WordPress/wp-admin/includes/screen.php

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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|object $screen The screen you want the headers for
* @return array Containing the headers in the format id => UI String
*/
function get_column_headers( $screen ) { // TODO: fold into WP_Screen?
if ( is_string( $screen ) )
$screen = convert_to_screen( $screen );
global $_wp_column_headers;
if ( !isset( $_wp_column_headers[ $screen->id ] ) ) {
$_wp_column_headers[ $screen->id ] = apply_filters( 'manage_' . $screen->id . '_columns', array() );
}
return $_wp_column_headers[ $screen->id ];
}
/**
* Get a list of hidden columns.
*
* @since 2.7.0
*
* @param string|object $screen The screen you want the hidden columns for
* @return array
*/
function get_hidden_columns( $screen ) { // TODO: fold into WP_Screen
if ( is_string( $screen ) )
$screen = convert_to_screen( $screen );
return (array) get_user_option( 'manage' . $screen->id . 'columnshidden' );
}
/**
* Get Hidden Meta Boxes
*
* @since 2.7.0
*
* @param string|object $screen Screen identifier
* @return array Hidden Meta Boxes
*/
function get_hidden_meta_boxes( $screen ) { // TODO: fold into WP_Screen
if ( is_string( $screen ) )
$screen = convert_to_screen( $screen );
$hidden = get_user_option( "metaboxhidden_{$screen->id}" );
// Hide slug boxes by default
if ( !is_array( $hidden ) ) {
if ( 'post' == $screen->base || 'page' == $screen->base )
$hidden = array('slugdiv', 'trackbacksdiv', 'postcustom', 'postexcerpt', 'commentstatusdiv', 'commentsdiv', 'authordiv', 'revisionsdiv');
else
$hidden = array( 'slugdiv' );
$hidden = apply_filters('default_hidden_meta_boxes', $hidden, $screen);
}
return $hidden;
}
/**
* 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;
}
function screen_icon( $for = '' ) { // TODO: fold into WP_Screen?
global $current_screen;
if ( !isset($current_screen) )
return;
echo $current_screen->get_screen_icon( $for );
}
/**
* 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' ) )
$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;
/**
* 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, $args = null ) {
if ( is_array($args) && !empty($option) )
$this->_options[ $option ] = $args;
elseif ( is_string($option) )
$this->_options['_screen_settings'] .= $option;
else
return false;
$this->_show_options = true;
return 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 false;
$this->_help_tabs[] = $args;
return true;
}
/**
* 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;
// Intended for adding Help and Screen Options.
do_action('add_screen_help_and_options', $this);
// 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!
?>
<div id="screen-meta" class='metabox-prefs'>
<div id="contextual-help-wrap" class="hidden">
<div class="contextual-help-tabs">
<ul>
<?php
if ( $this->_show_options ) {
$class = true;
?>
<li id="tab-link-screen-options" class="active">
<a href="#tab-panel-screen-options">
<?php _e('Screen Options'); ?>
</a>
</li>
<?php
}
foreach ( $this->_help_tabs as $i => $tab ) {
$id = esc_attr($tab['id']);
$class = empty($class) && $i == 0 ? ' class="active"' : '';
?>
<li id="<?php echo "tab-link-$id"; ?>"<?php echo $class; ?>>
<a href="<?php echo "#tab-panel-$id"; ?>">
<?php echo esc_html( $tab['title'] ); ?>
</a>
</li>
<?php } ?>
</ul>
</div>
<?php
if ( $this->_help_sidebar )
echo '<div class="contextual-help-sidebar">' . $this->_help_sidebar . '</div>';
?>
<div class="contextual-help-tabs-wrap">
<?php
if ( $this->_show_options ) {
$class2 = true;
echo '<div id="tab-panel-screen-options" class="help-tab-content active">';
if ( !empty($this->_options['_context']) )
echo $this->_options['_context'];
$this->render_screen_options();
echo '</div>';
}
foreach ( $this->_help_tabs as $i => $tab ) {
$class2 = empty($class2) && $i == 0 ? ' active' : '';
?>
<div id="<?php echo esc_attr( "tab-panel-{$tab['id']}" ); ?>" class="help-tab-content<?php echo $class2; ?>">
<?php
if ( $tab['section'] )
echo '<h3>' . esc_html( $tab['section'] ) . '</h3>';
// Print tab content.
echo $tab['content'];
// If it exists, fire tab callback.
if ( ! empty( $tab['callback'] ) )
call_user_func( $tab['callback'], $this );
?>
</div>
<?php } ?>
</div>
</div>
</div>
<?php
}
/**
* Render the screen options tab.
*
* @since 3.3.0
*/
public function render_screen_options() {
$screen_settings = $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 .= '<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;
}
// TODO: deprecate
$screen_settings = apply_filters( 'screen_settings', $screen_settings, $this );
echo '<form id="adv-settings" action="" method="post">';
$this->render_table_columns_prefs();
$this->render_metabox_prefs();
$this->render_screen_layout();
$this->render_per_page_options();
echo $screen_settings;
wp_nonce_field( 'screen-options-nonce', 'screenoptionnonce', false );
echo '</form>';
}
/**
* Render the option for hiding table columns on the page
*
* @since 3.3.0
*/
function render_table_columns_prefs() {
$columns = get_column_headers( $this );
if ( ! empty( $columns ) ) {
$hidden = get_hidden_columns( $this );
?>
<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 }
}
/**
* Render the option for hiding metaboxes on the page
*
* @since 3.3.0
*/
function render_metabox_prefs() {
global $wp_meta_boxes;
if ( !empty( $wp_meta_boxes[ $this->id ] ) ) {
$hidden = get_hidden_meta_boxes($this);
?>
<h5><?php _ex('Show on screen', 'Metaboxes') ?></h5>
<div class="metabox-prefs">
<?php
foreach ( array_keys($wp_meta_boxes[$this->id]) as $context ) {
foreach ( array_keys($wp_meta_boxes[$this->id][$context]) as $priority ) {
foreach ( $wp_meta_boxes[$this->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";
}
}
}
?>
<br class="clear" />
</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()
// TODO: deprecate it
$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 ( ! isset( $this->_options['layout_columns'] ) ) {
$screen_layout_columns = 0;
return;
}
$screen_layout_columns = get_user_option("screen_layout_$this->id");
$num = $this->_options['layout_columns']['max'];
if ( ! $screen_layout_columns || 'auto' == $screen_layout_columns ) {
if ( isset( $this->_options['layout_columns']['default'] ) )
$screen_layout_columns = $this->_options['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 ( empty( $this->_options['per_page'] ) )
return;
$per_page_label = $this->_options['per_page']['label'];
if ( empty( $this->_options['per_page']['option'] ) ) {
$option = str_replace( '-', '_', "{$this->id}_per_page" );
} else {
$option = $this->_options['per_page']['option'];
}
$per_page = (int) get_user_option( $option );
if ( empty( $per_page ) || $per_page < 1 ) {
if ( isset($this->_options['per_page']['default']) )
$per_page = $this->_options['per_page']['default'];
else
$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
}
function get_screen_icon( $for = '' ) {
if ( !empty($for) && is_string($for) ) {
$name = $for;
} else {
if ( !empty($this->parent_base) )
$name = $this->parent_base;
else
$name = $this->base;
}
if ( 'edit' == $name && isset($this->post_type) && 'page' == $this->post_type )
$name = 'edit-pages';
$class = '';
if ( !empty( $this->post_type ) )
$class = ' ' . sanitize_html_class( 'icon32-posts-' . $this->post_type );
return '<div id="icon-' . esc_attr( $name ) . '" class="icon32' . $class . '"><br /></div>';
}
}