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<?php
/**
* WordPress Customize Widgets classes
*
* @package WordPress
* @subpackage Customize
* @since 3.9.0
*/
/**
* Customize Widgets class.
*
* Implements widget management in the Customizer.
*
* @since 3.9.0
*
* @see WP_Customize_Manager
*/
final class WP_Customize_Widgets {
/**
* WP_Customize_Manager instance.
*
* @since 3.9.0
* @access public
* @var WP_Customize_Manager
*/
public $manager;
/**
* All id_bases for widgets defined in core.
*
* @since 3.9.0
* @access protected
* @var array
*/
protected $core_widget_id_bases = array(
'archives', 'calendar', 'categories', 'links', 'meta',
'nav_menu', 'pages', 'recent-comments', 'recent-posts',
'rss', 'search', 'tag_cloud', 'text',
);
/**
* @since 3.9.0
* @access protected
* @var array
*/
protected $rendered_sidebars = array();
/**
* @since 3.9.0
* @access protected
* @var array
*/
protected $rendered_widgets = array();
/**
* @since 3.9.0
* @access protected
* @var array
*/
protected $old_sidebars_widgets = array();
/**
* Mapping of setting type to setting ID pattern.
*
* @since 4.2.0
* @access protected
* @var array
*/
protected $setting_id_patterns = array(
'widget_instance' => '/^(widget_.+?)(?:\[(\d+)\])?$/',
'sidebar_widgets' => '/^sidebars_widgets\[(.+?)\]$/',
);
/**
* Initial loader.
*
* @since 3.9.0
* @access public
*
* @param WP_Customize_Manager $manager Customize manager bootstrap instance.
*/
public function __construct( $manager ) {
$this->manager = $manager;
add_filter( 'customize_dynamic_setting_args', array( $this, 'filter_customize_dynamic_setting_args' ), 10, 2 );
add_action( 'after_setup_theme', array( $this, 'register_settings' ) );
add_action( 'wp_loaded', array( $this, 'override_sidebars_widgets_for_theme_switch' ) );
add_action( 'customize_controls_init', array( $this, 'customize_controls_init' ) );
add_action( 'customize_register', array( $this, 'schedule_customize_register' ), 1 );
add_action( 'customize_controls_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
add_action( 'customize_controls_print_styles', array( $this, 'print_styles' ) );
add_action( 'customize_controls_print_scripts', array( $this, 'print_scripts' ) );
add_action( 'customize_controls_print_footer_scripts', array( $this, 'print_footer_scripts' ) );
add_action( 'customize_controls_print_footer_scripts', array( $this, 'output_widget_control_templates' ) );
add_action( 'customize_preview_init', array( $this, 'customize_preview_init' ) );
add_filter( 'customize_refresh_nonces', array( $this, 'refresh_nonces' ) );
add_action( 'dynamic_sidebar', array( $this, 'tally_rendered_widgets' ) );
add_filter( 'is_active_sidebar', array( $this, 'tally_sidebars_via_is_active_sidebar_calls' ), 10, 2 );
add_filter( 'dynamic_sidebar_has_widgets', array( $this, 'tally_sidebars_via_dynamic_sidebar_calls' ), 10, 2 );
}
/**
* Get the widget setting type given a setting ID.
*
* @since 4.2.0
* @access protected
*
* @param $setting_id Setting ID.
* @return string|null Setting type. Null otherwise.
*/
protected function get_setting_type( $setting_id ) {
static $cache = array();
if ( isset( $cache[ $setting_id ] ) ) {
return $cache[ $setting_id ];
}
foreach ( $this->setting_id_patterns as $type => $pattern ) {
if ( preg_match( $pattern, $setting_id ) ) {
$cache[ $setting_id ] = $type;
return $type;
}
}
return null;
}
/**
* Inspect the incoming customized data for any widget settings, and dynamically add them up-front so widgets will be initialized properly.
*
* @since 4.2.0
* @access public
*/
public function register_settings() {
$widget_setting_ids = array();
$incoming_setting_ids = array_keys( $this->manager->unsanitized_post_values() );
foreach ( $incoming_setting_ids as $setting_id ) {
if ( ! is_null( $this->get_setting_type( $setting_id ) ) ) {
$widget_setting_ids[] = $setting_id;
}
}
if ( $this->manager->doing_ajax( 'update-widget' ) && isset( $_REQUEST['widget-id'] ) ) {
$widget_setting_ids[] = $this->get_setting_id( wp_unslash( $_REQUEST['widget-id'] ) );
}
$settings = $this->manager->add_dynamic_settings( array_unique( $widget_setting_ids ) );
/*
* Preview settings right away so that widgets and sidebars will get registered properly.
* But don't do this if a customize_save because this will cause WP to think there is nothing
* changed that needs to be saved.
*/
if ( ! $this->manager->doing_ajax( 'customize_save' ) ) {
foreach ( $settings as $setting ) {
$setting->preview();
}
}
}
/**
* Determine the arguments for a dynamically-created setting.
*
* @since 4.2.0
* @access public
*
* @param false|array $setting_args The arguments to the WP_Customize_Setting constructor.
* @param string $setting_id ID for dynamic setting, usually coming from `$_POST['customized']`.
* @return false|array Setting arguments, false otherwise.
*/
public function filter_customize_dynamic_setting_args( $args, $setting_id ) {
if ( $this->get_setting_type( $setting_id ) ) {
$args = $this->get_setting_args( $setting_id );
}
return $args;
}
/**
* Get an unslashed post value or return a default.
*
* @since 3.9.0
*
* @access protected
*
* @param string $name Post value.
* @param mixed $default Default post value.
* @return mixed Unslashed post value or default value.
*/
protected function get_post_value( $name, $default = null ) {
if ( ! isset( $_POST[ $name ] ) ) {
return $default;
}
return wp_unslash( $_POST[ $name ] );
}
/**
* Override sidebars_widgets for theme switch.
*
* When switching a theme via the Customizer, supply any previously-configured
* sidebars_widgets from the target theme as the initial sidebars_widgets
* setting. Also store the old theme's existing settings so that they can
* be passed along for storing in the sidebars_widgets theme_mod when the
* theme gets switched.
*
* @since 3.9.0
* @access public
*/
public function override_sidebars_widgets_for_theme_switch() {
global $sidebars_widgets;
if ( $this->manager->doing_ajax() || $this->manager->is_theme_active() ) {
return;
}
$this->old_sidebars_widgets = wp_get_sidebars_widgets();
add_filter( 'customize_value_old_sidebars_widgets_data', array( $this, 'filter_customize_value_old_sidebars_widgets_data' ) );
// retrieve_widgets() looks at the global $sidebars_widgets
$sidebars_widgets = $this->old_sidebars_widgets;
$sidebars_widgets = retrieve_widgets( 'customize' );
add_filter( 'option_sidebars_widgets', array( $this, 'filter_option_sidebars_widgets_for_theme_switch' ), 1 );
unset( $GLOBALS['_wp_sidebars_widgets'] ); // reset global cache var used by wp_get_sidebars_widgets()
}
/**
* Filter old_sidebars_widgets_data Customizer setting.
*
* When switching themes, filter the Customizer setting
* old_sidebars_widgets_data to supply initial $sidebars_widgets before they
* were overridden by retrieve_widgets(). The value for
* old_sidebars_widgets_data gets set in the old theme's sidebars_widgets
* theme_mod.
*
* @see WP_Customize_Widgets::handle_theme_switch()
* @since 3.9.0
* @access public
*
* @param array $old_sidebars_widgets
*/
public function filter_customize_value_old_sidebars_widgets_data( $old_sidebars_widgets ) {
return $this->old_sidebars_widgets;
}
/**
* Filter sidebars_widgets option for theme switch.
*
* When switching themes, the retrieve_widgets() function is run when the
* Customizer initializes, and then the new sidebars_widgets here get
* supplied as the default value for the sidebars_widgets option.
*
* @see WP_Customize_Widgets::handle_theme_switch()
* @since 3.9.0
* @access public
*
* @param array $sidebars_widgets
*/
public function filter_option_sidebars_widgets_for_theme_switch( $sidebars_widgets ) {
$sidebars_widgets = $GLOBALS['sidebars_widgets'];
$sidebars_widgets['array_version'] = 3;
return $sidebars_widgets;
}
/**
* Make sure all widgets get loaded into the Customizer.
*
* Note: these actions are also fired in wp_ajax_update_widget().
*
* @since 3.9.0
* @access public
*/
public function customize_controls_init() {
/** This action is documented in wp-admin/includes/ajax-actions.php */
do_action( 'load-widgets.php' );
/** This action is documented in wp-admin/includes/ajax-actions.php */
do_action( 'widgets.php' );
/** This action is documented in wp-admin/widgets.php */
do_action( 'sidebar_admin_setup' );
}
/**
* Ensure widgets are available for all types of previews.
*
* When in preview, hook to 'customize_register' for settings
* after WordPress is loaded so that all filters have been
* initialized (e.g. Widget Visibility).
*
* @since 3.9.0
* @access public
*/
public function schedule_customize_register() {
if ( is_admin() ) {
$this->customize_register();
} else {
add_action( 'wp', array( $this, 'customize_register' ) );
}
}
/**
* Register Customizer settings and controls for all sidebars and widgets.
*
* @since 3.9.0
* @access public
*/
public function customize_register() {
global $wp_registered_widgets, $wp_registered_widget_controls, $wp_registered_sidebars;
$sidebars_widgets = array_merge(
array( 'wp_inactive_widgets' => array() ),
array_fill_keys( array_keys( $GLOBALS['wp_registered_sidebars'] ), array() ),
wp_get_sidebars_widgets()
);
$new_setting_ids = array();
/*
* Register a setting for all widgets, including those which are active,
* inactive, and orphaned since a widget may get suppressed from a sidebar
* via a plugin (like Widget Visibility).
*/
foreach ( array_keys( $wp_registered_widgets ) as $widget_id ) {
$setting_id = $this->get_setting_id( $widget_id );
$setting_args = $this->get_setting_args( $setting_id );
if ( ! $this->manager->get_setting( $setting_id ) ) {
$this->manager->add_setting( $setting_id, $setting_args );
}
$new_setting_ids[] = $setting_id;
}
/*
* Add a setting which will be supplied for the theme's sidebars_widgets
* theme_mod when the the theme is switched.
*/
if ( ! $this->manager->is_theme_active() ) {
$setting_id = 'old_sidebars_widgets_data';
$setting_args = $this->get_setting_args( $setting_id, array(
'type' => 'global_variable',
'dirty' => true,
) );
$this->manager->add_setting( $setting_id, $setting_args );
}
$this->manager->add_panel( 'widgets', array(
'title' => __( 'Widgets' ),
'description' => __( 'Widgets are independent sections of content that can be placed into widgetized areas provided by your theme (commonly called sidebars).' ),
'priority' => 110,
) );
foreach ( $sidebars_widgets as $sidebar_id => $sidebar_widget_ids ) {
if ( empty( $sidebar_widget_ids ) ) {
$sidebar_widget_ids = array();
}
$is_registered_sidebar = isset( $GLOBALS['wp_registered_sidebars'][$sidebar_id] );
$is_inactive_widgets = ( 'wp_inactive_widgets' === $sidebar_id );
$is_active_sidebar = ( $is_registered_sidebar && ! $is_inactive_widgets );
// Add setting for managing the sidebar's widgets.
if ( $is_registered_sidebar || $is_inactive_widgets ) {
$setting_id = sprintf( 'sidebars_widgets[%s]', $sidebar_id );
$setting_args = $this->get_setting_args( $setting_id );
if ( ! $this->manager->get_setting( $setting_id ) ) {
if ( ! $this->manager->is_theme_active() ) {
$setting_args['dirty'] = true;
}
$this->manager->add_setting( $setting_id, $setting_args );
}
$new_setting_ids[] = $setting_id;
// Add section to contain controls.
$section_id = sprintf( 'sidebar-widgets-%s', $sidebar_id );
if ( $is_active_sidebar ) {
$section_args = array(
'title' => $GLOBALS['wp_registered_sidebars'][ $sidebar_id ]['name'],
'description' => $GLOBALS['wp_registered_sidebars'][ $sidebar_id ]['description'],
'priority' => array_search( $sidebar_id, array_keys( $wp_registered_sidebars ) ),
'panel' => 'widgets',
'sidebar_id' => $sidebar_id,
);
/**
* Filter Customizer widget section arguments for a given sidebar.
*
* @since 3.9.0
*
* @param array $section_args Array of Customizer widget section arguments.
* @param string $section_id Customizer section ID.
* @param int|string $sidebar_id Sidebar ID.
*/
$section_args = apply_filters( 'customizer_widgets_section_args', $section_args, $section_id, $sidebar_id );
$section = new WP_Customize_Sidebar_Section( $this->manager, $section_id, $section_args );
$this->manager->add_section( $section );
$control = new WP_Widget_Area_Customize_Control( $this->manager, $setting_id, array(
'section' => $section_id,
'sidebar_id' => $sidebar_id,
'priority' => count( $sidebar_widget_ids ), // place 'Add Widget' and 'Reorder' buttons at end.
) );
$new_setting_ids[] = $setting_id;
$this->manager->add_control( $control );
}
}
// Add a control for each active widget (located in a sidebar).
foreach ( $sidebar_widget_ids as $i => $widget_id ) {
// Skip widgets that may have gone away due to a plugin being deactivated.
if ( ! $is_active_sidebar || ! isset( $GLOBALS['wp_registered_widgets'][$widget_id] ) ) {
continue;
}
$registered_widget = $GLOBALS['wp_registered_widgets'][$widget_id];
$setting_id = $this->get_setting_id( $widget_id );
$id_base = $GLOBALS['wp_registered_widget_controls'][$widget_id]['id_base'];
$control = new WP_Widget_Form_Customize_Control( $this->manager, $setting_id, array(
'label' => $registered_widget['name'],
'section' => $section_id,
'sidebar_id' => $sidebar_id,
'widget_id' => $widget_id,
'widget_id_base' => $id_base,
'priority' => $i,
'width' => $wp_registered_widget_controls[$widget_id]['width'],
'height' => $wp_registered_widget_controls[$widget_id]['height'],
'is_wide' => $this->is_wide_widget( $widget_id ),
) );
$this->manager->add_control( $control );
}
}
if ( ! $this->manager->doing_ajax( 'customize_save' ) ) {
foreach ( $new_setting_ids as $new_setting_id ) {
$this->manager->get_setting( $new_setting_id )->preview();
}
}
add_filter( 'sidebars_widgets', array( $this, 'preview_sidebars_widgets' ), 1 );
}
/**
* Covert a widget_id into its corresponding Customizer setting ID (option name).
*
* @since 3.9.0
* @access public
*
* @param string $widget_id Widget ID.
* @return string Maybe-parsed widget ID.
*/
public function get_setting_id( $widget_id ) {
$parsed_widget_id = $this->parse_widget_id( $widget_id );
$setting_id = sprintf( 'widget_%s', $parsed_widget_id['id_base'] );
if ( ! is_null( $parsed_widget_id['number'] ) ) {
$setting_id .= sprintf( '[%d]', $parsed_widget_id['number'] );
}
return $setting_id;
}
/**
* Determine whether the widget is considered "wide".
*
* Core widgets which may have controls wider than 250, but can
* still be shown in the narrow Customizer panel. The RSS and Text
* widgets in Core, for example, have widths of 400 and yet they
* still render fine in the Customizer panel. This method will
* return all Core widgets as being not wide, but this can be
* overridden with the is_wide_widget_in_customizer filter.
*
* @since 3.9.0
* @access public
*
* @param string $widget_id Widget ID.
* @return bool Whether or not the widget is a "wide" widget.
*/
public function is_wide_widget( $widget_id ) {
global $wp_registered_widget_controls;
$parsed_widget_id = $this->parse_widget_id( $widget_id );
$width = $wp_registered_widget_controls[$widget_id]['width'];
$is_core = in_array( $parsed_widget_id['id_base'], $this->core_widget_id_bases );
$is_wide = ( $width > 250 && ! $is_core );
/**
* Filter whether the given widget is considered "wide".
*
* @since 3.9.0
*
* @param bool $is_wide Whether the widget is wide, Default false.
* @param string $widget_id Widget ID.
*/
return apply_filters( 'is_wide_widget_in_customizer', $is_wide, $widget_id );
}
/**
* Covert a widget ID into its id_base and number components.
*
* @since 3.9.0
* @access public
*
* @param string $widget_id Widget ID.
* @return array Array containing a widget's id_base and number components.
*/
public function parse_widget_id( $widget_id ) {
$parsed = array(
'number' => null,
'id_base' => null,
);
if ( preg_match( '/^(.+)-(\d+)$/', $widget_id, $matches ) ) {
$parsed['id_base'] = $matches[1];
$parsed['number'] = intval( $matches[2] );
} else {
// likely an old single widget
$parsed['id_base'] = $widget_id;
}
return $parsed;
}
/**
* Convert a widget setting ID (option path) to its id_base and number components.
*
* @since 3.9.0
* @access public
*
* @param string $setting_id Widget setting ID.
* @return WP_Error|array Array containing a widget's id_base and number components,
* or a WP_Error object.
*/
public function parse_widget_setting_id( $setting_id ) {
if ( ! preg_match( '/^(widget_(.+?))(?:\[(\d+)\])?$/', $setting_id, $matches ) ) {
return new WP_Error( 'widget_setting_invalid_id' );
}
$id_base = $matches[2];
$number = isset( $matches[3] ) ? intval( $matches[3] ) : null;
return compact( 'id_base', 'number' );
}
/**
* Call admin_print_styles-widgets.php and admin_print_styles hooks to
* allow custom styles from plugins.
*
* @since 3.9.0
* @access public
*/
public function print_styles() {
/** This action is documented in wp-admin/admin-header.php */
do_action( 'admin_print_styles-widgets.php' );
/** This action is documented in wp-admin/admin-header.php */
do_action( 'admin_print_styles' );
}
/**
* Call admin_print_scripts-widgets.php and admin_print_scripts hooks to
* allow custom scripts from plugins.
*
* @since 3.9.0
* @access public
*/
public function print_scripts() {
/** This action is documented in wp-admin/admin-header.php */
do_action( 'admin_print_scripts-widgets.php' );
/** This action is documented in wp-admin/admin-header.php */
do_action( 'admin_print_scripts' );
}
/**
* Enqueue scripts and styles for Customizer panel and export data to JavaScript.
*
* @since 3.9.0
* @access public
*/
public function enqueue_scripts() {
wp_enqueue_style( 'customize-widgets' );
wp_enqueue_script( 'customize-widgets' );
/** This action is documented in wp-admin/admin-header.php */
do_action( 'admin_enqueue_scripts', 'widgets.php' );
/*
* Export available widgets with control_tpl removed from model
* since plugins need templates to be in the DOM.
*/
$available_widgets = array();
foreach ( $this->get_available_widgets() as $available_widget ) {
unset( $available_widget['control_tpl'] );
$available_widgets[] = $available_widget;
}
$widget_reorder_nav_tpl = sprintf(
'<div class="widget-reorder-nav"><span class="move-widget" tabindex="0">%1$s</span><span class="move-widget-down" tabindex="0">%2$s</span><span class="move-widget-up" tabindex="0">%3$s</span></div>',
__( 'Move to another area…' ),
__( 'Move down' ),
__( 'Move up' )
);
$move_widget_area_tpl = str_replace(
array( '{description}', '{btn}' ),
array(
__( 'Select an area to move this widget into:' ),
_x( 'Move', 'Move widget' ),
),
'<div class="move-widget-area">
<p class="description">{description}</p>
<ul class="widget-area-select">
<% _.each( sidebars, function ( sidebar ){ %>
<li class="" data-id="<%- sidebar.id %>" title="<%- sidebar.description %>" tabindex="0"><%- sidebar.name %></li>
<% }); %>
</ul>
<div class="move-widget-actions">
<button class="move-widget-btn button-secondary" type="button">{btn}</button>
</div>
</div>'
);
global $wp_scripts;
$settings = array(
'nonce' => wp_create_nonce( 'update-widget' ),
'registeredSidebars' => array_values( $GLOBALS['wp_registered_sidebars'] ),
'registeredWidgets' => $GLOBALS['wp_registered_widgets'],
'availableWidgets' => $available_widgets, // @todo Merge this with registered_widgets
'l10n' => array(
'saveBtnLabel' => __( 'Apply' ),
'saveBtnTooltip' => __( 'Save and preview changes before publishing them.' ),
'removeBtnLabel' => __( 'Remove' ),
'removeBtnTooltip' => __( 'Trash widget by moving it to the inactive widgets sidebar.' ),
'error' => __( 'An error has occurred. Please reload the page and try again.' ),
'widgetMovedUp' => __( 'Widget moved up' ),
'widgetMovedDown' => __( 'Widget moved down' ),
),
'tpl' => array(
'widgetReorderNav' => $widget_reorder_nav_tpl,
'moveWidgetArea' => $move_widget_area_tpl,
),
);
foreach ( $settings['registeredWidgets'] as &$registered_widget ) {
unset( $registered_widget['callback'] ); // may not be JSON-serializeable
}
$wp_scripts->add_data(
'customize-widgets',
'data',
sprintf( 'var _wpCustomizeWidgetsSettings = %s;', wp_json_encode( $settings ) )
);
}
/**
* Render the widget form control templates into the DOM.
*
* @since 3.9.0
* @access public
*/
public function output_widget_control_templates() {
?>
<div id="widgets-left"><!-- compatibility with JS which looks for widget templates here -->
<div id="available-widgets">
<div id="available-widgets-filter">
<label class="screen-reader-text" for="widgets-search"><?php _e( 'Search Widgets' ); ?></label>
<input type="search" id="widgets-search" placeholder="<?php esc_attr_e( 'Search widgets…' ) ?>" />
</div>
<div id="available-widgets-list">
<?php foreach ( $this->get_available_widgets() as $available_widget ): ?>
<div id="widget-tpl-<?php echo esc_attr( $available_widget['id'] ) ?>" data-widget-id="<?php echo esc_attr( $available_widget['id'] ) ?>" class="widget-tpl <?php echo esc_attr( $available_widget['id'] ) ?>" tabindex="0">
<?php echo $available_widget['control_tpl']; ?>
</div>
<?php endforeach; ?>
</div><!-- #available-widgets-list -->
</div><!-- #available-widgets -->
</div><!-- #widgets-left -->
<?php
}
/**
* Call admin_print_footer_scripts and admin_print_scripts hooks to
* allow custom scripts from plugins.
*
* @since 3.9.0
* @access public
*/
public function print_footer_scripts() {
/** This action is documented in wp-admin/admin-footer.php */
do_action( 'admin_print_footer_scripts' );
/** This action is documented in wp-admin/admin-footer.php */
do_action( 'admin_footer-widgets.php' );
}
/**
* Get common arguments to supply when constructing a Customizer setting.
*
* @since 3.9.0
* @access public
*
* @param string $id Widget setting ID.
* @param array $overrides Array of setting overrides.
* @return array Possibly modified setting arguments.
*/
public function get_setting_args( $id, $overrides = array() ) {
$args = array(
'type' => 'option',
'capability' => 'edit_theme_options',
'transport' => 'refresh',
'default' => array(),
);
if ( preg_match( $this->setting_id_patterns['sidebar_widgets'], $id, $matches ) ) {
$args['sanitize_callback'] = array( $this, 'sanitize_sidebar_widgets' );
$args['sanitize_js_callback'] = array( $this, 'sanitize_sidebar_widgets_js_instance' );
} else if ( preg_match( $this->setting_id_patterns['widget_instance'], $id, $matches ) ) {
$args['sanitize_callback'] = array( $this, 'sanitize_widget_instance' );
$args['sanitize_js_callback'] = array( $this, 'sanitize_widget_js_instance' );
}
$args = array_merge( $args, $overrides );
/**
* Filter the common arguments supplied when constructing a Customizer setting.
*
* @since 3.9.0
*
* @see WP_Customize_Setting
*
* @param array $args Array of Customizer setting arguments.
* @param string $id Widget setting ID.
*/
return apply_filters( 'widget_customizer_setting_args', $args, $id );
}
/**
* Make sure that sidebar widget arrays only ever contain widget IDS.
*
* Used as the 'sanitize_callback' for each $sidebars_widgets setting.
*
* @since 3.9.0
* @access public
*
* @param array $widget_ids Array of widget IDs.
* @return array Array of sanitized widget IDs.
*/
public function sanitize_sidebar_widgets( $widget_ids ) {
$widget_ids = array_map( 'strval', (array) $widget_ids );
$sanitized_widget_ids = array();
foreach ( $widget_ids as $widget_id ) {
$sanitized_widget_ids[] = preg_replace( '/[^a-z0-9_\-]/', '', $widget_id );
}
return $sanitized_widget_ids;
}
/**
* Build up an index of all available widgets for use in Backbone models.
*
* @since 3.9.0
* @access public
*
* @see wp_list_widgets()
*
* @return array List of available widgets.
*/
public function get_available_widgets() {
static $available_widgets = array();
if ( ! empty( $available_widgets ) ) {
return $available_widgets;
}
global $wp_registered_widgets, $wp_registered_widget_controls;
require_once ABSPATH . '/wp-admin/includes/widgets.php'; // for next_widget_id_number()
$sort = $wp_registered_widgets;
usort( $sort, array( $this, '_sort_name_callback' ) );
$done = array();
foreach ( $sort as $widget ) {
if ( in_array( $widget['callback'], $done, true ) ) { // We already showed this multi-widget
continue;
}
$sidebar = is_active_widget( $widget['callback'], $widget['id'], false, false );
$done[] = $widget['callback'];
if ( ! isset( $widget['params'][0] ) ) {
$widget['params'][0] = array();
}
$available_widget = $widget;
unset( $available_widget['callback'] ); // not serializable to JSON
$args = array(
'widget_id' => $widget['id'],
'widget_name' => $widget['name'],
'_display' => 'template',
);
$is_disabled = false;
$is_multi_widget = ( isset( $wp_registered_widget_controls[$widget['id']]['id_base'] ) && isset( $widget['params'][0]['number'] ) );
if ( $is_multi_widget ) {
$id_base = $wp_registered_widget_controls[$widget['id']]['id_base'];
$args['_temp_id'] = "$id_base-__i__";
$args['_multi_num'] = next_widget_id_number( $id_base );
$args['_add'] = 'multi';
} else {
$args['_add'] = 'single';
if ( $sidebar && 'wp_inactive_widgets' !== $sidebar ) {
$is_disabled = true;
}
$id_base = $widget['id'];
}
$list_widget_controls_args = wp_list_widget_controls_dynamic_sidebar( array( 0 => $args, 1 => $widget['params'][0] ) );
$control_tpl = $this->get_widget_control( $list_widget_controls_args );
// The properties here are mapped to the Backbone Widget model.
$available_widget = array_merge( $available_widget, array(
'temp_id' => isset( $args['_temp_id'] ) ? $args['_temp_id'] : null,
'is_multi' => $is_multi_widget,
'control_tpl' => $control_tpl,
'multi_number' => ( $args['_add'] === 'multi' ) ? $args['_multi_num'] : false,
'is_disabled' => $is_disabled,
'id_base' => $id_base,
'transport' => 'refresh',
'width' => $wp_registered_widget_controls[$widget['id']]['width'],
'height' => $wp_registered_widget_controls[$widget['id']]['height'],
'is_wide' => $this->is_wide_widget( $widget['id'] ),
) );
$available_widgets[] = $available_widget;
}
return $available_widgets;
}
/**
* Naturally order available widgets by name.
*
* @since 3.9.0
* @static
* @access protected
*
* @param array $widget_a The first widget to compare.
* @param array $widget_b The second widget to compare.
* @return int Reorder position for the current widget comparison.
*/
protected function _sort_name_callback( $widget_a, $widget_b ) {
return strnatcasecmp( $widget_a['name'], $widget_b['name'] );
}
/**
* Get the widget control markup.
*
* @since 3.9.0
* @access public
*
* @param array $args Widget control arguments.
* @return string Widget control form HTML markup.
*/
public function get_widget_control( $args ) {
ob_start();
call_user_func_array( 'wp_widget_control', $args );
$replacements = array(
'<form method="post">' => '<div class="form">',
'</form>' => '</div><!-- .form -->',
);
$control_tpl = ob_get_clean();
$control_tpl = str_replace( array_keys( $replacements ), array_values( $replacements ), $control_tpl );
return $control_tpl;
}
/**
* Add hooks for the Customizer preview.
*
* @since 3.9.0
* @access public
*/
public function customize_preview_init() {
add_action( 'wp_enqueue_scripts', array( $this, 'customize_preview_enqueue' ) );
add_action( 'wp_print_styles', array( $this, 'print_preview_css' ), 1 );
add_action( 'wp_footer', array( $this, 'export_preview_data' ), 20 );
}
/**
* Refresh nonce for widget updates.
*
* @since 4.2.0
* @access public
*
* @param array $nonces Array of nonces.
* @return array $nonces Array of nonces.
*/
public function refresh_nonces( $nonces ) {
$nonces['update-widget'] = wp_create_nonce( 'update-widget' );
return $nonces;
}
/**
* When previewing, make sure the proper previewing widgets are used.
*
* Because wp_get_sidebars_widgets() gets called early at init
* (via wp_convert_widget_settings()) and can set global variable
* $_wp_sidebars_widgets to the value of get_option( 'sidebars_widgets' )
* before the Customizer preview filter is added, we have to reset
* it after the filter has been added.
*
* @since 3.9.0
* @access public
*
* @param array $sidebars_widgets List of widgets for the current sidebar.
*/
public function preview_sidebars_widgets( $sidebars_widgets ) {
$sidebars_widgets = get_option( 'sidebars_widgets' );
unset( $sidebars_widgets['array_version'] );
return $sidebars_widgets;
}
/**
* Enqueue scripts for the Customizer preview.
*
* @since 3.9.0
* @access public
*/
public function customize_preview_enqueue() {
wp_enqueue_script( 'customize-preview-widgets' );
}
/**
* Insert default style for highlighted widget at early point so theme
* stylesheet can override.
*
* @since 3.9.0
* @access public
*
* @action wp_print_styles
*/
public function print_preview_css() {
?>
<style>
.widget-customizer-highlighted-widget {
outline: none;
-webkit-box-shadow: 0 0 2px rgba(30,140,190,0.8);
box-shadow: 0 0 2px rgba(30,140,190,0.8);
position: relative;
z-index: 1;
}
</style>
<?php
}
/**
* At the very end of the page, at the very end of the wp_footer,
* communicate the sidebars that appeared on the page.
*
* @since 3.9.0
* @access public
*/
public function export_preview_data() {
// Prepare Customizer settings to pass to JavaScript.
$settings = array(
'renderedSidebars' => array_fill_keys( array_unique( $this->rendered_sidebars ), true ),
'renderedWidgets' => array_fill_keys( array_keys( $this->rendered_widgets ), true ),
'registeredSidebars' => array_values( $GLOBALS['wp_registered_sidebars'] ),
'registeredWidgets' => $GLOBALS['wp_registered_widgets'],
'l10n' => array(
'widgetTooltip' => __( 'Shift-click to edit this widget.' ),
),
);
foreach ( $settings['registeredWidgets'] as &$registered_widget ) {
unset( $registered_widget['callback'] ); // may not be JSON-serializeable
}
?>
<script type="text/javascript">
var _wpWidgetCustomizerPreviewSettings = <?php echo wp_json_encode( $settings ); ?>;
</script>
<?php
}
/**
* Keep track of the widgets that were rendered.
*
* @since 3.9.0
* @access public
*
* @param array $widget Rendered widget to tally.
*/
public function tally_rendered_widgets( $widget ) {
$this->rendered_widgets[ $widget['id'] ] = true;
}
/**
* Determine if a widget is rendered on the page.
*
* @since 4.0.0
* @access public
*
* @param string $widget_id Widget ID to check.
* @return bool Whether the widget is rendered.
*/
public function is_widget_rendered( $widget_id ) {
return in_array( $widget_id, $this->rendered_widgets );
}
/**
* Determine if a sidebar is rendered on the page.
*
* @since 4.0.0
* @access public
*
* @param string $sidebar_id Sidebar ID to check.
* @return bool Whether the sidebar is rendered.
*/
public function is_sidebar_rendered( $sidebar_id ) {
return in_array( $sidebar_id, $this->rendered_sidebars );
}
/**
* Tally the sidebars rendered via is_active_sidebar().
*
* Keep track of the times that is_active_sidebar() is called
* in the template, and assume that this means that the sidebar
* would be rendered on the template if there were widgets
* populating it.
*
* @since 3.9.0
* @access public
*
* @param bool $is_active Whether the sidebar is active.
* @param string $sidebar_id Sidebar ID.
*/
public function tally_sidebars_via_is_active_sidebar_calls( $is_active, $sidebar_id ) {
if ( isset( $GLOBALS['wp_registered_sidebars'][$sidebar_id] ) ) {
$this->rendered_sidebars[] = $sidebar_id;
}
/*
* We may need to force this to true, and also force-true the value
* for 'dynamic_sidebar_has_widgets' if we want to ensure that there
* is an area to drop widgets into, if the sidebar is empty.
*/
return $is_active;
}
/**
* Tally the sidebars rendered via dynamic_sidebar().
*
* Keep track of the times that dynamic_sidebar() is called in the template,
* and assume this means the sidebar would be rendered on the template if
* there were widgets populating it.
*
* @since 3.9.0
* @access public
*
* @param bool $has_widgets Whether the current sidebar has widgets.
* @param string $sidebar_id Sidebar ID.
*/
public function tally_sidebars_via_dynamic_sidebar_calls( $has_widgets, $sidebar_id ) {
if ( isset( $GLOBALS['wp_registered_sidebars'][$sidebar_id] ) ) {
$this->rendered_sidebars[] = $sidebar_id;
}
/*
* We may need to force this to true, and also force-true the value
* for 'is_active_sidebar' if we want to ensure there is an area to
* drop widgets into, if the sidebar is empty.
*/
return $has_widgets;
}
/**
* Get MAC for a serialized widget instance string.
*
* Allows values posted back from JS to be rejected if any tampering of the
* data has occurred.
*
* @since 3.9.0
* @access protected
*
* @param string $serialized_instance Widget instance.
* @return string MAC for serialized widget instance.
*/
protected function get_instance_hash_key( $serialized_instance ) {
return wp_hash( $serialized_instance );
}
/**
* Sanitize a widget instance.
*
* Unserialize the JS-instance for storing in the options. It's important
* that this filter only get applied to an instance once.
*
* @since 3.9.0
* @access public
*
* @param array $value Widget instance to sanitize.
* @return array Sanitized widget instance.
*/
public function sanitize_widget_instance( $value ) {
if ( $value === array() ) {
return $value;
}
if ( empty( $value['is_widget_customizer_js_value'] )
|| empty( $value['instance_hash_key'] )
|| empty( $value['encoded_serialized_instance'] ) )
{
return null;
}
$decoded = base64_decode( $value['encoded_serialized_instance'], true );
if ( false === $decoded ) {
return null;
}
if ( $this->get_instance_hash_key( $decoded ) !== $value['instance_hash_key'] ) {
return null;
}
$instance = unserialize( $decoded );
if ( false === $instance ) {
return null;
}
return $instance;
}
/**
* Convert widget instance into JSON-representable format.
*
* @since 3.9.0
* @access public
*
* @param array $value Widget instance to convert to JSON.
* @return array JSON-converted widget instance.
*/
public function sanitize_widget_js_instance( $value ) {
if ( empty( $value['is_widget_customizer_js_value'] ) ) {
$serialized = serialize( $value );
$value = array(
'encoded_serialized_instance' => base64_encode( $serialized ),
'title' => empty( $value['title'] ) ? '' : $value['title'],
'is_widget_customizer_js_value' => true,
'instance_hash_key' => $this->get_instance_hash_key( $serialized ),
);
}
return $value;
}
/**
* Strip out widget IDs for widgets which are no longer registered.
*
* One example where this might happen is when a plugin orphans a widget
* in a sidebar upon deactivation.
*
* @since 3.9.0
* @access public
*
* @param array $widget_ids List of widget IDs.
* @return array Parsed list of widget IDs.
*/
public function sanitize_sidebar_widgets_js_instance( $widget_ids ) {
global $wp_registered_widgets;
$widget_ids = array_values( array_intersect( $widget_ids, array_keys( $wp_registered_widgets ) ) );
return $widget_ids;
}
/**
* Find and invoke the widget update and control callbacks.
*
* Requires that $_POST be populated with the instance data.
*
* @since 3.9.0
* @access public
*
* @param string $widget_id Widget ID.
* @return WP_Error|array Array containing the updated widget information.
* A WP_Error object, otherwise.
*/
public function call_widget_update( $widget_id ) {
global $wp_registered_widget_updates, $wp_registered_widget_controls;
$this->start_capturing_option_updates();
$parsed_id = $this->parse_widget_id( $widget_id );
$option_name = 'widget_' . $parsed_id['id_base'];
/*
* If a previously-sanitized instance is provided, populate the input vars
* with its values so that the widget update callback will read this instance
*/
$added_input_vars = array();
if ( ! empty( $_POST['sanitized_widget_setting'] ) ) {
$sanitized_widget_setting = json_decode( $this->get_post_value( 'sanitized_widget_setting' ), true );
if ( false === $sanitized_widget_setting ) {
$this->stop_capturing_option_updates();
return new WP_Error( 'widget_setting_malformed' );
}
$instance = $this->sanitize_widget_instance( $sanitized_widget_setting );
if ( is_null( $instance ) ) {
$this->stop_capturing_option_updates();
return new WP_Error( 'widget_setting_unsanitized' );
}
if ( ! is_null( $parsed_id['number'] ) ) {
$value = array();
$value[$parsed_id['number']] = $instance;
$key = 'widget-' . $parsed_id['id_base'];
$_REQUEST[$key] = $_POST[$key] = wp_slash( $value );
$added_input_vars[] = $key;
} else {
foreach ( $instance as $key => $value ) {
$_REQUEST[$key] = $_POST[$key] = wp_slash( $value );
$added_input_vars[] = $key;
}
}
}
// Invoke the widget update callback.
foreach ( (array) $wp_registered_widget_updates as $name => $control ) {
if ( $name === $parsed_id['id_base'] && is_callable( $control['callback'] ) ) {
ob_start();
call_user_func_array( $control['callback'], $control['params'] );
ob_end_clean();
break;
}
}
// Clean up any input vars that were manually added
foreach ( $added_input_vars as $key ) {
unset( $_POST[ $key ] );
unset( $_REQUEST[ $key ] );
}
// Make sure the expected option was updated.
if ( 0 !== $this->count_captured_options() ) {
if ( $this->count_captured_options() > 1 ) {
$this->stop_capturing_option_updates();
return new WP_Error( 'widget_setting_too_many_options' );
}
$updated_option_name = key( $this->get_captured_options() );
if ( $updated_option_name !== $option_name ) {
$this->stop_capturing_option_updates();
return new WP_Error( 'widget_setting_unexpected_option' );
}
}
// Obtain the widget instance.
$option = $this->get_captured_option( $option_name );
if ( null !== $parsed_id['number'] ) {
$instance = $option[ $parsed_id['number'] ];
} else {
$instance = $option;
}
/*
* Override the incoming $_POST['customized'] for a newly-created widget's
* setting with the new $instance so that the preview filter currently
* in place from WP_Customize_Setting::preview() will use this value
* instead of the default widget instance value (an empty array).
*/
$setting_id = $this->get_setting_id( $widget_id );
$this->manager->set_post_value( $setting_id, $instance );
// Obtain the widget control with the updated instance in place.
ob_start();
$form = $wp_registered_widget_controls[ $widget_id ];
if ( $form ) {
call_user_func_array( $form['callback'], $form['params'] );
}
$form = ob_get_clean();
$this->stop_capturing_option_updates();
return compact( 'instance', 'form' );
}
/**
* Update widget settings asynchronously.
*
* Allows the Customizer to update a widget using its form, but return the new
* instance info via Ajax instead of saving it to the options table.
*
* Most code here copied from wp_ajax_save_widget()
*
* @since 3.9.0
* @access public
*
* @see wp_ajax_save_widget()
*
*/
public function wp_ajax_update_widget() {
if ( ! is_user_logged_in() ) {
wp_die( 0 );
}
check_ajax_referer( 'update-widget', 'nonce' );
if ( ! current_user_can( 'edit_theme_options' ) ) {
wp_die( -1 );
}
if ( empty( $_POST['widget-id'] ) ) {
wp_send_json_error( 'missing_widget-id' );
}
/** This action is documented in wp-admin/includes/ajax-actions.php */
do_action( 'load-widgets.php' );
/** This action is documented in wp-admin/includes/ajax-actions.php */
do_action( 'widgets.php' );
/** This action is documented in wp-admin/widgets.php */
do_action( 'sidebar_admin_setup' );
$widget_id = $this->get_post_value( 'widget-id' );
$parsed_id = $this->parse_widget_id( $widget_id );
$id_base = $parsed_id['id_base'];
$is_updating_widget_template = (
isset( $_POST[ 'widget-' . $id_base ] )
&&
is_array( $_POST[ 'widget-' . $id_base ] )
&&
preg_match( '/__i__|%i%/', key( $_POST[ 'widget-' . $id_base ] ) )
);
if ( $is_updating_widget_template ) {
wp_send_json_error( 'template_widget_not_updatable' );
}
$updated_widget = $this->call_widget_update( $widget_id ); // => {instance,form}
if ( is_wp_error( $updated_widget ) ) {
wp_send_json_error( $updated_widget->get_error_message() );
}
$form = $updated_widget['form'];
$instance = $this->sanitize_widget_js_instance( $updated_widget['instance'] );
wp_send_json_success( compact( 'form', 'instance' ) );
}
/***************************************************************************
* Option Update Capturing
***************************************************************************/
/**
* List of captured widget option updates.
*
* @since 3.9.0
* @access protected
* @var array $_captured_options Values updated while option capture is happening.
*/
protected $_captured_options = array();
/**
* Whether option capture is currently happening.
*
* @since 3.9.0
* @access protected
* @var bool $_is_current Whether option capture is currently happening or not.
*/
protected $_is_capturing_option_updates = false;
/**
* Determine whether the captured option update should be ignored.
*
* @since 3.9.0
* @access protected
*
* @param string $option_name Option name.
* @return boolean Whether the option capture is ignored.
*/
protected function is_option_capture_ignored( $option_name ) {
return ( 0 === strpos( $option_name, '_transient_' ) );
}
/**
* Retrieve captured widget option updates.
*
* @since 3.9.0
* @access protected
*
* @return array Array of captured options.
*/
protected function get_captured_options() {
return $this->_captured_options;
}
/**
* Get the option that was captured from being saved.
*
* @since 4.2.0
* @access protected
*
* @param string $option_name Option name.
* @param mixed $default Optional. Default value to return if the option does not exist.
* @return mixed Value set for the option.
*/
protected function get_captured_option( $option_name, $default = false ) {
if ( array_key_exists( $option_name, $this->_captured_options ) ) {
$value = $this->_captured_options[ $option_name ];
} else {
$value = $default;
}
return $value;
}
/**
* Get the number of captured widget option updates.
*
* @since 3.9.0
* @access protected
*
* @return int Number of updated options.
*/
protected function count_captured_options() {
return count( $this->_captured_options );
}
/**
* Start keeping track of changes to widget options, caching new values.
*
* @since 3.9.0
* @access protected
*/
protected function start_capturing_option_updates() {
if ( $this->_is_capturing_option_updates ) {
return;
}
$this->_is_capturing_option_updates = true;
add_filter( 'pre_update_option', array( $this, 'capture_filter_pre_update_option' ), 10, 3 );
}
/**
* Pre-filter captured option values before updating.
*
* @since 3.9.0
* @access public
*
* @param mixed $new_value The new option value.
* @param string $option_name Name of the option.
* @param mixed $old_value The old option value.
* @return mixed Filtered option value.
*/
public function capture_filter_pre_update_option( $new_value, $option_name, $old_value ) {
if ( $this->is_option_capture_ignored( $option_name ) ) {
return;
}
if ( ! isset( $this->_captured_options[ $option_name ] ) ) {
add_filter( "pre_option_{$option_name}", array( $this, 'capture_filter_pre_get_option' ) );
}
$this->_captured_options[ $option_name ] = $new_value;
return $old_value;
}
/**
* Pre-filter captured option values before retrieving.
*
* @since 3.9.0
* @access public
*
* @param mixed $value Value to return instead of the option value.
* @return mixed Filtered option value.
*/
public function capture_filter_pre_get_option( $value ) {
$option_name = preg_replace( '/^pre_option_/', '', current_filter() );
if ( isset( $this->_captured_options[ $option_name ] ) ) {
$value = $this->_captured_options[ $option_name ];
/** This filter is documented in wp-includes/option.php */
$value = apply_filters( 'option_' . $option_name, $value );
}
return $value;
}
/**
* Undo any changes to the options since options capture began.
*
* @since 3.9.0
* @access protected
*/
protected function stop_capturing_option_updates() {
if ( ! $this->_is_capturing_option_updates ) {
return;
}
remove_filter( 'pre_update_option', array( $this, 'capture_filter_pre_update_option' ), 10, 3 );
foreach ( array_keys( $this->_captured_options ) as $option_name ) {
remove_filter( "pre_option_{$option_name}", array( $this, 'capture_filter_pre_get_option' ) );
}
$this->_captured_options = array();
$this->_is_capturing_option_updates = false;
}
/**
* @since 3.9.0
* @deprecated 4.2.0 Deprecated in favor of customize_dynamic_setting_args filter.
*/
public function setup_widget_addition_previews() {
_deprecated_function( __METHOD__, '4.2.0' );
}
/**
* @since 3.9.0
* @deprecated 4.2.0 Deprecated in favor of customize_dynamic_setting_args filter.
*/
public function prepreview_added_sidebars_widgets() {
_deprecated_function( __METHOD__, '4.2.0' );
}
/**
* @since 3.9.0
* @deprecated 4.2.0 Deprecated in favor of customize_dynamic_setting_args filter.
*/
public function prepreview_added_widget_instance() {
_deprecated_function( __METHOD__, '4.2.0' );
}
/**
* @since 3.9.0
* @deprecated 4.2.0 Deprecated in favor of customize_dynamic_setting_args filter.
*/
public function remove_prepreview_filters() {
_deprecated_function( __METHOD__, '4.2.0' );
}
}
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