\n";
}
/**
* Convert a screen string to a screen object
*
* @since 3.0.0
*
* @param string $screen The name of the screen
* @return object An object containing the safe screen name and id
*/
function convert_to_screen( $screen ) { // TODO: fold into WP_Screen
$screen = str_replace( array('.php', '-new', '-add', '-network', '-user' ), '', $screen);
if ( is_network_admin() )
$screen .= '-network';
elseif ( is_user_admin() )
$screen .= '-user';
// why do we need this? $screen = (string) apply_filters( 'screen_meta_screen', $screen );
$screen = (object) array('id' => $screen, 'base' => $screen);
return $screen;
}
/**
* Add contextual help text for a page.
*
* Creates a 'Screen Info' help tab.
*
* @since 2.7.0
*
* @param string $screen The handle for the screen to add help to. This is usually the hook name returned by the add_*_page() functions.
* @param string $help The content of a 'Screen Info' help tab.
*/
function add_contextual_help($screen, $help) { // TODO: deprecate
global $_wp_contextual_help;
if ( is_string($screen) )
$screen = convert_to_screen($screen);
if ( !isset($_wp_contextual_help) )
$_wp_contextual_help = array();
$_wp_contextual_help[$screen->id] = $help;
}
/**
* 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() ) { // TODO: set deprecated
$current_screen = get_current_screen();
if ( ! $current_screen )
return;
return $current_screen->add_option( $option, $args );
}
function screen_icon( $screen = '' ) { // TODO: fold into WP_Screen
echo get_screen_icon( $screen );
}
function get_screen_icon( $screen = '' ) { // TODO: fold into WP_Screen
global $current_screen, $typenow;
if ( empty($screen) )
$screen = $current_screen;
elseif ( is_string($screen) )
$name = $screen;
$class = 'icon32';
if ( empty($name) ) {
if ( !empty($screen->parent_base) )
$name = $screen->parent_base;
else
$name = $screen->base;
if ( 'edit' == $name && isset($screen->post_type) && 'page' == $screen->post_type )
$name = 'edit-pages';
$post_type = '';
if ( isset( $screen->post_type ) )
$post_type = $screen->post_type;
elseif ( $current_screen == $screen )
$post_type = $typenow;
if ( $post_type )
$class .= ' ' . sanitize_html_class( 'icon32-posts-' . $post_type );
}
return '
';
}
/**
* 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 string $id Screen id, optional.
*/
function set_current_screen( $id = '' ) {
global $current_screen;
if ( is_a( $current_screen, 'WP_Screen' ) )
return;
$current_screen = new WP_Screen( $id );
// why do we need this? $current_screen = apply_filters('current_screen', $current_screen);
}
/**
* A class representing the current 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'.
*
* @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 the screen, if any.
*
* @since 3.3.0
* @var string
* @access private
*/
private $_help_sidebar = '';
/**
* The screen options associated with the screen, if any.
*
* @since 3.3.0
* @var array
* @access private
*/
private $_options = array(
'_context' => '',
'_screen_settings' => ''
);
/**
* Show screen options if any.
*
* @since 3.3.0
* @var bool
* @access private
*/
private $_show_options = false;
/**
* Stores the 'screen_settings' section of screen options.
*
* @since 3.3.0
* @var string
* @access private
*/
private $_screen_settings = '';
/**
* Constructor
*
* @since 3.3.0
*
* @param string $id A screen id. If empty, the $hook_suffix global is used to derive the ID.
*/
public function __construct( $id = '' ) {
global $hook_suffix, $typenow, $taxnow;
$action = '';
if ( empty( $id ) ) {
$screen = $hook_suffix;
$screen = str_replace('.php', '', $screen);
if ( preg_match('/-add|-new$/', $screen) )
$action = 'add';
$screen = str_replace('-new', '', $screen);
$screen = str_replace('-add', '', $screen);
$this->id = $this->base = $screen;
} else {
$id = sanitize_key( $id );
if ( false !== strpos($id, '-') ) {
list( $id, $typenow ) = explode('-', $id, 2);
if ( taxonomy_exists( $typenow ) ) {
$id = 'edit-tags';
$taxnow = $typenow;
$typenow = '';
}
}
$this->id = $this->base = $id;
}
$this->action = $action;
// Map index to dashboard
if ( 'index' == $this->base )
$this->base = 'dashboard';
if ( 'index' == $this->id )
$this->id = 'dashboard';
if ( 'edit' == $this->id ) {
if ( empty($typenow) )
$typenow = 'post';
$this->id .= '-' . $typenow;
$this->post_type = $typenow;
} elseif ( 'post' == $this->id ) {
if ( empty($typenow) )
$typenow = 'post';
$this->id = $typenow;
$this->post_type = $typenow;
} elseif ( 'edit-tags' == $this->id ) {
if ( empty($taxnow) )
$taxnow = 'post_tag';
$this->id = 'edit-' . $taxnow;
$this->taxonomy = $taxnow;
}
$this->is_network = is_network_admin();
$this->is_user = is_user_admin();
if ( $this->is_network ) {
$this->base .= '-network';
$this->id .= '-network';
} elseif ( $this->is_user ) {
$this->base .= '-user';
$this->id .= '-user';
}
}
/**
* 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;
$this->parent_base = preg_replace('/\?.*$/', '', $parent_file);
$this->parent_base = str_replace('.php', '', $this->parent_base);
}
/**
* Adds an option for the screen.
* Use the 'add_screen_help_and_options' action to add screen options.
*
* @since 3.3.0
*
* @param string $option Option ID
* @param mixed $args Associative array of arguments particular to the default $option or the HTML string to be printed in the Screen Options tab.
*/
public function add_option( $option = false, $args ) {
if ( is_array($args) && !empty($option) )
$this->_options[ $option ] = $args;
elseif ( is_string($args) )
$this->_options['_screen_settings'] .= $args;
$this->_show_options = true;
}
/**
* Adds option context.
* Use the 'add_screen_help_and_options' action to add it. Will not be shown if there aren't any screen options.
*
* @since 3.3.0
*
* @param string $text
*/
public function add_option_context( $text ) {
$this->_options['_context'] .= $text;
}
/**
* Add a help tab to the contextual help for the screen.
* Use the 'add_screen_help_and_options' action to add contextual help tabs.
*
* @since 3.3.0
*
* @param array $args
* - string - title - Title for the tab.
* - string - id - Tab ID.
* - string - section - Section title for the tab. Optional.
* - 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,
'section' => false,
'content' => '',
'callback' => false
);
$args = wp_parse_args( $args, $defaults );
// Ensure we have title and ID.
if ( ! $args['title'] || ! $args['id'] )
return;
$this->_help_tabs[] = $args;
}
/**
* Add a sidebar to the contextual help for the screen.
* Use the 'add_screen_help_and_options' action to add a sidebar to the contextual help.
*
* @since 3.3.0
*
* @param string $content Sidebar content in plain text or HTML.
*/
public function add_help_sidebar( $content ) {
if ( empty($this->_help_sidebar) ) // add only one
$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() {
global $_wp_contextual_help;
do_action('add_screen_help_and_options');
// Call old contextual_help_list filter.
if ( ! isset( $_wp_contextual_help ) )
$_wp_contextual_help = array();
// why are we filtering a global? $_wp_contextual_help = apply_filters( 'contextual_help_list', $_wp_contextual_help, $this );
if ( isset( $_wp_contextual_help[ $this->id ] ) ) {
// Call old contextual_help filter.
// why are we filtering the same global second time??
$contextual_help = apply_filters( 'contextual_help', $_wp_contextual_help[ $this->id ], $this->id, $this );
$this->add_help_tab( array(
'title' => __('Screen Info'),
'id' => 'screen-info',
'content' => $_wp_contextual_help[ $this->id ]
) );
}
// Time to render!
?>
" class="help-tab-content">
' . esc_html( $tab['section'] ) . '';
// Print tab content.
echo $tab['content'];
// If it exists, fire tab callback.
if ( ! empty( $tab['callback'] ) )
call_user_func( $tab['callback'], $this );
?>
_options['_screen_settings'];
// Default screen_settings for various screens.
// TODO: should probably be set on these screens, not here.
switch ( $this->id ) {
case 'widgets':
$screen_settings .= '