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<?php
/**
* Administration API: WP_List_Table class
*
* @package WordPress
* @subpackage List_Table
* @since 3.1.0
*/
/**
* Base class for displaying a list of items in an ajaxified HTML table.
*
* @since 3.1.0
* @access private
*/
class WP_List_Table {
/**
* The current list of items.
*
* @since 3.1.0
* @var array
*/
public $items;
/**
* Various information about the current table.
*
* @since 3.1.0
* @var array
*/
protected $_args;
/**
* Various information needed for displaying the pagination.
*
* @since 3.1.0
* @var array
*/
protected $_pagination_args = array();
/**
* The current screen.
*
* @since 3.1.0
* @var object
*/
protected $screen;
/**
* Cached bulk actions.
*
* @since 3.1.0
* @var array
*/
private $_actions;
/**
* Cached pagination output.
*
* @since 3.1.0
* @var string
*/
private $_pagination;
/**
* The view switcher modes.
*
* @since 4.1.0
* @var array
*/
protected $modes = array();
/**
* Stores the value returned by ->get_column_info().
*
* @since 4.1.0
* @var array
*/
protected $_column_headers;
/**
* {@internal Missing Summary}
*
* @var array
*/
protected $compat_fields = array( '_args', '_pagination_args', 'screen', '_actions', '_pagination' );
/**
* {@internal Missing Summary}
*
* @var array
*/
protected $compat_methods = array(
'set_pagination_args',
'get_views',
'get_bulk_actions',
'bulk_actions',
'row_actions',
'months_dropdown',
'view_switcher',
'comments_bubble',
'get_items_per_page',
'pagination',
'get_sortable_columns',
'get_column_info',
'get_table_classes',
'display_tablenav',
'extra_tablenav',
'single_row_columns',
);
/**
* Constructor.
*
* The child class should call this constructor from its own constructor to override
* the default $args.
*
* @since 3.1.0
*
* @param array|string $args {
* Array or string of arguments.
*
* @type string $plural Plural value used for labels and the objects being listed.
* This affects things such as CSS class-names and nonces used
* in the list table, e.g. 'posts'. Default empty.
* @type string $singular Singular label for an object being listed, e.g. 'post'.
* Default empty
* @type bool $ajax Whether the list table supports Ajax. This includes loading
* and sorting data, for example. If true, the class will call
* the _js_vars() method in the footer to provide variables
* to any scripts handling Ajax events. Default false.
* @type string $screen String containing the hook name used to determine the current
* screen. If left null, the current screen will be automatically set.
* Default null.
* }
*/
public function __construct( $args = array() ) {
$args = wp_parse_args(
$args,
array(
'plural' => '',
'singular' => '',
'ajax' => false,
'screen' => null,
)
);
$this->screen = convert_to_screen( $args['screen'] );
add_filter( "manage_{$this->screen->id}_columns", array( $this, 'get_columns' ), 0 );
if ( ! $args['plural'] ) {
$args['plural'] = $this->screen->base;
}
$args['plural'] = sanitize_key( $args['plural'] );
$args['singular'] = sanitize_key( $args['singular'] );
$this->_args = $args;
if ( $args['ajax'] ) {
// wp_enqueue_script( 'list-table' );
add_action( 'admin_footer', array( $this, '_js_vars' ) );
}
if ( empty( $this->modes ) ) {
$this->modes = array(
'list' => __( 'List View' ),
'excerpt' => __( 'Excerpt View' ),
);
}
}
/**
* Make private properties readable for backward compatibility.
*
* @since 4.0.0
*
* @param string $name Property to get.
* @return mixed Property.
*/
public function __get( $name ) {
if ( in_array( $name, $this->compat_fields ) ) {
return $this->$name;
}
}
/**
* Make private properties settable for backward compatibility.
*
* @since 4.0.0
*
* @param string $name Property to check if set.
* @param mixed $value Property value.
* @return mixed Newly-set property.
*/
public function __set( $name, $value ) {
if ( in_array( $name, $this->compat_fields ) ) {
return $this->$name = $value;
}
}
/**
* Make private properties checkable for backward compatibility.
*
* @since 4.0.0
*
* @param string $name Property to check if set.
* @return bool Whether the property is set.
*/
public function __isset( $name ) {
if ( in_array( $name, $this->compat_fields ) ) {
return isset( $this->$name );
}
}
/**
* Make private properties un-settable for backward compatibility.
*
* @since 4.0.0
*
* @param string $name Property to unset.
*/
public function __unset( $name ) {
if ( in_array( $name, $this->compat_fields ) ) {
unset( $this->$name );
}
}
/**
* Make private/protected methods readable for backward compatibility.
*
* @since 4.0.0
*
* @param string $name Method to call.
* @param array $arguments Arguments to pass when calling.
* @return mixed|bool Return value of the callback, false otherwise.
*/
public function __call( $name, $arguments ) {
if ( in_array( $name, $this->compat_methods ) ) {
return $this->$name( ...$arguments );
}
return false;
}
/**
* Checks the current user's permissions
*
* @since 3.1.0
* @abstract
*/
public function ajax_user_can() {
die( 'function WP_List_Table::ajax_user_can() must be over-ridden in a sub-class.' );
}
/**
* Prepares the list of items for displaying.
*
* @uses WP_List_Table::set_pagination_args()
*
* @since 3.1.0
* @abstract
*/
public function prepare_items() {
die( 'function WP_List_Table::prepare_items() must be over-ridden in a sub-class.' );
}
/**
* An internal method that sets all the necessary pagination arguments
*
* @since 3.1.0
*
* @param array|string $args Array or string of arguments with information about the pagination.
*/
protected function set_pagination_args( $args ) {
$args = wp_parse_args(
$args,
array(
'total_items' => 0,
'total_pages' => 0,
'per_page' => 0,
)
);
if ( ! $args['total_pages'] && $args['per_page'] > 0 ) {
$args['total_pages'] = ceil( $args['total_items'] / $args['per_page'] );
}
// Redirect if page number is invalid and headers are not already sent.
if ( ! headers_sent() && ! wp_doing_ajax() && $args['total_pages'] > 0 && $this->get_pagenum() > $args['total_pages'] ) {
wp_redirect( add_query_arg( 'paged', $args['total_pages'] ) );
exit;
}
$this->_pagination_args = $args;
}
/**
* Access the pagination args.
*
* @since 3.1.0
*
* @param string $key Pagination argument to retrieve. Common values include 'total_items',
* 'total_pages', 'per_page', or 'infinite_scroll'.
* @return int Number of items that correspond to the given pagination argument.
*/
public function get_pagination_arg( $key ) {
if ( 'page' === $key ) {
return $this->get_pagenum();
}
if ( isset( $this->_pagination_args[ $key ] ) ) {
return $this->_pagination_args[ $key ];
}
}
/**
* Whether the table has items to display or not
*
* @since 3.1.0
*
* @return bool
*/
public function has_items() {
return ! empty( $this->items );
}
/**
* Message to be displayed when there are no items
*
* @since 3.1.0
*/
public function no_items() {
_e( 'No items found.' );
}
/**
* Displays the search box.
*
* @since 3.1.0
*
* @param string $text The 'submit' button label.
* @param string $input_id ID attribute value for the search input field.
*/
public function search_box( $text, $input_id ) {
if ( empty( $_REQUEST['s'] ) && ! $this->has_items() ) {
return;
}
$input_id = $input_id . '-search-input';
if ( ! empty( $_REQUEST['orderby'] ) ) {
echo '<input type="hidden" name="orderby" value="' . esc_attr( $_REQUEST['orderby'] ) . '" />';
}
if ( ! empty( $_REQUEST['order'] ) ) {
echo '<input type="hidden" name="order" value="' . esc_attr( $_REQUEST['order'] ) . '" />';
}
if ( ! empty( $_REQUEST['post_mime_type'] ) ) {
echo '<input type="hidden" name="post_mime_type" value="' . esc_attr( $_REQUEST['post_mime_type'] ) . '" />';
}
if ( ! empty( $_REQUEST['detached'] ) ) {
echo '<input type="hidden" name="detached" value="' . esc_attr( $_REQUEST['detached'] ) . '" />';
}
?>
<p class="search-box">
<label class="screen-reader-text" for="<?php echo esc_attr( $input_id ); ?>"><?php echo $text; ?>:</label>
<input type="search" id="<?php echo esc_attr( $input_id ); ?>" name="s" value="<?php _admin_search_query(); ?>" />
<?php submit_button( $text, '', '', false, array( 'id' => 'search-submit' ) ); ?>
</p>
<?php
}
/**
* Get an associative array ( id => link ) with the list
* of views available on this table.
*
* @since 3.1.0
*
* @return array
*/
protected function get_views() {
return array();
}
/**
* Display the list of views available on this table.
*
* @since 3.1.0
*/
public function views() {
$views = $this->get_views();
/**
* Filters the list of available list table views.
*
* The dynamic portion of the hook name, `$this->screen->id`, refers
* to the ID of the current screen, usually a string.
*
* @since 3.5.0
*
* @param string[] $views An array of available list table views.
*/
$views = apply_filters( "views_{$this->screen->id}", $views );
if ( empty( $views ) ) {
return;
}
$this->screen->render_screen_reader_content( 'heading_views' );
echo "<ul class='subsubsub'>\n";
foreach ( $views as $class => $view ) {
$views[ $class ] = "\t<li class='$class'>$view";
}
echo implode( " |</li>\n", $views ) . "</li>\n";
echo '</ul>';
}
/**
* Get an associative array ( option_name => option_title ) with the list
* of bulk actions available on this table.
*
* @since 3.1.0
*
* @return array
*/
protected function get_bulk_actions() {
return array();
}
/**
* Display the bulk actions dropdown.
*
* @since 3.1.0
*
* @param string $which The location of the bulk actions: 'top' or 'bottom'.
* This is designated as optional for backward compatibility.
*/
protected function bulk_actions( $which = '' ) {
if ( is_null( $this->_actions ) ) {
$this->_actions = $this->get_bulk_actions();
/**
* Filters the list table Bulk Actions drop-down.
*
* The dynamic portion of the hook name, `$this->screen->id`, refers
* to the ID of the current screen, usually a string.
*
* This filter can currently only be used to remove bulk actions.
*
* @since 3.5.0
*
* @param string[] $actions An array of the available bulk actions.
*/
$this->_actions = apply_filters( "bulk_actions-{$this->screen->id}", $this->_actions ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
$two = '';
} else {
$two = '2';
}
if ( empty( $this->_actions ) ) {
return;
}
echo '<label for="bulk-action-selector-' . esc_attr( $which ) . '" class="screen-reader-text">' . __( 'Select bulk action' ) . '</label>';
echo '<select name="action' . $two . '" id="bulk-action-selector-' . esc_attr( $which ) . "\">\n";
echo '<option value="-1">' . __( 'Bulk Actions' ) . "</option>\n";
foreach ( $this->_actions as $name => $title ) {
$class = 'edit' === $name ? ' class="hide-if-no-js"' : '';
echo "\t" . '<option value="' . $name . '"' . $class . '>' . $title . "</option>\n";
}
echo "</select>\n";
submit_button( __( 'Apply' ), 'action', '', false, array( 'id' => "doaction$two" ) );
echo "\n";
}
/**
* Get the current action selected from the bulk actions dropdown.
*
* @since 3.1.0
*
* @return string|false The action name or False if no action was selected
*/
public function current_action() {
if ( isset( $_REQUEST['filter_action'] ) && ! empty( $_REQUEST['filter_action'] ) ) {
return false;
}
if ( isset( $_REQUEST['action'] ) && -1 != $_REQUEST['action'] ) {
return $_REQUEST['action'];
}
if ( isset( $_REQUEST['action2'] ) && -1 != $_REQUEST['action2'] ) {
return $_REQUEST['action2'];
}
return false;
}
/**
* Generate row actions div
*
* @since 3.1.0
*
* @param string[] $actions An array of action links.
* @param bool $always_visible Whether the actions should be always visible.
* @return string
*/
protected function row_actions( $actions, $always_visible = false ) {
$action_count = count( $actions );
$i = 0;
if ( ! $action_count ) {
return '';
}
$out = '<div class="' . ( $always_visible ? 'row-actions visible' : 'row-actions' ) . '">';
foreach ( $actions as $action => $link ) {
++$i;
( $i == $action_count ) ? $sep = '' : $sep = ' | ';
$out .= "<span class='$action'>$link$sep</span>";
}
$out .= '</div>';
$out .= '<button type="button" class="toggle-row"><span class="screen-reader-text">' . __( 'Show more details' ) . '</span></button>';
return $out;
}
/**
* Display a monthly dropdown for filtering items
*
* @since 3.1.0
*
* @global wpdb $wpdb WordPress database abstraction object.
* @global WP_Locale $wp_locale WordPress date and time locale object.
*
* @param string $post_type
*/
protected function months_dropdown( $post_type ) {
global $wpdb, $wp_locale;
/**
* Filters whether to remove the 'Months' drop-down from the post list table.
*
* @since 4.2.0
*
* @param bool $disable Whether to disable the drop-down. Default false.
* @param string $post_type The post type.
*/
if ( apply_filters( 'disable_months_dropdown', false, $post_type ) ) {
return;
}
$extra_checks = "AND post_status != 'auto-draft'";
if ( ! isset( $_GET['post_status'] ) || 'trash' !== $_GET['post_status'] ) {
$extra_checks .= " AND post_status != 'trash'";
} elseif ( isset( $_GET['post_status'] ) ) {
$extra_checks = $wpdb->prepare( ' AND post_status = %s', $_GET['post_status'] );
}
$months = $wpdb->get_results(
$wpdb->prepare(
"
SELECT DISTINCT YEAR( post_date ) AS year, MONTH( post_date ) AS month
FROM $wpdb->posts
WHERE post_type = %s
$extra_checks
ORDER BY post_date DESC
",
$post_type
)
);
/**
* Filters the 'Months' drop-down results.
*
* @since 3.7.0
*
* @param object $months The months drop-down query results.
* @param string $post_type The post type.
*/
$months = apply_filters( 'months_dropdown_results', $months, $post_type );
$month_count = count( $months );
if ( ! $month_count || ( 1 == $month_count && 0 == $months[0]->month ) ) {
return;
}
$m = isset( $_GET['m'] ) ? (int) $_GET['m'] : 0;
?>
<label for="filter-by-date" class="screen-reader-text"><?php _e( 'Filter by date' ); ?></label>
<select name="m" id="filter-by-date">
<option<?php selected( $m, 0 ); ?> value="0"><?php _e( 'All dates' ); ?></option>
<?php
foreach ( $months as $arc_row ) {
if ( 0 == $arc_row->year ) {
continue;
}
$month = zeroise( $arc_row->month, 2 );
$year = $arc_row->year;
printf(
"<option %s value='%s'>%s</option>\n",
selected( $m, $year . $month, false ),
esc_attr( $arc_row->year . $month ),
/* translators: 1: Month name, 2: 4-digit year. */
sprintf( __( '%1$s %2$d' ), $wp_locale->get_month( $month ), $year )
);
}
?>
</select>
<?php
}
/**
* Display a view switcher
*
* @since 3.1.0
*
* @param string $current_mode
*/
protected function view_switcher( $current_mode ) {
?>
<input type="hidden" name="mode" value="<?php echo esc_attr( $current_mode ); ?>" />
<div class="view-switch">
<?php
foreach ( $this->modes as $mode => $title ) {
$classes = array( 'view-' . $mode );
$aria_current = '';
if ( $current_mode === $mode ) {
$classes[] = 'current';
$aria_current = ' aria-current="page"';
}
printf(
"<a href='%s' class='%s' id='view-switch-$mode'$aria_current><span class='screen-reader-text'>%s</span></a>\n",
esc_url( add_query_arg( 'mode', $mode ) ),
implode( ' ', $classes ),
$title
);
}
?>
</div>
<?php
}
/**
* Display a comment count bubble
*
* @since 3.1.0
*
* @param int $post_id The post ID.
* @param int $pending_comments Number of pending comments.
*/
protected function comments_bubble( $post_id, $pending_comments ) {
$approved_comments = get_comments_number();
$approved_comments_number = number_format_i18n( $approved_comments );
$pending_comments_number = number_format_i18n( $pending_comments );
$approved_only_phrase = sprintf(
/* translators: %s: Number of comments. */
_n( '%s comment', '%s comments', $approved_comments ),
$approved_comments_number
);
$approved_phrase = sprintf(
/* translators: %s: Number of comments. */
_n( '%s approved comment', '%s approved comments', $approved_comments ),
$approved_comments_number
);
$pending_phrase = sprintf(
/* translators: %s: Number of comments. */
_n( '%s pending comment', '%s pending comments', $pending_comments ),
$pending_comments_number
);
$post_object = get_post( $post_id );
$edit_post_cap = $post_object ? 'edit_post' : 'edit_posts';
if (
current_user_can( $edit_post_cap, $post_id ) ||
(
empty( $post_object->post_password ) &&
current_user_can( 'read_post', $post_id )
)
) {
// The user has access to the post and thus can see comments
} else {
return false;
}
if ( ! $approved_comments && ! $pending_comments ) {
printf(
'<span aria-hidden="true">—</span><span class="screen-reader-text">%s</span>',
__( 'No comments' )
);
// Approved comments have different display depending on some conditions.
} elseif ( $approved_comments ) {
printf(
'<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>',
esc_url(
add_query_arg(
array(
'p' => $post_id,
'comment_status' => 'approved',
),
admin_url( 'edit-comments.php' )
)
),
$approved_comments_number,
$pending_comments ? $approved_phrase : $approved_only_phrase
);
} else {
printf(
'<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>',
$approved_comments_number,
$pending_comments ? __( 'No approved comments' ) : __( 'No comments' )
);
}
if ( $pending_comments ) {
printf(
'<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>',
esc_url(
add_query_arg(
array(
'p' => $post_id,
'comment_status' => 'moderated',
),
admin_url( 'edit-comments.php' )
)
),
$pending_comments_number,
$pending_phrase
);
} else {
printf(
'<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>',
$pending_comments_number,
$approved_comments ? __( 'No pending comments' ) : __( 'No comments' )
);
}
}
/**
* Get the current page number
*
* @since 3.1.0
*
* @return int
*/
public function get_pagenum() {
$pagenum = isset( $_REQUEST['paged'] ) ? absint( $_REQUEST['paged'] ) : 0;
if ( isset( $this->_pagination_args['total_pages'] ) && $pagenum > $this->_pagination_args['total_pages'] ) {
$pagenum = $this->_pagination_args['total_pages'];
}
return max( 1, $pagenum );
}
/**
* Get number of items to display on a single page
*
* @since 3.1.0
*
* @param string $option
* @param int $default
* @return int
*/
protected function get_items_per_page( $option, $default = 20 ) {
$per_page = (int) get_user_option( $option );
if ( empty( $per_page ) || $per_page < 1 ) {
$per_page = $default;
}
/**
* Filters the number of items to be displayed on each page of the list table.
*
* The dynamic hook name, $option, refers to the `per_page` option depending
* on the type of list table in use. Possible values include: 'edit_comments_per_page',
* 'sites_network_per_page', 'site_themes_network_per_page', 'themes_network_per_page',
* 'users_network_per_page', 'edit_post_per_page', 'edit_page_per_page',
* 'edit_{$post_type}_per_page', etc.
*
* @since 2.9.0
*
* @param int $per_page Number of items to be displayed. Default 20.
*/
return (int) apply_filters( "{$option}", $per_page );
}
/**
* Display the pagination.
*
* @since 3.1.0
*
* @param string $which
*/
protected function pagination( $which ) {
if ( empty( $this->_pagination_args ) ) {
return;
}
$total_items = $this->_pagination_args['total_items'];
$total_pages = $this->_pagination_args['total_pages'];
$infinite_scroll = false;
if ( isset( $this->_pagination_args['infinite_scroll'] ) ) {
$infinite_scroll = $this->_pagination_args['infinite_scroll'];
}
if ( 'top' === $which && $total_pages > 1 ) {
$this->screen->render_screen_reader_content( 'heading_pagination' );
}
$output = '<span class="displaying-num">' . sprintf(
/* translators: %s: Number of items. */
_n( '%s item', '%s items', $total_items ),
number_format_i18n( $total_items )
) . '</span>';
$current = $this->get_pagenum();
$removable_query_args = wp_removable_query_args();
$current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
$current_url = remove_query_arg( $removable_query_args, $current_url );
$page_links = array();
$total_pages_before = '<span class="paging-input">';
$total_pages_after = '</span></span>';
$disable_first = false;
$disable_last = false;
$disable_prev = false;
$disable_next = false;
if ( $current == 1 ) {
$disable_first = true;
$disable_prev = true;
}
if ( $current == 2 ) {
$disable_first = true;
}
if ( $current == $total_pages ) {
$disable_last = true;
$disable_next = true;
}
if ( $current == $total_pages - 1 ) {
$disable_last = true;
}
if ( $disable_first ) {
$page_links[] = '<span class="tablenav-pages-navspan button disabled" aria-hidden="true">«</span>';
} else {
$page_links[] = sprintf(
"<a class='first-page button' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
esc_url( remove_query_arg( 'paged', $current_url ) ),
__( 'First page' ),
'«'
);
}
if ( $disable_prev ) {
$page_links[] = '<span class="tablenav-pages-navspan button disabled" aria-hidden="true">‹</span>';
} else {
$page_links[] = sprintf(
"<a class='prev-page button' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
esc_url( add_query_arg( 'paged', max( 1, $current - 1 ), $current_url ) ),
__( 'Previous page' ),
'‹'
);
}
if ( 'bottom' === $which ) {
$html_current_page = $current;
$total_pages_before = '<span class="screen-reader-text">' . __( 'Current Page' ) . '</span><span id="table-paging" class="paging-input"><span class="tablenav-paging-text">';
} else {
$html_current_page = sprintf(
"%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'>",
'<label for="current-page-selector" class="screen-reader-text">' . __( 'Current Page' ) . '</label>',
$current,
strlen( $total_pages )
);
}
$html_total_pages = sprintf( "<span class='total-pages'>%s</span>", number_format_i18n( $total_pages ) );
$page_links[] = $total_pages_before . sprintf(
/* translators: 1: Current page, 2: Total pages. */
_x( '%1$s of %2$s', 'paging' ),
$html_current_page,
$html_total_pages
) . $total_pages_after;
if ( $disable_next ) {
$page_links[] = '<span class="tablenav-pages-navspan button disabled" aria-hidden="true">›</span>';
} else {
$page_links[] = sprintf(
"<a class='next-page button' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
esc_url( add_query_arg( 'paged', min( $total_pages, $current + 1 ), $current_url ) ),
__( 'Next page' ),
'›'
);
}
if ( $disable_last ) {
$page_links[] = '<span class="tablenav-pages-navspan button disabled" aria-hidden="true">»</span>';
} else {
$page_links[] = sprintf(
"<a class='last-page button' href='%s'><span class='screen-reader-text'>%s</span><span aria-hidden='true'>%s</span></a>",
esc_url( add_query_arg( 'paged', $total_pages, $current_url ) ),
__( 'Last page' ),
'»'
);
}
$pagination_links_class = 'pagination-links';
if ( ! empty( $infinite_scroll ) ) {
$pagination_links_class .= ' hide-if-js';
}
$output .= "\n<span class='$pagination_links_class'>" . join( "\n", $page_links ) . '</span>';
if ( $total_pages ) {
$page_class = $total_pages < 2 ? ' one-page' : '';
} else {
$page_class = ' no-pages';
}
$this->_pagination = "<div class='tablenav-pages{$page_class}'>$output</div>";
echo $this->_pagination;
}
/**
* Get a list of columns. The format is:
* 'internal-name' => 'Title'
*
* @since 3.1.0
* @abstract
*
* @return array
*/
public function get_columns() {
die( 'function WP_List_Table::get_columns() must be over-ridden in a sub-class.' );
}
/**
* Get a list of sortable columns. The format is:
* 'internal-name' => 'orderby'
* or
* 'internal-name' => array( 'orderby', true )
*
* The second format will make the initial sorting order be descending
*
* @since 3.1.0
*
* @return array
*/
protected function get_sortable_columns() {
return array();
}
/**
* Gets the name of the default primary column.
*
* @since 4.3.0
*
* @return string Name of the default primary column, in this case, an empty string.
*/
protected function get_default_primary_column_name() {
$columns = $this->get_columns();
$column = '';
if ( empty( $columns ) ) {
return $column;
}
// We need a primary defined so responsive views show something,
// so let's fall back to the first non-checkbox column.
foreach ( $columns as $col => $column_name ) {
if ( 'cb' === $col ) {
continue;
}
$column = $col;
break;
}
return $column;
}
/**
* Public wrapper for WP_List_Table::get_default_primary_column_name().
*
* @since 4.4.0
*
* @return string Name of the default primary column.
*/
public function get_primary_column() {
return $this->get_primary_column_name();
}
/**
* Gets the name of the primary column.
*
* @since 4.3.0
*
* @return string The name of the primary column.
*/
protected function get_primary_column_name() {
$columns = get_column_headers( $this->screen );
$default = $this->get_default_primary_column_name();
// If the primary column doesn't exist fall back to the
// first non-checkbox column.
if ( ! isset( $columns[ $default ] ) ) {
$default = WP_List_Table::get_default_primary_column_name();
}
/**
* Filters the name of the primary column for the current list table.
*
* @since 4.3.0
*
* @param string $default Column name default for the specific list table, e.g. 'name'.
* @param string $context Screen ID for specific list table, e.g. 'plugins'.
*/
$column = apply_filters( 'list_table_primary_column', $default, $this->screen->id );
if ( empty( $column ) || ! isset( $columns[ $column ] ) ) {
$column = $default;
}
return $column;
}
/**
* Get a list of all, hidden and sortable columns, with filter applied
*
* @since 3.1.0
*
* @return array
*/
protected function get_column_info() {
// $_column_headers is already set / cached
if ( isset( $this->_column_headers ) && is_array( $this->_column_headers ) ) {
// Back-compat for list tables that have been manually setting $_column_headers for horse reasons.
// In 4.3, we added a fourth argument for primary column.
$column_headers = array( array(), array(), array(), $this->get_primary_column_name() );
foreach ( $this->_column_headers as $key => $value ) {
$column_headers[ $key ] = $value;
}
return $column_headers;
}
$columns = get_column_headers( $this->screen );
$hidden = get_hidden_columns( $this->screen );
$sortable_columns = $this->get_sortable_columns();
/**
* Filters the list table sortable columns for a specific screen.
*
* The dynamic portion of the hook name, `$this->screen->id`, refers
* to the ID of the current screen, usually a string.
*
* @since 3.5.0
*
* @param array $sortable_columns An array of sortable columns.
*/
$_sortable = apply_filters( "manage_{$this->screen->id}_sortable_columns", $sortable_columns );
$sortable = array();
foreach ( $_sortable as $id => $data ) {
if ( empty( $data ) ) {
continue;
}
$data = (array) $data;
if ( ! isset( $data[1] ) ) {
$data[1] = false;
}
$sortable[ $id ] = $data;
}
$primary = $this->get_primary_column_name();
$this->_column_headers = array( $columns, $hidden, $sortable, $primary );
return $this->_column_headers;
}
/**
* Return number of visible columns
*
* @since 3.1.0
*
* @return int
*/
public function get_column_count() {
list ( $columns, $hidden ) = $this->get_column_info();
$hidden = array_intersect( array_keys( $columns ), array_filter( $hidden ) );
return count( $columns ) - count( $hidden );
}
/**
* Print column headers, accounting for hidden and sortable columns.
*
* @since 3.1.0
*
* @staticvar int $cb_counter
*
* @param bool $with_id Whether to set the id attribute or not
*/
public function print_column_headers( $with_id = true ) {
list( $columns, $hidden, $sortable, $primary ) = $this->get_column_info();
$current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
$current_url = remove_query_arg( 'paged', $current_url );
if ( isset( $_GET['orderby'] ) ) {
$current_orderby = $_GET['orderby'];
} else {
$current_orderby = '';
}
if ( isset( $_GET['order'] ) && 'desc' === $_GET['order'] ) {
$current_order = 'desc';
} else {
$current_order = 'asc';
}
if ( ! empty( $columns['cb'] ) ) {
static $cb_counter = 1;
$columns['cb'] = '<label class="screen-reader-text" for="cb-select-all-' . $cb_counter . '">' . __( 'Select All' ) . '</label>'
. '<input id="cb-select-all-' . $cb_counter . '" type="checkbox" />';
$cb_counter++;
}
foreach ( $columns as $column_key => $column_display_name ) {
$class = array( 'manage-column', "column-$column_key" );
if ( in_array( $column_key, $hidden ) ) {
$class[] = 'hidden';
}
if ( 'cb' === $column_key ) {
$class[] = 'check-column';
} elseif ( in_array( $column_key, array( 'posts', 'comments', 'links' ) ) ) {
$class[] = 'num';
}
if ( $column_key === $primary ) {
$class[] = 'column-primary';
}
if ( isset( $sortable[ $column_key ] ) ) {
list( $orderby, $desc_first ) = $sortable[ $column_key ];
if ( $current_orderby === $orderby ) {
$order = 'asc' === $current_order ? 'desc' : 'asc';
$class[] = 'sorted';
$class[] = $current_order;
} else {
$order = $desc_first ? 'desc' : 'asc';
$class[] = 'sortable';
$class[] = $desc_first ? 'asc' : 'desc';
}
$column_display_name = '<a href="' . esc_url( add_query_arg( compact( 'orderby', 'order' ), $current_url ) ) . '"><span>' . $column_display_name . '</span><span class="sorting-indicator"></span></a>';
}
$tag = ( 'cb' === $column_key ) ? 'td' : 'th';
$scope = ( 'th' === $tag ) ? 'scope="col"' : '';
$id = $with_id ? "id='$column_key'" : '';
if ( ! empty( $class ) ) {
$class = "class='" . join( ' ', $class ) . "'";
}
echo "<$tag $scope $id $class>$column_display_name</$tag>";
}
}
/**
* Displays the table.
*
* @since 3.1.0
*/
public function display() {
$singular = $this->_args['singular'];
$this->display_tablenav( 'top' );
$this->screen->render_screen_reader_content( 'heading_list' );
?>
<table class="wp-list-table <?php echo implode( ' ', $this->get_table_classes() ); ?>">
<thead>
<tr>
<?php $this->print_column_headers(); ?>
</tr>
</thead>
<tbody id="the-list"
<?php
if ( $singular ) {
echo " data-wp-lists='list:$singular'";
}
?>
>
<?php $this->display_rows_or_placeholder(); ?>
</tbody>
<tfoot>
<tr>
<?php $this->print_column_headers( false ); ?>
</tr>
</tfoot>
</table>
<?php
$this->display_tablenav( 'bottom' );
}
/**
* Get a list of CSS classes for the WP_List_Table table tag.
*
* @since 3.1.0
*
* @return array List of CSS classes for the table tag.
*/
protected function get_table_classes() {
return array( 'widefat', 'fixed', 'striped', $this->_args['plural'] );
}
/**
* Generate the table navigation above or below the table
*
* @since 3.1.0
* @param string $which
*/
protected function display_tablenav( $which ) {
if ( 'top' === $which ) {
wp_nonce_field( 'bulk-' . $this->_args['plural'] );
}
?>
<div class="tablenav <?php echo esc_attr( $which ); ?>">
<?php if ( $this->has_items() ) : ?>
<div class="alignleft actions bulkactions">
<?php $this->bulk_actions( $which ); ?>
</div>
<?php
endif;
$this->extra_tablenav( $which );
$this->pagination( $which );
?>
<br class="clear" />
</div>
<?php
}
/**
* Extra controls to be displayed between bulk actions and pagination
*
* @since 3.1.0
*
* @param string $which
*/
protected function extra_tablenav( $which ) {}
/**
* Generate the tbody element for the list table.
*
* @since 3.1.0
*/
public function display_rows_or_placeholder() {
if ( $this->has_items() ) {
$this->display_rows();
} else {
echo '<tr class="no-items"><td class="colspanchange" colspan="' . $this->get_column_count() . '">';
$this->no_items();
echo '</td></tr>';
}
}
/**
* Generate the table rows
*
* @since 3.1.0
*/
public function display_rows() {
foreach ( $this->items as $item ) {
$this->single_row( $item );
}
}
/**
* Generates content for a single row of the table
*
* @since 3.1.0
*
* @param object $item The current item
*/
public function single_row( $item ) {
echo '<tr>';
$this->single_row_columns( $item );
echo '</tr>';
}
/**
* @param object $item
* @param string $column_name
*/
protected function column_default( $item, $column_name ) {}
/**
* @param object $item
*/
protected function column_cb( $item ) {}
/**
* Generates the columns for a single row of the table
*
* @since 3.1.0
*
* @param object $item The current item
*/
protected function single_row_columns( $item ) {
list( $columns, $hidden, $sortable, $primary ) = $this->get_column_info();
foreach ( $columns as $column_name => $column_display_name ) {
$classes = "$column_name column-$column_name";
if ( $primary === $column_name ) {
$classes .= ' has-row-actions column-primary';
}
if ( in_array( $column_name, $hidden ) ) {
$classes .= ' hidden';
}
// Comments column uses HTML in the display name with screen reader text.
// Instead of using esc_attr(), we strip tags to get closer to a user-friendly string.
$data = 'data-colname="' . wp_strip_all_tags( $column_display_name ) . '"';
$attributes = "class='$classes' $data";
if ( 'cb' === $column_name ) {
echo '<th scope="row" class="check-column">';
echo $this->column_cb( $item );
echo '</th>';
} elseif ( method_exists( $this, '_column_' . $column_name ) ) {
echo call_user_func(
array( $this, '_column_' . $column_name ),
$item,
$classes,
$data,
$primary
);
} elseif ( method_exists( $this, 'column_' . $column_name ) ) {
echo "<td $attributes>";
echo call_user_func( array( $this, 'column_' . $column_name ), $item );
echo $this->handle_row_actions( $item, $column_name, $primary );
echo '</td>';
} else {
echo "<td $attributes>";
echo $this->column_default( $item, $column_name );
echo $this->handle_row_actions( $item, $column_name, $primary );
echo '</td>';
}
}
}
/**
* Generates and display row actions links for the list table.
*
* @since 4.3.0
*
* @param object $item The item being acted upon.
* @param string $column_name Current column name.
* @param string $primary Primary column name.
* @return string The row actions HTML, or an empty string if the current column is the primary column.
*/
protected function handle_row_actions( $item, $column_name, $primary ) {
return $column_name === $primary ? '<button type="button" class="toggle-row"><span class="screen-reader-text">' . __( 'Show more details' ) . '</span></button>' : '';
}
/**
* Handle an incoming ajax request (called from admin-ajax.php)
*
* @since 3.1.0
*/
public function ajax_response() {
$this->prepare_items();
ob_start();
if ( ! empty( $_REQUEST['no_placeholder'] ) ) {
$this->display_rows();
} else {
$this->display_rows_or_placeholder();
}
$rows = ob_get_clean();
$response = array( 'rows' => $rows );
if ( isset( $this->_pagination_args['total_items'] ) ) {
$response['total_items_i18n'] = sprintf(
/* translators: Number of items. */
_n( '%s item', '%s items', $this->_pagination_args['total_items'] ),
number_format_i18n( $this->_pagination_args['total_items'] )
);
}
if ( isset( $this->_pagination_args['total_pages'] ) ) {
$response['total_pages'] = $this->_pagination_args['total_pages'];
$response['total_pages_i18n'] = number_format_i18n( $this->_pagination_args['total_pages'] );
}
die( wp_json_encode( $response ) );
}
/**
* Send required variables to JavaScript land
*/
public function _js_vars() {
$args = array(
'class' => get_class( $this ),
'screen' => array(
'id' => $this->screen->id,
'base' => $this->screen->base,
),
);
printf( "<script type='text/javascript'>list_args = %s;</script>\n", wp_json_encode( $args ) );
}
}