WordPress/wp-admin/includes/screen.php
2011-10-12 16:24:55 +00:00

937 lines
26 KiB
PHP

<?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 ) {
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|object $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' );
}
/**
* {@internal Missing Short Description}}
*
* @since 2.7.0
*
* @param unknown_type $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|object $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}" );
// 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;
}
/**
* {@internal Missing Short Description}}
*
* @since 2.7.0
*/
function favorite_actions( $screen = null ) {
$default_action = false;
if ( is_string($screen) )
$screen = convert_to_screen($screen);
if ( $screen->is_user )
return;
if ( isset($screen->post_type) ) {
$post_type_object = get_post_type_object($screen->post_type);
if ( 'add' != $screen->action )
$default_action = array('post-new.php?post_type=' . $post_type_object->name => array($post_type_object->labels->new_item, $post_type_object->cap->edit_posts));
else
$default_action = array('edit.php?post_type=' . $post_type_object->name => array($post_type_object->labels->name, $post_type_object->cap->edit_posts));
}
if ( !$default_action ) {
if ( $screen->is_network ) {
$default_action = array('sites.php' => array( __('Sites'), 'manage_sites'));
} else {
switch ( $screen->id ) {
case 'upload':
$default_action = array('media-new.php' => array(__('New Media'), 'upload_files'));
break;
case 'media':
$default_action = array('upload.php' => array(__('Edit Media'), 'upload_files'));
break;
case 'link-manager':
case 'link':
if ( 'add' != $screen->action )
$default_action = array('link-add.php' => array(__('New Link'), 'manage_links'));
else
$default_action = array('link-manager.php' => array(__('Edit Links'), 'manage_links'));
break;
case 'users':
$default_action = array('user-new.php' => array(__('New User'), 'create_users'));
break;
case 'user':
$default_action = array('users.php' => array(__('Edit Users'), 'edit_users'));
break;
case 'plugins':
$default_action = array('plugin-install.php' => array(__('Install Plugins'), 'install_plugins'));
break;
case 'plugin-install':
$default_action = array('plugins.php' => array(__('Manage Plugins'), 'activate_plugins'));
break;
case 'themes':
$default_action = array('theme-install.php' => array(__('Install Themes'), 'install_themes'));
break;
case 'theme-install':
$default_action = array('themes.php' => array(__('Manage Themes'), 'switch_themes'));
break;
default:
$default_action = array('post-new.php' => array(__('New Post'), 'edit_posts'));
break;
}
}
}
if ( !$screen->is_network ) {
$actions = array(
'post-new.php' => array(__('New Post'), 'edit_posts'),
'edit.php?post_status=draft' => array(__('Drafts'), 'edit_posts'),
'post-new.php?post_type=page' => array(__('New Page'), 'edit_pages'),
'media-new.php' => array(__('Upload'), 'upload_files'),
'edit-comments.php' => array(__('Comments'), 'moderate_comments')
);
} else {
$actions = array(
'sites.php' => array( __('Sites'), 'manage_sites'),
'users.php' => array( __('Users'), 'manage_network_users')
);
}
$default_key = array_keys($default_action);
$default_key = $default_key[0];
if ( isset($actions[$default_key]) )
unset($actions[$default_key]);
$actions = array_merge($default_action, $actions);
$actions = apply_filters( 'favorite_actions', $actions, $screen );
$allowed_actions = array();
foreach ( $actions as $action => $data ) {
if ( current_user_can($data[1]) )
$allowed_actions[$action] = $data[0];
}
if ( empty($allowed_actions) )
return;
$first = array_keys($allowed_actions);
$first = $first[0];
echo '<div id="favorite-actions">';
echo '<div id="favorite-first"><a href="' . $first . '">' . $allowed_actions[$first] . '</a></div><div id="favorite-toggle"><br /></div>';
echo '<div id="favorite-inside">';
array_shift($allowed_actions);
foreach ( $allowed_actions as $action => $label) {
echo "<div class='favorite-action'><a href='$action'>";
echo $label;
echo "</a></div>\n";
}
echo "</div></div>\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 ) {
$screen = str_replace( array('.php', '-new', '-add', '-network', '-user' ), '', $screen);
if ( is_network_admin() )
$screen .= '-network';
elseif ( is_user_admin() )
$screen .= '-user';
$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.
*
* @todo: deprecate?
*/
function add_contextual_help( $screen, $help ) {
if ( is_string( $screen ) )
$screen = convert_to_screen( $screen );
WP_Screen::add_old_compat_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() ) {
$current_screen = get_current_screen();
if ( ! $current_screen )
return;
return $current_screen->add_option( $option, $args );
}
function screen_icon( $screen = '' ) {
echo get_screen_icon( $screen );
}
function get_screen_icon( $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 '<div id="icon-' . esc_attr( $name ) . '" 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 string $id Screen id, optional.
*/
function set_current_screen( $id = '' ) {
global $current_screen;
$current_screen = new WP_Screen( $id );
$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 static $_help_tabs = array();
/**
* The help sidebar data associated with screens, if any.
*
* @since 3.3.0
* @var string
* @access private
*/
private static $_help_sidebar = array();
/**
* Stores old string-based help.
*/
private static $_old_compat_help = array();
/**
* The screen options associated with screens, if any.
*
* @since 3.3.0
* @var array
* @access private
*/
private static $_options = 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;
/**
* 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';
$this->id .= '-user';
}
if ( ! isset( self::$_help_tabs[ $this->id ] ) )
self::$_help_tabs[ $this->id ] = array();
if ( ! isset( self::$_help_sidebar[ $this->id ] ) )
self::$_help_sidebar[ $this->id ] = '';
if ( ! isset( self::$_options[ $this->id ] ) )
self::$_options[ $this->id ] = array();
}
static function add_old_compat_help( $screen, $help ) {
self::$_old_compat_help[ $screen ] = $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;
$this->parent_base = preg_replace('/\?.*$/', '', $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, $args = array() ) {
self::$_options[ $this->id ][ $option ] = $args;
}
/**
* Gets the arguments for an option for the screen.
*
* @since 3.3.0
*
* @param string
*/
public function get_option( $option, $key = false ) {
if ( ! isset( self::$_options[ $this->id ][ $option ] ) )
return null;
if ( $key ) {
if ( isset( self::$_options[ $this->id ][ $option ][ $key ] ) )
return self::$_options[ $this->id ][ $option ][ $key ];
return null;
}
return self::$_options[ $this->id ][ $option ];
}
/**
* Add a help tab 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 contextual help tabs.
*
* @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'] || ! $args['title'] )
return;
self::$_help_tabs[ $this->id ][] = $args;
}
/**
* 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 add_help_sidebar( $content ) {
self::$_help_sidebar[ $this->id ] = $content;
}
/**
* Render the screen's help section.
*
* This will trigger the deprecated filters for backwards compatibility.
*
* @since 3.3.0
*/
public function render_screen_meta() {
// Call old contextual_help_list filter.
self::$_old_compat_help = apply_filters( 'contextual_help_list', self::$_old_compat_help, $this );
if ( isset( self::$_old_compat_help[ $this->id ] ) || empty(self::$_help_tabs[ $this->id ] ) ) {
// Call old contextual_help filter.
if ( isset( self::$_old_compat_help[ $this->id ] ) )
$contextual_help = apply_filters( 'contextual_help', self::$_old_compat_help[ $this->id ], $this->id, $this );
if ( empty( $contextual_help ) ) {
$default_help = __( '<a href="http://codex.wordpress.org/" target="_blank">Documentation</a>' );
$default_help .= '<br />';
$default_help .= __( '<a href="http://wordpress.org/support/" target="_blank">Support Forums</a>' );
$contextual_help = '<p>' . apply_filters( 'default_contextual_help', $default_help ) . '</p>';
}
$this->add_help_tab( array(
'id' => 'contextual-help',
'title' => __('Screen Info'),
'content' => $contextual_help,
) );
}
// Add screen options tab
if ( $this->show_screen_options() ) {
$this->add_help_tab( array(
'id' => 'screen-options',
'title' => __('Screen Options'),
'callback' => array( $this, 'render_screen_options' ),
) );
$_options_tab = array_pop( self::$_help_tabs[ $this->id ] );
array_unshift( self::$_help_tabs[ $this->id ], $_options_tab );
}
// Time to render!
?>
<div id="screen-meta" class='metabox-prefs'>
<div id="contextual-help-back"></div>
<div id="contextual-help-wrap" class="hidden">
<div class="contextual-help-tabs">
<ul>
<?php foreach ( self::$_help_tabs[ $this->id ] 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( $tab['title'] ); ?>
</a>
</li>
<?php endforeach; ?>
</ul>
</div>
<?php if ( ! empty( self::$_help_sidebar[ $this->id ] ) ) : ?>
<div class="contextual-help-sidebar">
<?php echo self::$_help_sidebar[ $this->id ]; ?>
</div>
<?php endif; ?>
<div class="contextual-help-tabs-wrap">
<?php foreach ( self::$_help_tabs[ $this->id ] 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( $tab['callback'], $this );
?>
</div>
<?php endforeach; ?>
</div>
</div>
</div>
<?php
}
public function show_screen_options() {
global $wp_meta_boxes, $wp_list_table;
if ( is_bool( $this->_show_screen_options ) )
return $this->_show_screen_options;
$columns = get_column_headers( $this );
$show_screen = false;
if ( ! empty( $wp_meta_boxes[ $this->id ] ) || ! empty( $columns ) )
$show_screen = true;
// Check if there are per-page options.
$show_screen = $show_screen || $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";
$show_screen = true;
break;
}
if ( ! empty( $this->_screen_settings ) )
$show_screen = true;
if ( ! empty( self::$_options[ $this->id ] ) )
$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 );
?>
<form id="adv-settings" action="" method="post">
<?php
if ( $this->get_option('overview') )
echo $this->get_option('overview');
if ( isset( $wp_meta_boxes[ $this->id ] ) ) : ?>
<h5><?php _ex('Show on screen', 'Metaboxes') ?></h5>
<div class="metabox-prefs">
<?php meta_box_prefs( $this ); ?>
<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>
<?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
}
}