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Widget Customizer: First pass for inline docs. 

props DrewAPicture.
see #27534.
Built from https://develop.svn.wordpress.org/trunk@27753


git-svn-id: http://core.svn.wordpress.org/trunk@27590 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Dominik Schilling 2014-03-26 22:29:15 +00:00
parent 5f062ee60c
commit a2eb248e0b
1 changed files with 284 additions and 108 deletions
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370
wp-includes/class-wp-customize-widgets.php
View File

@ -1,6 +1,12 @@
<?php
/**
* Widget customizer manager class.
* Customize Widgets Class
*
* Implements widget management in the Customizer.
*
* @since 3.9.0
* @package WordPress
* @subpackage Customize
*/
class WP_Customize_Widgets {
const UPDATE_WIDGET_AJAX_ACTION = 'update-widget';
@ -9,6 +15,9 @@ class WP_Customize_Widgets {
/**
* All id_bases for widgets defined in core
*
* @since 3.9.0
* @static
* @access protected
* @var array
*/
protected static $core_widget_id_bases = array(
@ -27,8 +36,44 @@ class WP_Customize_Widgets {
'text',
);
/**
* @since 3.9.0
* @static
* @access protected
* @var
*/
protected static $_customized;
/**
* @since 3.9.0
* @static
* @access protected
* @var array
*/
protected static $_prepreview_added_filters = array();
/**
* @since 3.9.0
* @static
* @access protected
* @var array
*/
static protected $rendered_sidebars = array();
/**
* @since 3.9.0
* @static
* @access protected
* @var array
*/
static protected $rendered_widgets = array();
/**
* Initial loader.
*
* @since 3.9.0
* @static
* @access public
*/
static function setup() {
add_action( 'after_setup_theme', array( __CLASS__, 'setup_widget_addition_previews' ) );
@ -44,27 +89,35 @@ class WP_Customize_Widgets {
}
/**
* Get an unslashed post value, or return a default
* Get an unslashed post value or return a default.
*
* @param string $name
* @param mixed $default
* @return mixed
* @since 3.9.0
*
* @static
* @access public
*
* @param string $name Post value.
* @param mixed $default Default post value.
* @return mixed Unslashed post value or default value.
*/
static function get_post_value( $name, $default = null ) {
if ( ! isset( $_POST[$name] ) ) {
if ( ! isset( $_POST[ $name ] ) ) {
return $default;
}
return wp_unslash( $_POST[$name] );
}
protected static $_customized;
protected static $_prepreview_added_filters = array();
/**
*
*
* Since the widgets get registered (widgets_init) before the customizer settings are set up (customize_register),
* we have to filter the options similarly to how the setting previewer will filter the options later.
*
* @action after_setup_theme
* @since 3.9.0
*
* @static
* @access public
* @global WP_Customize_Manager $wp_customize
*/
static function setup_widget_addition_previews() {
global $wp_customize;
@ -99,11 +152,12 @@ class WP_Customize_Widgets {
return;
}
// Input from customizer preview
// Input from customizer preview.
if ( isset( $_POST['customized'] ) ) {
$customized = json_decode( self::get_post_value( 'customized' ), true );
}
// Input from ajax widget update request
// Input from ajax widget update request.
else {
$customized = array();
$id_base = self::get_post_value( 'id_base' );
@ -152,11 +206,17 @@ class WP_Customize_Widgets {
}
/**
*
*
* Ensure that newly-added widgets will appear in the widgets_sidebars.
* This is necessary because the customizer's setting preview filters are added after the widgets_init action,
* which is too late for the widgets to be set up properly.
*
* @param array $sidebars_widgets
* @since 3.9.0
* @static
* @access public
*
* @param array $sidebars_widgets Array of
* @return array
*/
static function prepreview_added_sidebars_widgets( $sidebars_widgets ) {
@ -170,13 +230,19 @@ class WP_Customize_Widgets {
}
/**
*
*
* Ensure that newly-added widgets will have empty instances so that they will be recognized.
* This is necessary because the customizer's setting preview filters are added after the widgets_init action,
* which is too late for the widgets to be set up properly.
*
* @param array $instance
* @param string $setting_id
* @return array
* @since 3.9.0
* @static
* @access public
*
* @param array $instance Widget instance.
* @param string $setting_id Widget setting ID.
* @return array Parsed widget instance.
*/
static function prepreview_added_widget_instance( $instance, $setting_id ) {
if ( isset( self::$_customized[$setting_id] ) ) {
@ -206,7 +272,9 @@ class WP_Customize_Widgets {
* Remove filters added in setup_widget_addition_previews() which ensure that
* widgets are populating the options during widgets_init
*
* @action wp_loaded
* @since 3.9.0
* @static
* @access public
*/
static function remove_prepreview_filters() {
foreach ( self::$_prepreview_added_filters as $prepreview_added_filter ) {
@ -218,8 +286,9 @@ class WP_Customize_Widgets {
/**
* Make sure that all widgets get loaded into customizer; these actions are also done in the wp_ajax_save_widget()
*
* @see wp_ajax_save_widget()
* @action customize_controls_init
* @since 3.9.0
* @static
* @access public
*/
static function customize_controls_init() {
do_action( 'load-widgets.php' );
@ -230,6 +299,12 @@ class WP_Customize_Widgets {
/**
* When in preview, invoke customize_register for settings after WordPress is
* loaded so that all filters have been initialized (e.g. Widget Visibility)
*
* @since 3.9.0
* @static
* @access public
*
* @param WP_Customize_Manager $wp_customize Customizer instance.
*/
static function schedule_customize_register( $wp_customize ) {
if ( is_admin() ) { // @todo for some reason, $wp_customize->is_preview() is true here?
@ -242,7 +317,11 @@ class WP_Customize_Widgets {
/**
* Register customizer settings and controls for all sidebars and widgets
*
* @action customize_register
* @since 3.9.0
* @static
* @access public
*
* @param WP_Customize_Manager $wp_customize Customizer instance.
*/
static function customize_register( $wp_customize = null ) {
global $wp_registered_widgets, $wp_registered_widget_controls, $wp_registered_sidebars;
@ -258,7 +337,7 @@ class WP_Customize_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).
*/
@ -318,11 +397,10 @@ class WP_Customize_Widgets {
}
}
/**
* Add a control for each active widget (located in a sidebar)
*/
// 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
// 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;
}
@ -349,10 +427,9 @@ class WP_Customize_Widgets {
}
}
/**
* We have to register these settings later than customize_preview_init so that other
* filters have had a chance to run.
* @see self::schedule_customize_register()
/*
* We have to register these settings later than customize_preview_init
* so that other filters have had a chance to run.
*/
if ( did_action( 'customize_preview_init' ) ) {
foreach ( $new_setting_ids as $new_setting_id ) {
@ -366,9 +443,12 @@ class WP_Customize_Widgets {
/**
* Covert a widget_id into its corresponding customizer setting id (option name)
*
* @param string $widget_id
* @see _get_widget_id_base()
* @return string
* @since 3.9.0
* @static
* @access public
*
* @param string $widget_id Widget ID.
* @return string Maybe-parsed widget ID.
*/
static function get_setting_id( $widget_id ) {
$parsed_widget_id = self::parse_widget_id( $widget_id );
@ -387,8 +467,12 @@ class WP_Customize_Widgets {
* not wide, but this can be overridden with the is_wide_widget_in_customizer
* filter.
*
* @param string $widget_id
* @return bool
* @since 3.9.0
* @static
* @access public
*
* @param string $widget_id Widget ID.
* @return bool Whether or not the widget is a "wide" widget.
*/
static function is_wide_widget( $widget_id ) {
global $wp_registered_widget_controls;
@ -396,15 +480,28 @@ class WP_Customize_Widgets {
$width = $wp_registered_widget_controls[$widget_id]['width'];
$is_core = in_array( $parsed_widget_id['id_base'], self::$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.
*/
$is_wide = apply_filters( 'is_wide_widget_in_customizer', $is_wide, $widget_id );
return $is_wide;
}
/**
* Covert a widget ID into its id_base and number components
* Covert a widget ID into its id_base and number components.
*
* @param string $widget_id
* @return array
* @since 3.9.0
* @static
* @access public
*
* @param string $widget_id Widget ID.
* @return array Array containing a widget's id_base and number components.
*/
static function parse_widget_id( $widget_id ) {
$parsed = array(
@ -422,10 +519,15 @@ class WP_Customize_Widgets {
}
/**
* Convert a widget setting ID (option path) to its id_base and number components
* Convert a widget setting ID (option path) to its id_base and number components.
*
* @param string $setting_id
* @return WP_Error|array
* @since 3.9.0
* @static
* @access public
*
* @param string $setting_id Widget setting ID.
* @return WP_Error|array Array contain a widget's id_base and number components,
* or a WP_Error object.
*/
static function parse_widget_setting_id( $setting_id ) {
if ( ! preg_match( '/^(widget_(.+?))(?:\[(\d+)\])?$/', $setting_id, $matches ) ) {
@ -438,9 +540,11 @@ class WP_Customize_Widgets {
}
/**
* Enqueue scripts and styles for customizer panel and export data to JS
* Enqueue scripts and styles for customizer panel and export data to JS.
*
* @action customize_controls_enqueue_scripts
* @since 3.9.0
* @static
* @access public
*/
static function customize_controls_enqueue_deps() {
wp_enqueue_style( 'customize-widgets' );
@ -482,7 +586,7 @@ class WP_Customize_Widgets {
'
);
// Why not wp_localize_script? Because we're not localizing, and it forces values into strings
// Why not wp_localize_script? Because we're not localizing, and it forces values into strings.
global $wp_scripts;
$exports = array(
'update_widget_ajax_action' => self::UPDATE_WIDGET_AJAX_ACTION,
@ -518,7 +622,9 @@ class WP_Customize_Widgets {
/**
* Render the widget form control templates into the DOM so that plugin scripts can manipulate them
*
* @action customize_controls_print_footer_scripts
* @since 3.9.0
* @static
* @access public
*/
static function output_widget_control_templates() {
?>
@ -540,9 +646,13 @@ class WP_Customize_Widgets {
/**
* Get common arguments to supply when constructing a customizer setting
*
* @param string $id
* @param array [$overrides]
* @return array
* @since 3.9.0
* @static
* @access public
*
* @param string $id Widget setting ID.
* @param array $overrides Array of setting overrides.
* @return array Possibly modified setting arguments.
*/
static function get_setting_args( $id, $overrides = array() ) {
$args = array(
@ -560,8 +670,12 @@ class WP_Customize_Widgets {
* Make sure that a sidebars_widgets[x] only ever consists of actual widget IDs.
* Used as sanitize_callback for each sidebars_widgets setting.
*
* @param array $widget_ids
* @return array
* @since 3.9.0
* @static
* @access public
*
* @param array $widget_ids Array of widget IDs.
* @return array Array of sanitized widget IDs.
*/
static function sanitize_sidebar_widgets( $widget_ids ) {
global $wp_registered_widgets;
@ -576,7 +690,11 @@ class WP_Customize_Widgets {
}
/**
* Build up an index of all available widgets for use in Backbone models
* Build up an index of all available widgets for use in Backbone models.
*
* @since 3.9.0
* @static
* @access public
*
* @see wp_list_widgets()
* @return array
@ -660,22 +778,30 @@ class WP_Customize_Widgets {
}
/**
* Replace with inline closure once on PHP 5.3:
* sort( $array, function ( $a, $b ) { return strnatcasecmp( $a['name'], $b['name'] ); } );
* Naturally order available widgets by name.
*
* @access private
* @since 3.9.0
* @static
* @access public
*
* @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.
*/
static function _sort_name_callback( $a, $b ) {
return strnatcasecmp( $a['name'], $b['name'] );
static function _sort_name_callback( $widget_a, $widget_b ) {
return strnatcasecmp( $widget_a['name'], $widget_b['name'] );
}
/**
* Invoke wp_widget_control() but capture the output buffer and transform the markup
* so that it can be used in the customizer.
*
* @see wp_widget_control()
* @param array $args
* @return string
* @since 3.9.0
* @static
* @access public
*
* @param array $args Widget control arguments.
* @return string Widget control form HTML markup.
*/
static function get_widget_control( $args ) {
ob_start();
@ -692,7 +818,9 @@ class WP_Customize_Widgets {
/**
* Add hooks for the customizer preview
*
* @action customize_preview_init
* @since 3.9.0
* @static
* @access public
*/
static function customize_preview_init() {
add_filter( 'sidebars_widgets', array( __CLASS__, 'preview_sidebars_widgets' ), 1 );
@ -702,12 +830,18 @@ class WP_Customize_Widgets {
}
/**
*
*
* 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.
*
* @filter sidebars_widgets
* @since 3.9.0
* @static
* @access public
*
* @param array $sidebars_widgets List of widgets for the current sidebar.
*/
static function preview_sidebars_widgets( $sidebars_widgets ) {
$sidebars_widgets = get_option( 'sidebars_widgets' );
@ -718,7 +852,9 @@ class WP_Customize_Widgets {
/**
* Enqueue scripts for the customizer preview
*
* @action wp_enqueue_scripts
* @since 3.9.0
* @static
* @access public
*/
static function customize_preview_enqueue() {
wp_enqueue_script( 'customize-preview-widgets' );
@ -728,6 +864,10 @@ class WP_Customize_Widgets {
* Insert default style for highlighted widget at early point so theme
* stylesheet can override.
*
* @since 3.9.0
* @static
* @access public
*
* @action wp_print_styles
*/
static function inject_preview_css() {
@ -745,9 +885,11 @@ class WP_Customize_Widgets {
}
/**
* At the very end of the page, at the very end of the wp_footer, communicate the sidebars that appeared on the page
* At the very end of the page, at the very end of the wp_footer, communicate the sidebars that appeared on the page.
*
* @action wp_footer
* @since 3.9.0
* @static
* @access public
*/
static function export_preview_data() {
// Prepare customizer settings to pass to Javascript.
@ -771,13 +913,14 @@ class WP_Customize_Widgets {
<?php
}
static protected $rendered_sidebars = array();
static protected $rendered_widgets = array();
/**
* Keep track of the widgets that were rendered
*
* @action dynamic_sidebar
* @since 3.9.0
* @static
* @access public
*
* @param array $widget Rendered widget to tally.
*/
static function tally_rendered_widgets( $widget ) {
self::$rendered_widgets[$widget['id']] = true;
@ -787,7 +930,12 @@ class WP_Customize_Widgets {
* 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.
*
* @filter is_active_sidebar
* @since 3.9.0
* @static
* @access public
*
* @param bool $is_active Whether the sidebar is active.
* @pasram string $sidebar_id Sidebar ID.
*/
static function tally_sidebars_via_is_active_sidebar_calls( $is_active, $sidebar_id ) {
if ( isset( $GLOBALS['wp_registered_sidebars'][$sidebar_id] ) ) {
@ -802,25 +950,38 @@ class WP_Customize_Widgets {
* Keep track of the times that dynamic_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.
*
* @filter dynamic_sidebar_has_widgets
* @since 3.9.0
* @static
* @access public
*
* @param bool $has_widgets Whether the current sidebar has widgets.
* @param string $sidebar_id Sidebar ID.
*/
static function tally_sidebars_via_dynamic_sidebar_calls( $has_widgets, $sidebar_id ) {
if ( isset( $GLOBALS['wp_registered_sidebars'][$sidebar_id] ) ) {
self::$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 that there is an area to drop widgets into, if the sidebar is empty.
/*
* We may need to force this to true, and also force-true the value for is_active_sidebar
* if we want to ensure that there is an area to drop widgets into, if the sidebar is empty.
*/
return $has_widgets;
}
/**
* Get a widget instance's hash key.
*
* Serialize an instance and hash it with the AUTH_KEY; when a JS value is
* posted back to save, this instance hash key is used to ensure that the
* serialized_instance was not tampered with, but that it had originated
* from WordPress and so is sanitized.
*
* @param array $instance
* @return string
* @since 3.9.0
* @static
* @access protected
*
* @param array $instance Widget instance.
* @return string Widget instance's hash key.
*/
protected static function get_instance_hash_key( $instance ) {
$hash = md5( AUTH_KEY . serialize( $instance ) );
@ -828,13 +989,19 @@ class WP_Customize_Widgets {
}
/**
* 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
* @static
* @access public
*
* @see Widget_Customizer::sanitize_widget_js_instance()
*
* @param array $value
* @return array
* @param array $value Widget instance to sanitize.
* @return array Sanitized widget instance.
*/
static function sanitize_widget_instance( $value ) {
if ( $value === array() ) {
@ -865,12 +1032,16 @@ class WP_Customize_Widgets {
}
/**
* Convert widget instance into JSON-representable format
* Convert widget instance into JSON-representable format.
*
* @since 3.9.0
* @static
* @access public
*
* @see Widget_Customizer::sanitize_widget_instance()
*
* @param array $value
* @return array
* @param array $value Widget instance to convert to JSON.
* @return array JSON-converted widget instance.
*/
static function sanitize_widget_js_instance( $value ) {
if ( empty( $value['is_widget_customizer_js_value'] ) ) {
@ -889,8 +1060,12 @@ class WP_Customize_Widgets {
* Strip out widget IDs for widgets which are no longer registered, such
* as the case when a plugin orphans a widget in a sidebar when it is deactivated.
*
* @param array $widget_ids
* @return array
* @since 3.9.0
* @static
* @access public
*
* @param array $widget_ids List of widget IDs.
* @return array Parsed list of widget IDs.
*/
static function sanitize_sidebar_widgets_js_instance( $widget_ids ) {
global $wp_registered_widgets;
@ -899,11 +1074,16 @@ class WP_Customize_Widgets {
}
/**
* Find and invoke the widget update and control callbacks. Requires that
* $_POST be populated with the instance data.
* Find and invoke the widget update and control callbacks.
*
* @param string $widget_id
* @return WP_Error|array
* Requires that $_POST be populated with the instance data.
*
* @since 3.9.0
* @static
* @access public
*
* @param string $widget_id Widget ID.
* @return WP_Error|array Array containing the updated widget information. WP_Error, otherwise.
*/
static function call_widget_update( $widget_id ) {
global $wp_registered_widget_updates, $wp_registered_widget_controls;
@ -914,7 +1094,7 @@ class WP_Customize_Widgets {
$parsed_id = self::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
*/
@ -946,9 +1126,7 @@ class WP_Customize_Widgets {
}
}
/**
* Invoke the widget update callback
*/
// 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();
@ -964,9 +1142,7 @@ class WP_Customize_Widgets {
unset( $_REQUEST[$key] );
}
/**
* Make sure the expected option was updated
*/
// Make sure the expected option was updated.
if ( 0 !== $options_transaction->count() ) {
if ( count( $options_transaction->options ) > 1 ) {
$options_transaction->rollback();
@ -980,9 +1156,7 @@ class WP_Customize_Widgets {
}
}
/**
* Obtain the widget control with the updated instance in place
*/
// Obtain the widget control with the updated instance in place.
ob_start();
$form = $wp_registered_widget_controls[$widget_id];
if ( $form ) {
@ -990,9 +1164,7 @@ class WP_Customize_Widgets {
}
$form = ob_get_clean();
/**
* Obtain the widget instance
*/
// Obtain the widget instance.
$option = get_option( $option_name );
if ( null !== $parsed_id['number'] ) {
$instance = $option[$parsed_id['number']];
@ -1009,6 +1181,10 @@ class WP_Customize_Widgets {
* 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
* @static
* @access public
*
* @see wp_ajax_save_widget
* @todo Reuse wp_ajax_save_widget now that we have option transactions?
* @action wp_ajax_update_widget