wp/wp-admin/includes/screen.php
changeset 7 cf61fcea0001
parent 5 5e2f62d02dcd
child 9 177826044cd9
--- a/wp/wp-admin/includes/screen.php	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-admin/includes/screen.php	Mon Oct 14 17:39:30 2019 +0200
@@ -11,6 +11,8 @@
  *
  * @since 2.7.0
  *
+ * @staticvar array $column_headers
+ *
  * @param string|WP_Screen $screen The screen you want the headers for
  * @return array Containing the headers in the format id => UI String
  */
@@ -23,7 +25,7 @@
 	if ( ! isset( $column_headers[ $screen->id ] ) ) {
 
 		/**
-		 * Filter the column headers for a list table on a specific screen.
+		 * Filters the column headers for a list table on a specific screen.
 		 *
 		 * The dynamic portion of the hook name, `$screen->id`, refers to the
 		 * ID of a specific screen. For example, the screen ID for the Posts
@@ -49,10 +51,39 @@
  * @return array
  */
 function get_hidden_columns( $screen ) {
-	if ( is_string( $screen ) )
+	if ( is_string( $screen ) ) {
 		$screen = convert_to_screen( $screen );
+	}
 
-	return (array) get_user_option( 'manage' . $screen->id . 'columnshidden' );
+	$hidden = get_user_option( 'manage' . $screen->id . 'columnshidden' );
+
+	$use_defaults = ! is_array( $hidden );
+
+	if ( $use_defaults ) {
+		$hidden = array();
+
+		/**
+		 * Filters the default list of hidden columns.
+		 *
+		 * @since 4.4.0
+		 *
+		 * @param array     $hidden An array of columns hidden by default.
+		 * @param WP_Screen $screen WP_Screen object of the current screen.
+		 */
+		$hidden = apply_filters( 'default_hidden_columns', $hidden, $screen );
+	}
+
+	/**
+	 * Filters the list of hidden columns.
+	 *
+	 * @since 4.4.0
+	 * @since 4.4.1 Added the `use_defaults` parameter.
+	 *
+	 * @param array     $hidden An array of hidden columns.
+	 * @param WP_Screen $screen WP_Screen object of the current screen.
+	 * @param bool      $use_defaults Whether to show the default columns.
+	 */
+	return apply_filters( 'hidden_columns', $hidden, $screen, $use_defaults );
 }
 
 /**
@@ -60,6 +91,8 @@
  *
  * @since 2.7.0
  *
+ * @global array $wp_meta_boxes
+ *
  * @param WP_Screen $screen
  */
 function meta_box_prefs( $screen ) {
@@ -73,18 +106,30 @@
 
 	$hidden = get_hidden_meta_boxes($screen);
 
-	foreach ( array_keys($wp_meta_boxes[$screen->id]) as $context ) {
-		foreach ( array_keys($wp_meta_boxes[$screen->id][$context]) as $priority ) {
-			foreach ( $wp_meta_boxes[$screen->id][$context][$priority] as $box ) {
+	foreach ( array_keys( $wp_meta_boxes[ $screen->id ] ) as $context ) {
+		foreach ( array( 'high', 'core', 'default', 'low' ) as $priority ) {
+			if ( ! isset( $wp_meta_boxes[ $screen->id ][ $context ][ $priority ] ) ) {
+				continue;
+			}
+			foreach ( $wp_meta_boxes[ $screen->id ][ $context ][ $priority ] as $box ) {
 				if ( false == $box || ! $box['title'] )
 					continue;
 				// Submit box cannot be hidden
 				if ( 'submitdiv' == $box['id'] || 'linksubmitdiv' == $box['id'] )
 					continue;
-				$box_id = $box['id'];
-				echo '<label for="' . $box_id . '-hide">';
-				echo '<input class="hide-postbox-tog" name="' . $box_id . '-hide" type="checkbox" id="' . $box_id . '-hide" value="' . $box_id . '"' . (! in_array($box_id, $hidden) ? ' checked="checked"' : '') . ' />';
-				echo "{$box['title']}</label>\n";
+
+				$widget_title = $box['title'];
+
+				if ( is_array( $box['args'] ) && isset( $box['args']['__widget_basename'] ) ) {
+					$widget_title = $box['args']['__widget_basename'];
+				}
+
+				printf(
+					'<label for="%1$s-hide"><input class="hide-postbox-tog" name="%1$s-hide" type="checkbox" id="%1$s-hide" value="%1$s" %2$s />%3$s</label>',
+					esc_attr( $box['id'] ),
+					checked( in_array( $box['id'], $hidden ), false, false ),
+					$widget_title
+				);
 			}
 		}
 	}
@@ -117,7 +162,7 @@
 		}
 
 		/**
-		 * Filter the default list of hidden meta boxes.
+		 * Filters the default list of hidden meta boxes.
 		 *
 		 * @since 3.1.0
 		 *
@@ -128,7 +173,7 @@
 	}
 
 	/**
-	 * Filter the list of hidden meta boxes.
+	 * Filters the list of hidden meta boxes.
 	 *
 	 * @since 3.3.0
 	 *
@@ -162,7 +207,9 @@
  *
  * @since 3.1.0
  *
- * @return WP_Screen Current screen object
+ * @global WP_Screen $current_screen
+ *
+ * @return WP_Screen|null Current screen object or null when screen not defined.
  */
 function get_current_screen() {
 	global $current_screen;
@@ -179,1007 +226,8 @@
  * @since 3.0.0
  *
  * @param mixed $hook_name Optional. The hook name (also known as the hook suffix) used to determine the screen,
- *	or an existing screen object.
+ *	                       or an existing screen object.
  */
 function set_current_screen( $hook_name = '' ) {
 	WP_Screen::get( $hook_name )->set_current_screen();
 }
-
-/**
- * A class representing the admin screen.
- *
- * @since 3.3.0
- * @access public
- */
-final class WP_Screen {
-	/**
-	 * Any action associated with the screen. 'add' for *-add.php and *-new.php screens. Empty otherwise.
-	 *
-	 * @since 3.3.0
-	 * @var string
-	 * @access public
-	 */
-	public $action;
-
-	/**
-	 * The base type of the screen. This is typically the same as $id but with any post types and taxonomies stripped.
-	 * For example, for an $id of 'edit-post' the base is 'edit'.
-	 *
-	 * @since 3.3.0
-	 * @var string
-	 * @access public
-	 */
-	public $base;
-
-	/**
-	 * The number of columns to display. Access with get_columns().
-	 *
-	 * @since 3.4.0
-	 * @var int
-	 * @access private
-	 */
-	private $columns = 0;
-
-	/**
-	 * The unique ID of the screen.
-	 *
-	 * @since 3.3.0
-	 * @var string
-	 * @access public
-	 */
-	public $id;
-
-	/**
-	 * Which admin the screen is in. network | user | site | false
-	 *
-	 * @since 3.5.0
-	 * @var string
-	 * @access protected
-	 */
-	protected $in_admin;
-
-	/**
-	 * Whether the screen is in the network admin.
-	 *
-	 * Deprecated. Use in_admin() instead.
-	 *
-	 * @since 3.3.0
-	 * @deprecated 3.5.0
-	 * @var bool
-	 * @access public
-	 */
-	public $is_network;
-
-	/**
-	 * Whether the screen is in the user admin.
-	 *
-	 * Deprecated. Use in_admin() instead.
-	 *
-	 * @since 3.3.0
-	 * @deprecated 3.5.0
-	 * @var bool
-	 * @access public
-	 */
-	public $is_user;
-
-	/**
-	 * The base menu parent.
-	 * This is derived from $parent_file by removing the query string and any .php extension.
-	 * $parent_file values of 'edit.php?post_type=page' and 'edit.php?post_type=post' have a $parent_base of 'edit'.
-	 *
-	 * @since 3.3.0
-	 * @var string
-	 * @access public
-	 */
-	public $parent_base;
-
-	/**
-	 * The parent_file for the screen per the admin menu system.
-	 * Some $parent_file values are 'edit.php?post_type=page', 'edit.php', and 'options-general.php'.
-	 *
-	 * @since 3.3.0
-	 * @var string
-	 * @access public
-	 */
-	public $parent_file;
-
-	/**
-	 * The post type associated with the screen, if any.
-	 * The 'edit.php?post_type=page' screen has a post type of 'page'.
-	 * The 'edit-tags.php?taxonomy=$taxonomy&post_type=page' screen has a post type of 'page'.
-	 *
-	 * @since 3.3.0
-	 * @var string
-	 * @access public
-	 */
-	public $post_type;
-
-	/**
-	 * The taxonomy associated with the screen, if any.
-	 * The 'edit-tags.php?taxonomy=category' screen has a taxonomy of 'category'.
-	 * @since 3.3.0
-	 * @var string
-	 * @access public
-	 */
-	public $taxonomy;
-
-	/**
-	 * The help tab data associated with the screen, if any.
-	 *
-	 * @since 3.3.0
-	 * @var array
-	 * @access private
-	 */
-	private $_help_tabs = array();
-
-	/**
-	 * The help sidebar data associated with screen, if any.
-	 *
-	 * @since 3.3.0
-	 * @var string
-	 * @access private
-	 */
-	private $_help_sidebar = '';
-
-	/**
-	 * Stores old string-based help.
-	 */
-	private static $_old_compat_help = array();
-
-	/**
-	 * The screen options associated with screen, if any.
-	 *
-	 * @since 3.3.0
-	 * @var array
-	 * @access private
-	 */
-	private $_options = array();
-
-	/**
-	 * The screen object registry.
-	 *
-	 * @since 3.3.0
-	 * @var array
-	 * @access private
-	 */
-	private static $_registry = array();
-
-	/**
-	 * Stores the result of the public show_screen_options function.
-	 *
-	 * @since 3.3.0
-	 * @var bool
-	 * @access private
-	 */
-	private $_show_screen_options;
-
-	/**
-	 * Stores the 'screen_settings' section of screen options.
-	 *
-	 * @since 3.3.0
-	 * @var string
-	 * @access private
-	 */
-	private $_screen_settings;
-
-	/**
-	 * Fetches a screen object.
-	 *
-	 * @since 3.3.0
-	 * @access public
-	 *
-	 * @param string|WP_Screen $hook_name Optional. The hook name (also known as the hook suffix) used to determine the screen.
-	 * 	Defaults to the current $hook_suffix global.
-	 * @return WP_Screen Screen object.
-	 */
-	public static function get( $hook_name = '' ) {
-
-		if ( $hook_name instanceof WP_Screen ) {
-			return $hook_name;
-		}
-
-		$post_type = $taxonomy = null;
-		$in_admin = false;
-		$action = '';
-
-		if ( $hook_name )
-			$id = $hook_name;
-		else
-			$id = $GLOBALS['hook_suffix'];
-
-		// For those pesky meta boxes.
-		if ( $hook_name && post_type_exists( $hook_name ) ) {
-			$post_type = $id;
-			$id = 'post'; // changes later. ends up being $base.
-		} else {
-			if ( '.php' == substr( $id, -4 ) )
-				$id = substr( $id, 0, -4 );
-
-			if ( 'post-new' == $id || 'link-add' == $id || 'media-new' == $id || 'user-new' == $id ) {
-				$id = substr( $id, 0, -4 );
-				$action = 'add';
-			}
-		}
-
-		if ( ! $post_type && $hook_name ) {
-			if ( '-network' == substr( $id, -8 ) ) {
-				$id = substr( $id, 0, -8 );
-				$in_admin = 'network';
-			} elseif ( '-user' == substr( $id, -5 ) ) {
-				$id = substr( $id, 0, -5 );
-				$in_admin = 'user';
-			}
-
-			$id = sanitize_key( $id );
-			if ( 'edit-comments' != $id && 'edit-tags' != $id && 'edit-' == substr( $id, 0, 5 ) ) {
-				$maybe = substr( $id, 5 );
-				if ( taxonomy_exists( $maybe ) ) {
-					$id = 'edit-tags';
-					$taxonomy = $maybe;
-				} elseif ( post_type_exists( $maybe ) ) {
-					$id = 'edit';
-					$post_type = $maybe;
-				}
-			}
-
-			if ( ! $in_admin )
-				$in_admin = 'site';
-		} else {
-			if ( defined( 'WP_NETWORK_ADMIN' ) && WP_NETWORK_ADMIN )
-				$in_admin = 'network';
-			elseif ( defined( 'WP_USER_ADMIN' ) && WP_USER_ADMIN )
-				$in_admin = 'user';
-			else
-				$in_admin = 'site';
-		}
-
-		if ( 'index' == $id )
-			$id = 'dashboard';
-		elseif ( 'front' == $id )
-			$in_admin = false;
-
-		$base = $id;
-
-		// If this is the current screen, see if we can be more accurate for post types and taxonomies.
-		if ( ! $hook_name ) {
-			if ( isset( $_REQUEST['post_type'] ) )
-				$post_type = post_type_exists( $_REQUEST['post_type'] ) ? $_REQUEST['post_type'] : false;
-			if ( isset( $_REQUEST['taxonomy'] ) )
-				$taxonomy = taxonomy_exists( $_REQUEST['taxonomy'] ) ? $_REQUEST['taxonomy'] : false;
-
-			switch ( $base ) {
-				case 'post' :
-					if ( isset( $_GET['post'] ) )
-						$post_id = (int) $_GET['post'];
-					elseif ( isset( $_POST['post_ID'] ) )
-						$post_id = (int) $_POST['post_ID'];
-					else
-						$post_id = 0;
-
-					if ( $post_id ) {
-						$post = get_post( $post_id );
-						if ( $post )
-							$post_type = $post->post_type;
-					}
-					break;
-				case 'edit-tags' :
-					if ( null === $post_type && is_object_in_taxonomy( 'post', $taxonomy ? $taxonomy : 'post_tag' ) )
-						$post_type = 'post';
-					break;
-			}
-		}
-
-		switch ( $base ) {
-			case 'post' :
-				if ( null === $post_type )
-					$post_type = 'post';
-				$id = $post_type;
-				break;
-			case 'edit' :
-				if ( null === $post_type )
-					$post_type = 'post';
-				$id .= '-' . $post_type;
-				break;
-			case 'edit-tags' :
-				if ( null === $taxonomy )
-					$taxonomy = 'post_tag';
-				// The edit-tags ID does not contain the post type. Look for it in the request.
-				if ( null === $post_type ) {
-					$post_type = 'post';
-					if ( isset( $_REQUEST['post_type'] ) && post_type_exists( $_REQUEST['post_type'] ) )
-						$post_type = $_REQUEST['post_type'];
-				}
-
-				$id = 'edit-' . $taxonomy;
-				break;
-		}
-
-		if ( 'network' == $in_admin ) {
-			$id   .= '-network';
-			$base .= '-network';
-		} elseif ( 'user' == $in_admin ) {
-			$id   .= '-user';
-			$base .= '-user';
-		}
-
-		if ( isset( self::$_registry[ $id ] ) ) {
-			$screen = self::$_registry[ $id ];
-			if ( $screen === get_current_screen() )
-				return $screen;
-		} else {
-			$screen = new WP_Screen();
-			$screen->id     = $id;
-		}
-
-		$screen->base       = $base;
-		$screen->action     = $action;
-		$screen->post_type  = (string) $post_type;
-		$screen->taxonomy   = (string) $taxonomy;
-		$screen->is_user    = ( 'user' == $in_admin );
-		$screen->is_network = ( 'network' == $in_admin );
-		$screen->in_admin   = $in_admin;
-
-		self::$_registry[ $id ] = $screen;
-
-		return $screen;
-	}
-
-	/**
-	 * Makes the screen object the current screen.
-	 *
-	 * @see set_current_screen()
-	 * @since 3.3.0
-	 */
-	public function set_current_screen() {
-		global $current_screen, $taxnow, $typenow;
-		$current_screen = $this;
-		$taxnow = $this->taxonomy;
-		$typenow = $this->post_type;
-
-		/**
-		 * Fires after the current screen has been set.
-		 *
-		 * @since 3.0.0
-		 *
-		 * @param WP_Screen $current_screen Current WP_Screen object.
-		 */
-		do_action( 'current_screen', $current_screen );
-	}
-
-	/**
-	 * Constructor
-	 *
-	 * @since 3.3.0
-	 * @access private
-	 */
-	private function __construct() {}
-
-	/**
-	 * Indicates whether the screen is in a particular admin
-	 *
-	 * @since 3.5.0
-	 *
-	 * @param string $admin The admin to check against (network | user | site).
-	 * If empty any of the three admins will result in true.
-	 * @return boolean True if the screen is in the indicated admin, false otherwise.
-	 *
-	 */
-	public function in_admin( $admin = null ) {
-		if ( empty( $admin ) )
-			return (bool) $this->in_admin;
-
-		return ( $admin == $this->in_admin );
-	}
-
-	/**
-	 * Sets the old string-based contextual help for the screen.
-	 *
-	 * For backwards compatibility.
-	 *
-	 * @since 3.3.0
-	 *
-	 * @param WP_Screen $screen A screen object.
-	 * @param string $help Help text.
-	 */
-	public static function add_old_compat_help( $screen, $help ) {
-		self::$_old_compat_help[ $screen->id ] = $help;
-	}
-
-	/**
-	 * Set the parent information for the screen.
-	 * This is called in admin-header.php after the menu parent for the screen has been determined.
-	 *
-	 * @since 3.3.0
-	 *
-	 * @param string $parent_file The parent file of the screen. Typically the $parent_file global.
-	 */
-	public function set_parentage( $parent_file ) {
-		$this->parent_file = $parent_file;
-		list( $this->parent_base ) = explode( '?', $parent_file );
-		$this->parent_base = str_replace( '.php', '', $this->parent_base );
-	}
-
-	/**
-	 * Adds an option for the screen.
-	 * Call this in template files after admin.php is loaded and before admin-header.php is loaded to add screen options.
-	 *
-	 * @since 3.3.0
-	 *
-	 * @param string $option Option ID
-	 * @param mixed $args Option-dependent arguments.
-	 */
-	public function add_option( $option, $args = array() ) {
-		$this->_options[ $option ] = $args;
-	}
-
-	/**
-	 * Remove an option from the screen.
-	 *
-	 * @since 3.8.0
-	 *
-	 * @param string $option Option ID.
-	 */
-	public function remove_option( $option ) {
-		unset( $this->_options[ $option ] );
-	}
-
-	/**
-	 * Remove all options from the screen.
-	 *
-	 * @since 3.8.0
-	 */
-	public function remove_options() {
-		$this->_options = array();
-	}
-
-	/**
-	 * Get the options registered for the screen.
-	 *
-	 * @since 3.8.0
-	 *
-	 * @return array Options with arguments.
-	 */
-	public function get_options() {
-		return $this->_options;
-	}
-
-	/**
-	 * Gets the arguments for an option for the screen.
-	 *
-	 * @since 3.3.0
-	 *
-	 * @param string $option Option name.
-	 * @param string $key    Optional. Specific array key for when the option is an array.
-	 *                       Default false.
-	 * @return string The option value if set, null otherwise.
-	 */
-	public function get_option( $option, $key = false ) {
-		if ( ! isset( $this->_options[ $option ] ) )
-			return null;
-		if ( $key ) {
-			if ( isset( $this->_options[ $option ][ $key ] ) )
-				return $this->_options[ $option ][ $key ];
-			return null;
-		}
-		return $this->_options[ $option ];
-	}
-
-	/**
-	 * Gets the help tabs registered for the screen.
-	 *
-	 * @since 3.4.0
-	 *
-	 * @return array Help tabs with arguments.
-	 */
-	public function get_help_tabs() {
-		return $this->_help_tabs;
-	}
-
-	/**
-	 * Gets the arguments for a help tab.
-	 *
-	 * @since 3.4.0
-	 *
-	 * @param string $id Help Tab ID.
-	 * @return array Help tab arguments.
-	 */
-	public function get_help_tab( $id ) {
-		if ( ! isset( $this->_help_tabs[ $id ] ) )
-			return null;
-		return $this->_help_tabs[ $id ];
-	}
-
-	/**
-	 * Add a help tab to the contextual help for the screen.
-	 * Call this on the load-$pagenow hook for the relevant screen.
-	 *
-	 * @since 3.3.0
-	 *
-	 * @param array $args
-	 * - string   - title    - Title for the tab.
-	 * - string   - id       - Tab ID. Must be HTML-safe.
-	 * - string   - content  - Help tab content in plain text or HTML. Optional.
-	 * - callback - callback - A callback to generate the tab content. Optional.
-	 *
-	 */
-	public function add_help_tab( $args ) {
-		$defaults = array(
-			'title'    => false,
-			'id'       => false,
-			'content'  => '',
-			'callback' => false,
-		);
-		$args = wp_parse_args( $args, $defaults );
-
-		$args['id'] = sanitize_html_class( $args['id'] );
-
-		// Ensure we have an ID and title.
-		if ( ! $args['id'] || ! $args['title'] )
-			return;
-
-		// Allows for overriding an existing tab with that ID.
-		$this->_help_tabs[ $args['id'] ] = $args;
-	}
-
-	/**
-	 * Removes a help tab from the contextual help for the screen.
-	 *
-	 * @since 3.3.0
-	 *
-	 * @param string $id The help tab ID.
-	 */
-	public function remove_help_tab( $id ) {
-		unset( $this->_help_tabs[ $id ] );
-	}
-
-	/**
-	 * Removes all help tabs from the contextual help for the screen.
-	 *
-	 * @since 3.3.0
-	 */
-	public function remove_help_tabs() {
-		$this->_help_tabs = array();
-	}
-
-	/**
-	 * Gets the content from a contextual help sidebar.
-	 *
-	 * @since 3.4.0
-	 *
-	 * @return string Contents of the help sidebar.
-	 */
-	public function get_help_sidebar() {
-		return $this->_help_sidebar;
-	}
-
-	/**
-	 * Add a sidebar to the contextual help for the screen.
-	 * Call this in template files after admin.php is loaded and before admin-header.php is loaded to add a sidebar to the contextual help.
-	 *
-	 * @since 3.3.0
-	 *
-	 * @param string $content Sidebar content in plain text or HTML.
-	 */
-	public function set_help_sidebar( $content ) {
-		$this->_help_sidebar = $content;
-	}
-
-	/**
-	 * Gets the number of layout columns the user has selected.
-	 *
-	 * The layout_columns option controls the max number and default number of
-	 * columns. This method returns the number of columns within that range selected
-	 * by the user via Screen Options. If no selection has been made, the default
-	 * provisioned in layout_columns is returned. If the screen does not support
-	 * selecting the number of layout columns, 0 is returned.
-	 *
-	 * @since 3.4.0
-	 *
-	 * @return int Number of columns to display.
-	 */
-	public function get_columns() {
-		return $this->columns;
-	}
-
-	/**
-	 * Render the screen's help section.
-	 *
-	 * This will trigger the deprecated filters for backwards compatibility.
-	 *
-	 * @since 3.3.0
-	 */
-	public function render_screen_meta() {
-
-		/**
-		 * Filter the legacy contextual help list.
-		 *
-		 * @since 2.7.0
-		 * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or
-		 *                   get_current_screen()->remove_help_tab() instead.
-		 *
-		 * @param array     $old_compat_help Old contextual help.
-		 * @param WP_Screen $this            Current WP_Screen instance.
-		 */
-		self::$_old_compat_help = apply_filters( 'contextual_help_list', self::$_old_compat_help, $this );
-
-		$old_help = isset( self::$_old_compat_help[ $this->id ] ) ? self::$_old_compat_help[ $this->id ] : '';
-
-		/**
-		 * Filter the legacy contextual help text.
-		 *
-		 * @since 2.7.0
-		 * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or
-		 *                   get_current_screen()->remove_help_tab() instead.
-		 *
-		 * @param string    $old_help  Help text that appears on the screen.
-		 * @param string    $screen_id Screen ID.
-		 * @param WP_Screen $this      Current WP_Screen instance.
-		 *
-		 */
-		$old_help = apply_filters( 'contextual_help', $old_help, $this->id, $this );
-
-		// Default help only if there is no old-style block of text and no new-style help tabs.
-		if ( empty( $old_help ) && ! $this->get_help_tabs() ) {
-
-			/**
-			 * Filter the default legacy contextual help text.
-			 *
-			 * @since 2.8.0
-			 * @deprecated 3.3.0 Use get_current_screen()->add_help_tab() or
-			 *                   get_current_screen()->remove_help_tab() instead.
-			 *
-			 * @param string $old_help_default Default contextual help text.
-			 */
-			$default_help = apply_filters( 'default_contextual_help', '' );
-			if ( $default_help )
-				$old_help = '<p>' . $default_help . '</p>';
-		}
-
-		if ( $old_help ) {
-			$this->add_help_tab( array(
-				'id'      => 'old-contextual-help',
-				'title'   => __('Overview'),
-				'content' => $old_help,
-			) );
-		}
-
-		$help_sidebar = $this->get_help_sidebar();
-
-		$help_class = 'hidden';
-		if ( ! $help_sidebar )
-			$help_class .= ' no-sidebar';
-
-		// Time to render!
-		?>
-		<div id="screen-meta" class="metabox-prefs">
-
-			<div id="contextual-help-wrap" class="<?php echo esc_attr( $help_class ); ?>" tabindex="-1" aria-label="<?php esc_attr_e('Contextual Help Tab'); ?>">
-				<div id="contextual-help-back"></div>
-				<div id="contextual-help-columns">
-					<div class="contextual-help-tabs">
-						<ul>
-						<?php
-						$class = ' class="active"';
-						foreach ( $this->get_help_tabs() as $tab ) :
-							$link_id  = "tab-link-{$tab['id']}";
-							$panel_id = "tab-panel-{$tab['id']}";
-							?>
-
-							<li id="<?php echo esc_attr( $link_id ); ?>"<?php echo $class; ?>>
-								<a href="<?php echo esc_url( "#$panel_id" ); ?>" aria-controls="<?php echo esc_attr( $panel_id ); ?>">
-									<?php echo esc_html( $tab['title'] ); ?>
-								</a>
-							</li>
-						<?php
-							$class = '';
-						endforeach;
-						?>
-						</ul>
-					</div>
-
-					<?php if ( $help_sidebar ) : ?>
-					<div class="contextual-help-sidebar">
-						<?php echo $help_sidebar; ?>
-					</div>
-					<?php endif; ?>
-
-					<div class="contextual-help-tabs-wrap">
-						<?php
-						$classes = 'help-tab-content active';
-						foreach ( $this->get_help_tabs() as $tab ):
-							$panel_id = "tab-panel-{$tab['id']}";
-							?>
-
-							<div id="<?php echo esc_attr( $panel_id ); ?>" class="<?php echo $classes; ?>">
-								<?php
-								// Print tab content.
-								echo $tab['content'];
-
-								// If it exists, fire tab callback.
-								if ( ! empty( $tab['callback'] ) )
-									call_user_func_array( $tab['callback'], array( $this, $tab ) );
-								?>
-							</div>
-						<?php
-							$classes = 'help-tab-content';
-						endforeach;
-						?>
-					</div>
-				</div>
-			</div>
-		<?php
-		// Setup layout columns
-
-		/**
-		 * Filter the array of screen layout columns.
-		 *
-		 * This hook provides back-compat for plugins using the back-compat
-		 * filter instead of add_screen_option().
-		 *
-		 * @since 2.8.0
-		 *
-		 * @param array     $empty_columns Empty array.
-		 * @param string    $screen_id     Screen ID.
-		 * @param WP_Screen $this          Current WP_Screen instance.
-		 */
-		$columns = apply_filters( 'screen_layout_columns', array(), $this->id, $this );
-
-		if ( ! empty( $columns ) && isset( $columns[ $this->id ] ) )
-			$this->add_option( 'layout_columns', array('max' => $columns[ $this->id ] ) );
-
-		if ( $this->get_option( 'layout_columns' ) ) {
-			$this->columns = (int) get_user_option("screen_layout_$this->id");
-
-			if ( ! $this->columns && $this->get_option( 'layout_columns', 'default' ) )
-				$this->columns = $this->get_option( 'layout_columns', 'default' );
-		}
-		$GLOBALS[ 'screen_layout_columns' ] = $this->columns; // Set the global for back-compat.
-
-		// Add screen options
-		if ( $this->show_screen_options() )
-			$this->render_screen_options();
-		?>
-		</div>
-		<?php
-		if ( ! $this->get_help_tabs() && ! $this->show_screen_options() )
-			return;
-		?>
-		<div id="screen-meta-links">
-		<?php if ( $this->get_help_tabs() ) : ?>
-			<div id="contextual-help-link-wrap" class="hide-if-no-js screen-meta-toggle">
-			<a href="#contextual-help-wrap" id="contextual-help-link" class="show-settings" aria-controls="contextual-help-wrap" aria-expanded="false"><?php _e( 'Help' ); ?></a>
-			</div>
-		<?php endif;
-		if ( $this->show_screen_options() ) : ?>
-			<div id="screen-options-link-wrap" class="hide-if-no-js screen-meta-toggle">
-			<a href="#screen-options-wrap" id="show-settings-link" class="show-settings" aria-controls="screen-options-wrap" aria-expanded="false"><?php _e( 'Screen Options' ); ?></a>
-			</div>
-		<?php endif; ?>
-		</div>
-		<?php
-	}
-
-	public function show_screen_options() {
-		global $wp_meta_boxes;
-
-		if ( is_bool( $this->_show_screen_options ) )
-			return $this->_show_screen_options;
-
-		$columns = get_column_headers( $this );
-
-		$show_screen = ! empty( $wp_meta_boxes[ $this->id ] ) || $columns || $this->get_option( 'per_page' );
-
-		switch ( $this->base ) {
-			case 'widgets':
-				$this->_screen_settings = '<p><a id="access-on" href="widgets.php?widgets-access=on">' . __('Enable accessibility mode') . '</a><a id="access-off" href="widgets.php?widgets-access=off">' . __('Disable accessibility mode') . "</a></p>\n";
-				break;
-			case 'post' :
-				$expand = '<div class="editor-expand hidden"><label for="editor-expand-toggle">';
-				$expand .= '<input type="checkbox" id="editor-expand-toggle"' . checked( get_user_setting( 'editor_expand', 'on' ), 'on', false ) . ' />';
-				$expand .= __( 'Enable full-height editor and distraction-free functionality.' ) . '</label></div>';
-				$this->_screen_settings = $expand;
-				break;
-			default:
-				$this->_screen_settings = '';
-				break;
-		}
-
-		/**
-		 * Filter the screen settings text displayed in the Screen Options tab.
-		 *
-		 * This filter is currently only used on the Widgets screen to enable
-		 * accessibility mode.
-		 *
-		 * @since 3.0.0
-		 *
-		 * @param string    $screen_settings Screen settings.
-		 * @param WP_Screen $this            WP_Screen object.
-		 */
-		$this->_screen_settings = apply_filters( 'screen_settings', $this->_screen_settings, $this );
-
-		if ( $this->_screen_settings || $this->_options )
-			$show_screen = true;
-
-		/**
-		 * Filter whether to show the Screen Options tab.
-		 *
-		 * @since 3.2.0
-		 *
-		 * @param bool      $show_screen Whether to show Screen Options tab.
-		 *                               Default true.
-		 * @param WP_Screen $this        Current WP_Screen instance.
-		 */
-		$this->_show_screen_options = apply_filters( 'screen_options_show_screen', $show_screen, $this );
-		return $this->_show_screen_options;
-	}
-
-	/**
-	 * Render the screen options tab.
-	 *
-	 * @since 3.3.0
-	 */
-	public function render_screen_options() {
-		global $wp_meta_boxes;
-
-		$columns = get_column_headers( $this );
-		$hidden  = get_hidden_columns( $this );
-
-		?>
-		<div id="screen-options-wrap" class="hidden" tabindex="-1" aria-label="<?php esc_attr_e('Screen Options Tab'); ?>">
-		<form id="adv-settings" method="post">
-		<?php if ( isset( $wp_meta_boxes[ $this->id ] ) || $this->get_option( 'per_page' ) || ( $columns && empty( $columns['_title'] ) ) ) : ?>
-			<h5><?php _e( 'Show on screen' ); ?></h5>
-		<?php
-		endif;
-
-		if ( isset( $wp_meta_boxes[ $this->id ] ) ) : ?>
-			<div class="metabox-prefs">
-				<?php
-					meta_box_prefs( $this );
-
-					if ( 'dashboard' === $this->id && has_action( 'welcome_panel' ) && current_user_can( 'edit_theme_options' ) ) {
-						if ( isset( $_GET['welcome'] ) ) {
-							$welcome_checked = empty( $_GET['welcome'] ) ? 0 : 1;
-							update_user_meta( get_current_user_id(), 'show_welcome_panel', $welcome_checked );
-						} else {
-							$welcome_checked = get_user_meta( get_current_user_id(), 'show_welcome_panel', true );
-							if ( 2 == $welcome_checked && wp_get_current_user()->user_email != get_option( 'admin_email' ) )
-								$welcome_checked = false;
-						}
-						echo '<label for="wp_welcome_panel-hide">';
-						echo '<input type="checkbox" id="wp_welcome_panel-hide"' . checked( (bool) $welcome_checked, true, false ) . ' />';
-						echo _x( 'Welcome', 'Welcome panel' ) . "</label>\n";
-					}
-				?>
-				<br class="clear" />
-			</div>
-			<?php endif;
-			if ( $columns ) :
-				if ( ! empty( $columns['_title'] ) ) : ?>
-			<h5><?php echo $columns['_title']; ?></h5>
-			<?php endif; ?>
-			<div class="metabox-prefs">
-				<?php
-				$special = array('_title', 'cb', 'comment', 'media', 'name', 'title', 'username', 'blogname');
-
-				foreach ( $columns as $column => $title ) {
-					// Can't hide these for they are special
-					if ( in_array( $column, $special ) )
-						continue;
-					if ( empty( $title ) )
-						continue;
-
-					if ( 'comments' == $column )
-						$title = __( 'Comments' );
-					$id = "$column-hide";
-					echo '<label for="' . $id . '">';
-					echo '<input class="hide-column-tog" name="' . $id . '" type="checkbox" id="' . $id . '" value="' . $column . '"' . checked( !in_array($column, $hidden), true, false ) . ' />';
-					echo "$title</label>\n";
-				}
-				?>
-				<br class="clear" />
-			</div>
-		<?php endif;
-
-		$this->render_screen_layout();
-		$this->render_per_page_options();
-		echo $this->_screen_settings;
-
-		?>
-		<div><?php wp_nonce_field( 'screen-options-nonce', 'screenoptionnonce', false ); ?></div>
-		</form>
-		</div>
-		<?php
-	}
-
-	/**
-	 * Render the option for number of columns on the page
-	 *
-	 * @since 3.3.0
-	 */
-	public function render_screen_layout() {
-		if ( ! $this->get_option('layout_columns') )
-			return;
-
-		$screen_layout_columns = $this->get_columns();
-		$num = $this->get_option( 'layout_columns', 'max' );
-
-		?>
-		<h5 class="screen-layout"><?php _e('Screen Layout'); ?></h5>
-		<div class='columns-prefs'><?php
-			_e('Number of Columns:');
-			for ( $i = 1; $i <= $num; ++$i ):
-				?>
-				<label class="columns-prefs-<?php echo $i; ?>">
-					<input type='radio' name='screen_columns' value='<?php echo esc_attr( $i ); ?>'
-						<?php checked( $screen_layout_columns, $i ); ?> />
-					<?php echo esc_html( $i ); ?>
-				</label>
-				<?php
-			endfor; ?>
-		</div>
-		<?php
-	}
-
-	/**
-	 * Render the items per page option
-	 *
-	 * @since 3.3.0
-	 */
-	public function render_per_page_options() {
-		if ( null === $this->get_option( 'per_page' ) ) {
-			return;
-		}
-
-		$per_page_label = $this->get_option( 'per_page', 'label' );
-		if ( null === $per_page_label ) {
-			$per_page_label = __( 'Number of items per page:' );
-		}
-
-		$option = $this->get_option( 'per_page', 'option' );
-		if ( ! $option ) {
-			$option = str_replace( '-', '_', "{$this->id}_per_page" );
-		}
-
-		$per_page = (int) get_user_option( $option );
-		if ( empty( $per_page ) || $per_page < 1 ) {
-			$per_page = $this->get_option( 'per_page', 'default' );
-			if ( ! $per_page ) {
-				$per_page = 20;
-			}
-		}
-
-		if ( 'edit_comments_per_page' == $option ) {
-			$comment_status = isset( $_REQUEST['comment_status'] ) ? $_REQUEST['comment_status'] : 'all';
-
-			/** This filter is documented in wp-admin/includes/class-wp-comments-list-table.php */
-			$per_page = apply_filters( 'comments_per_page', $per_page, $comment_status );
-		} elseif ( 'categories_per_page' == $option ) {
-			/** This filter is documented in wp-admin/includes/class-wp-terms-list-table.php */
-			$per_page = apply_filters( 'edit_categories_per_page', $per_page );
-		} else {
-			/** This filter is documented in wp-admin/includes/class-wp-list-table.php */
-			$per_page = apply_filters( $option, $per_page );
-		}
-
-		// Back compat
-		if ( isset( $this->post_type ) ) {
-			/** This filter is documented in wp-admin/includes/class-wp-posts-list-table.php */
-			$per_page = apply_filters( 'edit_posts_per_page', $per_page, $this->post_type );
-		}
-
-		?>
-		<div class="screen-options">
-			<?php if ( $per_page_label ) : ?>
-				<label for="<?php echo esc_attr( $option ); ?>"><?php echo $per_page_label; ?></label>
-				<input type="number" step="1" min="1" max="999" class="screen-per-page" name="wp_screen_options[value]"
-					id="<?php echo esc_attr( $option ); ?>" maxlength="3"
-					value="<?php echo esc_attr( $per_page ); ?>" />
-			<?php endif;
-
-			echo get_submit_button( __( 'Apply' ), 'button', 'screen-options-apply', false ); ?>
-			<input type="hidden" name="wp_screen_options[option]" value="<?php echo esc_attr( $option ); ?>" />
-		</div>
-		<?php
-	}
-}