id='$column_key'" : '';
1254  
1255              if ( ! empty( $class ) ) {
1256                  $class = "class='" . implode( ' ', $class ) . "'";
1257              }
1258  
1259              echo "<$tag $scope $id $class>$column_display_name</$tag>";
1260          }
1261      }
1262  
1263      /**
1264       * Displays the table.
1265       *
1266       * @since 3.1.0
1267       */
1268  	public function display() {
1269          $singular = $this->_args['singular'];
1270  
1271          $this->display_tablenav( 'top' );
1272  
1273          $this->screen->render_screen_reader_content( 'heading_list' );
1274          ?>
1275  <table class="wp-list-table <?php echo implode( ' ', $this->get_table_classes() ); ?>">
1276      <thead>
1277      <tr>
1278          <?php $this->print_column_headers(); ?>
1279      </tr>
1280      </thead>
1281  
1282      <tbody id="the-list"
1283          <?php
1284          if ( $singular ) {
1285              echo " data-wp-lists='list:$singular'";
1286          }
1287          ?>
1288          >
1289          <?php $this->display_rows_or_placeholder(); ?>
1290      </tbody>
1291  
1292      <tfoot>
1293      <tr>
1294          <?php $this->print_column_headers( false ); ?>
1295      </tr>
1296      </tfoot>
1297  
1298  </table>
1299          <?php
1300          $this->display_tablenav( 'bottom' );
1301      }
1302  
1303      /**
1304       * Gets a list of CSS classes for the WP_List_Table table tag.
1305       *
1306       * @since 3.1.0
1307       *
1308       * @return string[] Array of CSS classes for the table tag.
1309       */
1310  	protected function get_table_classes() {
1311          $mode = get_user_setting( 'posts_list_mode', 'list' );
1312  
1313          $mode_class = esc_attr( 'table-view-' . $mode );
1314  
1315          return array( 'widefat', 'fixed', 'striped', $mode_class, $this->_args['plural'] );
1316      }
1317  
1318      /**
1319       * Generates the table navigation above or below the table
1320       *
1321       * @since 3.1.0
1322       * @param string $which
1323       */
1324  	protected function display_tablenav( $which ) {
1325          if ( 'top' === $which ) {
1326              wp_nonce_field( 'bulk-' . $this->_args['plural'] );
1327          }
1328          ?>
1329      <div class="tablenav <?php echo esc_attr( $which ); ?>">
1330  
1331          <?php if ( $this->has_items() ) : ?>
1332          <div class="alignleft actions bulkactions">
1333              <?php $this->bulk_actions( $which ); ?>
1334          </div>
1335              <?php
1336          endif;
1337          $this->extra_tablenav( $which );
1338          $this->pagination( $which );
1339          ?>
1340  
1341          <br class="clear" />
1342      </div>
1343          <?php
1344      }
1345  
1346      /**
1347       * Extra controls to be displayed between bulk actions and pagination.
1348       *
1349       * @since 3.1.0
1350       *
1351       * @param string $which
1352       */
1353  	protected function extra_tablenav( $which ) {}
1354  
1355      /**
1356       * Generates the tbody element for the list table.
1357       *
1358       * @since 3.1.0
1359       */
1360  	public function display_rows_or_placeholder() {
1361          if ( $this->has_items() ) {
1362              $this->display_rows();
1363          } else {
1364              echo '<tr class="no-items"><td class="colspanchange" colspan="' . $this->get_column_count() . '">';
1365              $this->no_items();
1366              echo '</td></tr>';
1367          }
1368      }
1369  
1370      /**
1371       * Generates the table rows.
1372       *
1373       * @since 3.1.0
1374       */
1375  	public function display_rows() {
1376          foreach ( $this->items as $item ) {
1377              $this->single_row( $item );
1378          }
1379      }
1380  
1381      /**
1382       * Generates content for a single row of the table.
1383       *
1384       * @since 3.1.0
1385       *
1386       * @param object|array $item The current item
1387       */
1388  	public function single_row( $item ) {
1389          echo '<tr>';
1390          $this->single_row_columns( $item );
1391          echo '</tr>';
1392      }
1393  
1394      /**
1395       * @param object|array $item
1396       * @param string $column_name
1397       */
1398  	protected function column_default( $item, $column_name ) {}
1399  
1400      /**
1401       * @param object|array $item
1402       */
1403  	protected function column_cb( $item ) {}
1404  
1405      /**
1406       * Generates the columns for a single row of the table.
1407       *
1408       * @since 3.1.0
1409       *
1410       * @param object|array $item The current item.
1411       */
1412  	protected function single_row_columns( $item ) {
1413          list( $columns, $hidden, $sortable, $primary ) = $this->get_column_info();
1414  
1415          foreach ( $columns as $column_name => $column_display_name ) {
1416              $classes = "$column_name column-$column_name";
1417              if ( $primary === $column_name ) {
1418                  $classes .= ' has-row-actions column-primary';
1419              }
1420  
1421              if ( in_array( $column_name, $hidden, true ) ) {
1422                  $classes .= ' hidden';
1423              }
1424  
1425              // Comments column uses HTML in the display name with screen reader text.
1426              // Strip tags to get closer to a user-friendly string.
1427              $data = 'data-colname="' . esc_attr( wp_strip_all_tags( $column_display_name ) ) . '"';
1428  
1429              $attributes = "class='$classes' $data";
1430  
1431              if ( 'cb' === $column_name ) {
1432                  echo '<th scope="row" class="check-column">';
1433                  echo $this->column_cb( $item );
1434                  echo '</th>';
1435              } elseif ( method_exists( $this, '_column_' . $column_name ) ) {
1436                  echo call_user_func(
1437                      array( $this, '_column_' . $column_name ),
1438                      $item,
1439                      $classes,
1440                      $data,
1441                      $primary
1442                  );
1443              } elseif ( method_exists( $this, 'column_' . $column_name ) ) {
1444                  echo "<td $attributes>";
1445                  echo call_user_func( array( $this, 'column_' . $column_name ), $item );
1446                  echo $this->handle_row_actions( $item, $column_name, $primary );
1447                  echo '</td>';
1448              } else {
1449                  echo "<td $attributes>";
1450                  echo $this->column_default( $item, $column_name );
1451                  echo $this->handle_row_actions( $item, $column_name, $primary );
1452                  echo '</td>';
1453              }
1454          }
1455      }
1456  
1457      /**
1458       * Generates and display row actions links for the list table.
1459       *
1460       * @since 4.3.0
1461       *
1462       * @param object|array $item        The item being acted upon.
1463       * @param string       $column_name Current column name.
1464       * @param string       $primary     Primary column name.
1465       * @return string The row actions HTML, or an empty string
1466       *                if the current column is not the primary column.
1467       */
1468  	protected function handle_row_actions( $item, $column_name, $primary ) {
1469          return $column_name === $primary ? '<button type="button" class="toggle-row"><span class="screen-reader-text">' . __( 'Show more details' ) . '</span></button>' : '';
1470      }
1471  
1472      /**
1473       * Handles an incoming ajax request (called from admin-ajax.php)
1474       *
1475       * @since 3.1.0
1476       */
1477  	public function ajax_response() {
1478          $this->prepare_items();
1479  
1480          ob_start();
1481          if ( ! empty( $_REQUEST['no_placeholder'] ) ) {
1482              $this->display_rows();
1483          } else {
1484              $this->display_rows_or_placeholder();
1485          }
1486  
1487          $rows = ob_get_clean();
1488  
1489          $response = array( 'rows' => $rows );
1490  
1491          if ( isset( $this->_pagination_args['total_items'] ) ) {
1492              $response['total_items_i18n'] = sprintf(
1493                  /* translators: Number of items. */
1494                  _n( '%s item', '%s items', $this->_pagination_args['total_items'] ),
1495                  number_format_i18n( $this->_pagination_args['total_items'] )
1496              );
1497          }
1498          if ( isset( $this->_pagination_args['total_pages'] ) ) {
1499              $response['total_pages']      = $this->_pagination_args['total_pages'];
1500              $response['total_pages_i18n'] = number_format_i18n( $this->_pagination_args['total_pages'] );
1501          }
1502  
1503          die( wp_json_encode( $response ) );
1504      }
1505  
1506      /**
1507       * Sends required variables to JavaScript land.
1508       *
1509       * @since 3.1.0
1510       */
1511  	public function _js_vars() {
1512          $args = array(
1513              'class'  => get_class( $this ),
1514              'screen' => array(
1515                  'id'   => $this->screen->id,
1516                  'base' => $this->screen->base,
1517              ),
1518          );
1519  
1520          printf( "<script type='text/javascript'>list_args = %s;</script>\n", wp_json_encode( $args ) );
1521      }
1522  }


Generated: Thu Oct 21 01:00:03 2021 Cross-referenced by PHPXref 0.7.1