]> scripts.mit.edu Git - autoinstalls/wordpress.git/blobdiff - wp-admin/includes/screen.php
Wordpress 3.3
[autoinstalls/wordpress.git] / wp-admin / includes / screen.php
diff --git a/wp-admin/includes/screen.php b/wp-admin/includes/screen.php
new file mode 100644 (file)
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+<?php
+/**
+ * WordPress Administration Screen API.
+ *
+ * @package WordPress
+ * @subpackage Administration
+ */
+
+/**
+ * Get the column headers for a screen
+ *
+ * @since 2.7.0
+ *
+ * @param string|WP_Screen $screen The screen you want the headers for
+ * @return array Containing the headers in the format id => UI String
+ */
+function get_column_headers( $screen ) {
+       if ( is_string( $screen ) )
+               $screen = convert_to_screen( $screen );
+
+       static $column_headers = array();
+
+       if ( ! isset( $column_headers[ $screen->id ] ) )
+               $column_headers[ $screen->id ] = apply_filters( 'manage_' . $screen->id . '_columns', array() );
+
+       return $column_headers[ $screen->id ];
+}
+
+/**
+ * Get a list of hidden columns.
+ *
+ * @since 2.7.0
+ *
+ * @param string|WP_Screen $screen The screen you want the hidden columns for
+ * @return array
+ */
+function get_hidden_columns( $screen ) {
+       if ( is_string( $screen ) )
+               $screen = convert_to_screen( $screen );
+
+       return (array) get_user_option( 'manage' . $screen->id . 'columnshidden' );
+}
+
+/**
+ * Prints the meta box preferences for screen meta.
+ *
+ * @since 2.7.0
+ *
+ * @param string|WP_Screen $screen
+ */
+function meta_box_prefs( $screen ) {
+       global $wp_meta_boxes;
+
+       if ( is_string( $screen ) )
+               $screen = convert_to_screen( $screen );
+
+       if ( empty($wp_meta_boxes[$screen->id]) )
+               return;
+
+       $hidden = get_hidden_meta_boxes($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 ) {
+                               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";
+                       }
+               }
+       }
+}
+
+/**
+ * Get Hidden Meta Boxes
+ *
+ * @since 2.7.0
+ *
+ * @param string|WP_Screen $screen Screen identifier
+ * @return array Hidden Meta Boxes
+ */
+function get_hidden_meta_boxes( $screen ) {
+       if ( is_string( $screen ) )
+               $screen = convert_to_screen( $screen );
+
+       $hidden = get_user_option( "metaboxhidden_{$screen->id}" );
+
+       $use_defaults = ! is_array( $hidden );
+
+       // Hide slug boxes by default
+       if ( $use_defaults ) {
+               $hidden = array();
+               if ( 'post' == $screen->base ) {
+                       if ( 'post' == $screen->post_type || 'page' == $screen->post_type )
+                               $hidden = array('slugdiv', 'trackbacksdiv', 'postcustom', 'postexcerpt', 'commentstatusdiv', 'commentsdiv', 'authordiv', 'revisionsdiv');
+                       else
+                               $hidden = array( 'slugdiv' );
+               }
+               $hidden = apply_filters( 'default_hidden_meta_boxes', $hidden, $screen );
+       }
+
+       return apply_filters( 'hidden_meta_boxes', $hidden, $screen, $use_defaults );
+}
+
+/**
+ * Register and configure an admin screen option
+ *
+ * @since 3.1.0
+ *
+ * @param string $option An option name.
+ * @param mixed $args Option-dependent arguments.
+ * @return void
+ */
+function add_screen_option( $option, $args = array() ) {
+       $current_screen = get_current_screen();
+
+       if ( ! $current_screen )
+               return;
+
+       $current_screen->add_option( $option, $args );
+}
+
+/**
+ * Displays a screen icon.
+ *
+ * @uses get_screen_icon()
+ * @since 2.7.0
+ *
+ * @param string|WP_Screen $screen Optional. Accepts a screen object (and defaults to the current screen object)
+ *     which it uses to determine an icon HTML ID. Or, if a string is provided, it is used to form the icon HTML ID.
+ */
+function screen_icon( $screen = '' ) {
+       echo get_screen_icon( $screen );
+}
+
+/**
+ * Gets a screen icon.
+ *
+ * @since 3.2.0
+ *
+ * @param string|WP_Screen $screen Optional. Accepts a screen object (and defaults to the current screen object)
+ *     which it uses to determine an icon HTML ID. Or, if a string is provided, it is used to form the icon HTML ID.
+ * @return string HTML for the screen icon.
+ */
+function get_screen_icon( $screen = '' ) {
+       if ( empty( $screen ) )
+               $screen = get_current_screen();
+       elseif ( is_string( $screen ) )
+               $icon_id = $screen;
+
+       $class = 'icon32';
+
+       if ( empty( $icon_id ) ) {
+               if ( ! empty( $screen->parent_base ) )
+                       $icon_id = $screen->parent_base;
+               else
+                       $icon_id = $screen->base;
+
+               if ( 'page' == $screen->post_type )
+                       $icon_id = 'edit-pages';
+
+               if ( $screen->post_type )
+                       $class .= ' ' . sanitize_html_class( 'icon32-posts-' . $screen->post_type );
+       }
+
+       return '<div id="icon-' . esc_attr( $icon_id ) . '" class="' . $class . '"><br /></div>';
+}
+
+/**
+ * Get the current screen object
+ *
+ * @since 3.1.0
+ *
+ * @return object Current screen object
+ */
+function get_current_screen() {
+       global $current_screen;
+
+       if ( ! isset( $current_screen ) )
+               return null;
+
+       return $current_screen;
+}
+
+/**
+ * Set the current screen object
+ *
+ * @since 3.0.0
+ * @uses $current_screen
+ *
+ * @param mixed $hook_name Optional. The hook name (also known as the hook suffix) used to determine the screen,
+ *     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 unique ID of the screen.
+        *
+        * @since 3.3.0
+        * @var string
+        * @access public
+        */
+       public $id;
+
+       /**
+        * Whether the screen is in the network admin.
+        *
+        * @since 3.3.0
+        * @var bool
+        * @access public
+        */
+       public $is_network;
+
+       /**
+        * Whether the screen is in the user admin.
+        *
+        * @since 3.3.0
+        * @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 $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 ( is_a( $hook_name, 'WP_Screen' ) )
+                       return $hook_name;
+
+               $post_type = $taxonomy = null;
+               $is_network = $is_user = 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 );
+                               $is_network = true;
+                       } elseif ( '-user' == substr( $id, -5 ) ) {
+                               $id = substr( $id, 0, -5 );
+                               $is_user = true;
+                       }
+
+                       $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;
+                               }
+                       }
+               } else {
+                       $is_network = is_network_admin();
+                       $is_user = is_user_admin();
+               }
+
+               if ( 'index' == $id )
+                       $id = 'dashboard';
+
+               $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';
+                               $id = 'edit-' . $taxonomy;
+                               break;
+               }
+
+               if ( $is_network ) {
+                       $id   .= '-network';
+                       $base .= '-network';
+               } elseif ( $is_user ) {
+                       $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    = $is_user;
+               $screen->is_network = $is_network;
+
+               self::$_registry[ $id ] = $screen;
+
+               return $screen;
+       }
+
+       /**
+        * Makes the screen object the current screen.
+        *
+        * @see set_current_screen()
+        * @since 3.3.0
+        */
+       function set_current_screen() {
+               global $current_screen, $taxnow, $typenow;
+               $current_screen = $this;
+               $taxnow = $this->taxonomy;
+               $typenow = $this->post_type;
+               do_action( 'current_screen', $current_screen );
+       }
+
+       /**
+        * Constructor
+        *
+        * @since 3.3.0
+        * @access private
+        */
+       private function __construct() {}
+
+       /**
+        * 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.
+        */
+       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.
+        */
+       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;
+       }
+
+       /**
+        * Gets the arguments for an option for the screen.
+        *
+        * @since 3.3.0
+        *
+        * @param string
+        */
+       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[ $option ];
+       }
+
+       /**
+        * Add a help tab to the contextual help for the screen.
+        * Call this on the load-$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;
+
+               $this->_help_tabs[] = $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();
+       }
+
+       /**
+        * 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 = $content;
+       }
+
+       /**
+        * Render the screen's help section.
+        *
+        * This will trigger the deprecated filters for backwards compatibility.
+        *
+        * @since 3.3.0
+        */
+       public function render_screen_meta() {
+
+               // Call old contextual_help_list filter.
+               self::$_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 ] : '';
+               $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 ) && empty( $this->_help_tabs ) ) {
+                       $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,
+                       ) );
+               }
+
+               $has_sidebar = ! empty( $this->_help_sidebar );
+
+               $help_class = 'hidden';
+               if ( ! $has_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 ); ?>">
+                               <div id="contextual-help-back"></div>
+                               <div id="contextual-help-columns">
+                                       <div class="contextual-help-tabs">
+                                               <ul>
+                                               <?php foreach ( $this->_help_tabs as $i => $tab ):
+                                                       $link_id  = "tab-link-{$tab['id']}";
+                                                       $panel_id = "tab-panel-{$tab['id']}";
+                                                       $classes  = ( $i == 0 ) ? 'active' : '';
+                                                       ?>
+
+                                                       <li id="<?php echo esc_attr( $link_id ); ?>" class="<?php echo esc_attr( $classes ); ?>">
+                                                               <a href="<?php echo esc_url( "#$panel_id" ); ?>">
+                                                                       <?php echo esc_html( $tab['title'] ); ?>
+                                                               </a>
+                                                       </li>
+                                               <?php endforeach; ?>
+                                               </ul>
+                                       </div>
+
+                                       <?php if ( $has_sidebar ) : ?>
+                                       <div class="contextual-help-sidebar">
+                                               <?php echo self::$this->_help_sidebar; ?>
+                                       </div>
+                                       <?php endif; ?>
+
+                                       <div class="contextual-help-tabs-wrap">
+                                               <?php foreach ( $this->_help_tabs as $i => $tab ):
+                                                       $panel_id = "tab-panel-{$tab['id']}";
+                                                       $classes  = ( $i == 0 ) ? 'active' : '';
+                                                       $classes .= ' help-tab-content';
+                                                       ?>
+
+                                                       <div id="<?php echo esc_attr( $panel_id ); ?>" class="<?php echo esc_attr( $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 endforeach; ?>
+                                       </div>
+                               </div>
+                       </div>
+               <?php
+               // Add screen options
+               if ( $this->show_screen_options() )
+                       $this->render_screen_options();
+               ?>
+               </div>
+               <?php
+               if ( ! $this->_help_tabs && ! $this->show_screen_options() )
+                       return;
+               ?>
+               <div id="screen-meta-links">
+               <?php if ( $this->_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"><?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"><?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' );
+
+               $this->_screen_settings = apply_filters( 'screen_settings', '', $this );
+
+               switch ( $this->id ) {
+                       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;
+               }
+
+               if ( $this->_screen_settings || $this->_options )
+                       $show_screen = true;
+
+               $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, $wp_list_table;
+
+               $columns = get_column_headers( $this );
+               $hidden  = get_hidden_columns( $this );
+
+               ?>
+               <div id="screen-options-wrap" class="hidden">
+               <form id="adv-settings" action="" method="post">
+               <?php
+               if ( isset( $wp_meta_boxes[ $this->id ] ) ) : ?>
+                       <h5><?php _ex('Show on screen', 'Metaboxes') ?></h5>
+                       <div class="metabox-prefs">
+                               <?php
+                                       meta_box_prefs( $this );
+
+                                       if ( 'dashboard' === $this->id && 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 __( 'Welcome' ) . "</label>\n";
+                                       }
+                               ?>
+                               <br class="clear" />
+                       </div>
+                       <?php endif;
+                       if ( ! empty( $columns ) ) : ?>
+                       <h5><?php echo ( isset( $columns['_title'] ) ?  $columns['_title'] :  _x('Show on screen', 'Columns') ) ?></h5>
+                       <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
+        */
+       function render_screen_layout() {
+               global $screen_layout_columns;
+
+               // Back compat for plugins using the filter instead of add_screen_option()
+               $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') ) {
+                       $screen_layout_columns = 0;
+                       return;
+               }
+
+               $screen_layout_columns = get_user_option("screen_layout_$this->id");
+               $num = $this->get_option( 'layout_columns', 'max' );
+
+               if ( ! $screen_layout_columns || 'auto' == $screen_layout_columns ) {
+                       if ( $this->get_option( 'layout_columns', 'default' ) )
+                               $screen_layout_columns = $this->get_option( 'layout_columns', 'default' );
+               }
+
+               ?>
+               <h5><?php _e('Screen Layout'); ?></h5>
+               <div class='columns-prefs'><?php
+                       _e('Number of Columns:');
+                       for ( $i = 1; $i <= $num; ++$i ):
+                               ?>
+                               <label>
+                                       <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
+        */
+       function render_per_page_options() {
+               if ( ! $this->get_option( 'per_page' ) )
+                       return;
+
+               $per_page_label = $this->get_option( 'per_page', 'label' );
+
+               $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';
+                       $per_page = apply_filters( 'comments_per_page', $per_page, $comment_status );
+               } elseif ( 'categories_per_page' == $option ) {
+                       $per_page = apply_filters( 'edit_categories_per_page', $per_page );
+               } else {
+                       $per_page = apply_filters( $option, $per_page );
+               }
+
+               // Back compat
+               if ( isset( $this->post_type ) )
+                       $per_page = apply_filters( 'edit_posts_per_page', $per_page, $this->post_type );
+
+               ?>
+               <h5><?php _ex('Show on screen', 'Screen Options') ?></h5>
+               <div class='screen-options'>
+                       <?php if ( !empty($per_page_label) ): ?>
+                               <input type='text' class='screen-per-page' name='wp_screen_options[value]'
+                                       id='<?php echo esc_attr( $option ); ?>' maxlength='3'
+                                       value='<?php echo esc_attr( $per_page ); ?>' />
+                               <label for='<?php echo esc_attr( $option ); ?>'>
+                                       <?php echo esc_html( $per_page_label ); ?>
+                               </label>
+                       <?php endif;
+
+                       echo get_submit_button( __( 'Apply' ), 'button', 'screen-options-apply', false ); ?>
+                       <input type='hidden' name='wp_screen_options[option]' value='<?php echo esc_attr($option); ?>' />
+               </div>
+               <?php
+       }
+}