X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/3f5685912e89eb3b0534acd85aa0946b1ca2bbe3..refs/tags/wordpress-4.0:/wp-includes/widgets.php diff --git a/wp-includes/widgets.php b/wp-includes/widgets.php index 47c0e6fc..94220a26 100644 --- a/wp-includes/widgets.php +++ b/wp-includes/widgets.php @@ -19,18 +19,18 @@ * * @package WordPress * @subpackage Widgets - * @since 2.8 + * @since 2.8.0 */ class WP_Widget { - var $id_base; // Root id for all widgets of this type. - var $name; // Name for this widget type. - var $widget_options; // Option array passed to wp_register_sidebar_widget() - var $control_options; // Option array passed to wp_register_widget_control() + public $id_base; // Root id for all widgets of this type. + public $name; // Name for this widget type. + public $widget_options; // Option array passed to wp_register_sidebar_widget() + public $control_options; // Option array passed to wp_register_widget_control() - var $number = false; // Unique ID number of the current instance. - var $id = false; // Unique ID string of the current instance (id_base-number) - var $updated = false; // Set true when we update the data after a POST submit - makes sure we don't do it twice. + public $number = false; // Unique ID number of the current instance. + public $id = false; // Unique ID string of the current instance (id_base-number) + public $updated = false; // Set true when we update the data after a POST submit - makes sure we don't do it twice. // Member functions that you must over-ride. @@ -41,7 +41,7 @@ class WP_Widget { * @param array $args Display arguments including before_title, after_title, before_widget, and after_widget. * @param array $instance The settings for the particular instance of the widget */ - function widget($args, $instance) { + public function widget($args, $instance) { die('function WP_Widget::widget() must be over-ridden in a sub-class.'); } @@ -55,7 +55,7 @@ class WP_Widget { * @param array $old_instance Old settings for this instance * @return array Settings to save or bool false to cancel saving */ - function update($new_instance, $old_instance) { + public function update($new_instance, $old_instance) { return $new_instance; } @@ -63,20 +63,13 @@ class WP_Widget { * * @param array $instance Current settings */ - function form($instance) { + public function form($instance) { echo '

' . __('There are no options for this widget.') . '

'; return 'noform'; } // Functions you'll need to call. - /** - * PHP4 constructor - */ - function WP_Widget( $id_base = false, $name, $widget_options = array(), $control_options = array() ) { - $this->__construct( $id_base, $name, $widget_options, $control_options ); - } - /** * PHP5 constructor * @@ -90,7 +83,7 @@ class WP_Widget { * - width: required if more than 250px * - height: currently not used but may be needed in the future */ - function __construct( $id_base = false, $name, $widget_options = array(), $control_options = array() ) { + public function __construct( $id_base, $name, $widget_options = array(), $control_options = array() ) { $this->id_base = empty($id_base) ? preg_replace( '/(wp_)?widget_/', '', strtolower(get_class($this)) ) : strtolower($id_base); $this->name = $name; $this->option_name = 'widget_' . $this->id_base; @@ -98,6 +91,13 @@ class WP_Widget { $this->control_options = wp_parse_args( $control_options, array('id_base' => $this->id_base) ); } + /** + * PHP4 constructor + */ + public function WP_Widget( $id_base, $name, $widget_options = array(), $control_options = array() ) { + WP_Widget::__construct( $id_base, $name, $widget_options, $control_options ); + } + /** * Constructs name attributes for use in form() fields * @@ -106,7 +106,7 @@ class WP_Widget { * @param string $field_name Field name * @return string Name attribute for $field_name */ - function get_field_name($field_name) { + public function get_field_name($field_name) { return 'widget-' . $this->id_base . '[' . $this->number . '][' . $field_name . ']'; } @@ -118,13 +118,13 @@ class WP_Widget { * @param string $field_name Field name * @return string ID attribute for $field_name */ - function get_field_id($field_name) { + public function get_field_id($field_name) { return 'widget-' . $this->id_base . '-' . $this->number . '-' . $field_name; } // Private Functions. Don't worry about these. - function _register() { + public function _register() { $settings = $this->get_settings(); $empty = true; @@ -139,34 +139,49 @@ class WP_Widget { } if ( $empty ) { - // If there are none, we register the widget's existance with a + // If there are none, we register the widget's existence with a // generic template $this->_set(1); $this->_register_one(); } } - function _set($number) { + public function _set($number) { $this->number = $number; $this->id = $this->id_base . '-' . $number; } - function _get_display_callback() { - return array(&$this, 'display_callback'); + public function _get_display_callback() { + return array($this, 'display_callback'); } - function _get_update_callback() { - return array(&$this, 'update_callback'); + public function _get_update_callback() { + return array($this, 'update_callback'); } - function _get_form_callback() { - return array(&$this, 'form_callback'); + public function _get_form_callback() { + return array($this, 'form_callback'); + } + + /** + * Determine if we're in the Customizer; if true, then the object cache gets + * suspended and widgets should check this to decide whether they should + * store anything persistently to the object cache, to transients, or + * anywhere else. + * + * @since 3.9.0 + * + * @return bool True if Customizer is on, false if not. + */ + public function is_preview() { + global $wp_customize; + return ( isset( $wp_customize ) && $wp_customize->is_preview() ) ; } /** Generate the actual widget content. * Just finds the instance and calls widget(). * Do NOT over-ride this function. */ - function display_callback( $args, $widget_args = 1 ) { + public function display_callback( $args, $widget_args = 1 ) { if ( is_numeric($widget_args) ) $widget_args = array( 'number' => $widget_args ); @@ -176,30 +191,53 @@ class WP_Widget { if ( array_key_exists( $this->number, $instance ) ) { $instance = $instance[$this->number]; - // filters the widget's settings, return false to stop displaying the widget - $instance = apply_filters('widget_display_callback', $instance, $this, $args); - if ( false !== $instance ) - $this->widget($args, $instance); + + /** + * Filter the settings for a particular widget instance. + * + * Returning false will effectively short-circuit display of the widget. + * + * @since 2.8.0 + * + * @param array $instance The current widget instance's settings. + * @param WP_Widget $this The current widget instance. + * @param array $args An array of default widget arguments. + */ + $instance = apply_filters( 'widget_display_callback', $instance, $this, $args ); + + if ( false === $instance ) { + return; + } + + $was_cache_addition_suspended = wp_suspend_cache_addition(); + if ( $this->is_preview() && ! $was_cache_addition_suspended ) { + wp_suspend_cache_addition( true ); + } + + $this->widget( $args, $instance ); + + if ( $this->is_preview() ) { + wp_suspend_cache_addition( $was_cache_addition_suspended ); + } } } - /** Deal with changed settings. - * Do NOT over-ride this function. */ - function update_callback( $widget_args = 1 ) { + /** + * Deal with changed settings. + * + * Do NOT over-ride this function. + * + * @param mixed $deprecated Not used. + */ + public function update_callback( $deprecated = 1 ) { global $wp_registered_widgets; - if ( is_numeric($widget_args) ) - $widget_args = array( 'number' => $widget_args ); - - $widget_args = wp_parse_args( $widget_args, array( 'number' => -1 ) ); $all_instances = $this->get_settings(); // We need to update the data if ( $this->updated ) return; - $sidebars_widgets = wp_get_sidebars_widgets(); - if ( isset($_POST['delete_widget']) && $_POST['delete_widget'] ) { // Delete the settings for this instance of the widget if ( isset($_POST['the-widget-id']) ) @@ -229,12 +267,34 @@ class WP_Widget { $old_instance = isset($all_instances[$number]) ? $all_instances[$number] : array(); - $instance = $this->update($new_instance, $old_instance); + $was_cache_addition_suspended = wp_suspend_cache_addition(); + if ( $this->is_preview() && ! $was_cache_addition_suspended ) { + wp_suspend_cache_addition( true ); + } + + $instance = $this->update( $new_instance, $old_instance ); - // filters the widget's settings before saving, return false to cancel saving (keep the old settings if updating) - $instance = apply_filters('widget_update_callback', $instance, $new_instance, $old_instance, $this); - if ( false !== $instance ) + if ( $this->is_preview() ) { + wp_suspend_cache_addition( $was_cache_addition_suspended ); + } + + /** + * Filter a widget's settings before saving. + * + * Returning false will effectively short-circuit the widget's ability + * to update settings. + * + * @since 2.8.0 + * + * @param array $instance The current widget instance's settings. + * @param array $new_instance Array of new widget settings. + * @param array $old_instance Array of old widget settings. + * @param WP_Widget $this The current widget instance. + */ + $instance = apply_filters( 'widget_update_callback', $instance, $new_instance, $old_instance, $this ); + if ( false !== $instance ) { $all_instances[$number] = $instance; + } break; // run only once } @@ -244,9 +304,12 @@ class WP_Widget { $this->updated = true; } - /** Generate the control form. - * Do NOT over-ride this function. */ - function form_callback( $widget_args = 1 ) { + /** + * Generate the control form. + * + * Do NOT over-ride this function. + */ + public function form_callback( $widget_args = 1 ) { if ( is_numeric($widget_args) ) $widget_args = array( 'number' => $widget_args ); @@ -262,32 +325,56 @@ class WP_Widget { $instance = $all_instances[ $widget_args['number'] ]; } - // filters the widget admin form before displaying, return false to stop displaying it - $instance = apply_filters('widget_form_callback', $instance, $this); + /** + * Filter the widget instance's settings before displaying the control form. + * + * Returning false effectively short-circuits display of the control form. + * + * @since 2.8.0 + * + * @param array $instance The current widget instance's settings. + * @param WP_Widget $this The current widget instance. + */ + $instance = apply_filters( 'widget_form_callback', $instance, $this ); $return = null; if ( false !== $instance ) { $return = $this->form($instance); - // add extra fields in the widget form - be sure to set $return to null if you add any - // if the widget has no form the text echoed from the default form method can be hidden using css - do_action_ref_array( 'in_widget_form', array(&$this, &$return, $instance) ); + + /** + * Fires at the end of the widget control form. + * + * Use this hook to add extra fields to the widget form. The hook + * is only fired if the value passed to the 'widget_form_callback' + * hook is not false. + * + * Note: If the widget has no form, the text echoed from the default + * form method can be hidden using CSS. + * + * @since 2.8.0 + * + * @param WP_Widget $this The widget instance, passed by reference. + * @param null $return Return null if new fields are added. + * @param array $instance An array of the widget's settings. + */ + do_action_ref_array( 'in_widget_form', array( &$this, &$return, $instance ) ); } return $return; } /** Helper function: Registers a single instance. */ - function _register_one($number = -1) { + public function _register_one($number = -1) { wp_register_sidebar_widget( $this->id, $this->name, $this->_get_display_callback(), $this->widget_options, array( 'number' => $number ) ); _register_widget_update_callback( $this->id_base, $this->_get_update_callback(), $this->control_options, array( 'number' => -1 ) ); _register_widget_form_callback( $this->id, $this->name, $this->_get_form_callback(), $this->control_options, array( 'number' => $number ) ); } - function save_settings($settings) { + public function save_settings($settings) { $settings['_multiwidget'] = 1; update_option( $this->option_name, $settings ); } - function get_settings() { + public function get_settings() { $settings = get_option($this->option_name); if ( false === $settings && isset($this->alt_option_name) ) @@ -296,8 +383,8 @@ class WP_Widget { if ( !is_array($settings) ) $settings = array(); - if ( !array_key_exists('_multiwidget', $settings) ) { - // old format, conver if single widget + if ( !empty($settings) && !array_key_exists('_multiwidget', $settings) ) { + // old format, convert if single widget $settings = wp_convert_widget_settings($this->id_base, $this->option_name, $settings); } @@ -311,25 +398,25 @@ class WP_Widget { * * @package WordPress * @subpackage Widgets - * @since 2.8 + * @since 2.8.0 */ class WP_Widget_Factory { - var $widgets = array(); + public $widgets = array(); - function WP_Widget_Factory() { - add_action( 'widgets_init', array( &$this, '_register_widgets' ), 100 ); + public function WP_Widget_Factory() { + add_action( 'widgets_init', array( $this, '_register_widgets' ), 100 ); } - function register($widget_class) { - $this->widgets[$widget_class] = & new $widget_class(); + public function register($widget_class) { + $this->widgets[$widget_class] = new $widget_class(); } - function unregister($widget_class) { + public function unregister($widget_class) { if ( isset($this->widgets[$widget_class]) ) unset($this->widgets[$widget_class]); } - function _register_widgets() { + public function _register_widgets() { global $wp_registered_widgets; $keys = array_keys($this->widgets); $registered = array_keys($wp_registered_widgets); @@ -385,8 +472,8 @@ $_wp_sidebars_widgets = array(); /** * Private */ - $_wp_deprecated_widgets_callbacks = array( - 'wp_widget_pages', +$GLOBALS['_wp_deprecated_widgets_callbacks'] = array( + 'wp_widget_pages', 'wp_widget_pages_control', 'wp_widget_calendar', 'wp_widget_calendar_control', @@ -408,7 +495,7 @@ $_wp_sidebars_widgets = array(); 'wp_widget_rss_control', 'wp_widget_recent_comments', 'wp_widget_recent_comments_control' - ); +); /* Template tags & API functions */ @@ -461,7 +548,8 @@ function unregister_widget($widget_class) { * The default for the name is "Sidebar #", with '#' being replaced with the * number the sidebar is currently when greater than one. If first sidebar, the * name will be just "Sidebar". The default for id is "sidebar-" followed by the - * number the sidebar creation is currently at. + * number the sidebar creation is currently at. If the id is provided, and multiple + * sidebars are being defined, the id will have "-2" appended, and so on. * * @since 2.2.0 * @@ -480,25 +568,27 @@ function register_sidebars($number = 1, $args = array()) { if ( is_string($args) ) parse_str($args, $args); - for ( $i=1; $i <= $number; $i++ ) { + for ( $i = 1; $i <= $number; $i++ ) { $_args = $args; - if ( $number > 1 ) { + if ( $number > 1 ) $_args['name'] = isset($args['name']) ? sprintf($args['name'], $i) : sprintf(__('Sidebar %d'), $i); - } else { + else $_args['name'] = isset($args['name']) ? $args['name'] : __('Sidebar'); - } - if (isset($args['id'])) { + // Custom specified ID's are suffixed if they exist already. + // Automatically generated sidebar names need to be suffixed regardless starting at -0 + if ( isset($args['id']) ) { $_args['id'] = $args['id']; + $n = 2; // Start at -2 for conflicting custom ID's + while ( isset($wp_registered_sidebars[$_args['id']]) ) + $_args['id'] = $args['id'] . '-' . $n++; } else { $n = count($wp_registered_sidebars); do { - $n++; - $_args['id'] = "sidebar-$n"; - } while (isset($wp_registered_sidebars[$_args['id']])); + $_args['id'] = 'sidebar-' . ++$n; + } while ( isset($wp_registered_sidebars[$_args['id']]) ); } - register_sidebar($_args); } } @@ -506,59 +596,77 @@ function register_sidebars($number = 1, $args = array()) { /** * Builds the definition for a single sidebar and returns the ID. * - * The $args parameter takes either a string or an array with 'name' and 'id' - * contained in either usage. It will be noted that the values will be applied - * to all sidebars, so if creating more than one, it will be advised to allow - * for WordPress to create the defaults for you. - * - * Example for string would be 'name=whatever;id=whatever1' and for - * the array it would be array( - * 'name' => 'whatever', - * 'id' => 'whatever1'). - * - * name - The name of the sidebar, which presumably the title which will be - * displayed. - * id - The unique identifier by which the sidebar will be called by. - * before_widget - The content that will prepended to the widgets when they are - * displayed. - * after_widget - The content that will be appended to the widgets when they are - * displayed. - * before_title - The content that will be prepended to the title when displayed. - * after_title - the content that will be appended to the title when displayed. - * - * Content is assumed to be HTML and should be formatted as such, but - * doesn't have to be. + * Accepts either a string or an array and then parses that against a set + * of default arguments for the new sidebar. WordPress will automatically + * generate a sidebar ID and name based on the current number of registered + * sidebars if those arguments are not included. + * + * When allowing for automatic generation of the name and ID parameters, keep + * in mind that the incrementor for your sidebar can change over time depending + * on what other plugins and themes are installed. + * + * If theme support for 'widgets' has not yet been added when this function is + * called, it will be automatically enabled through the use of add_theme_support() + * + * Arguments passed as a string should be separated by '&': + * + * e.g. 'name=Sidebar&id=my_prefix_sidebar' + * + * The same arguments passed as an array: + * + * array( + * 'name' => 'Sidebar', + * 'id' => 'my_prefix_sidebar', + * ) + * + * Arguments: + * name - The name or title of the sidebar displayed in the admin dashboard. + * id - The unique identifier by which the sidebar will be called. + * before_widget - HTML content that will be prepended to each widget's HTML output + * when assigned to this sidebar. + * after_widget - HTML content that will be appended to each widget's HTML output + * when assigned to this sidebar. + * before_title - HTML content that will be prepended to the sidebar title when displayed. + * after_title - HTML content that will be appended to the sidebar title when displayed. * * @since 2.2.0 * @uses $wp_registered_sidebars Stores the new sidebar in this array by sidebar ID. - * @uses parse_str() Converts a string to an array to be used in the rest of the function. - * @usedby register_sidebars() + * @uses add_theme_support() to ensure widget support has been added. * - * @param string|array $args Builds Sidebar based off of 'name' and 'id' values - * @return string The sidebar id that was added. + * @param string|array $args Arguments for the sidebar being registered. + * @return string Sidebar ID added to $wp_registered_sidebars global. */ function register_sidebar($args = array()) { global $wp_registered_sidebars; - if ( is_string($args) ) - parse_str($args, $args); - $i = count($wp_registered_sidebars) + 1; $defaults = array( 'name' => sprintf(__('Sidebar %d'), $i ), 'id' => "sidebar-$i", 'description' => '', + 'class' => '', 'before_widget' => '
  • ', 'after_widget' => "
    • \n", 'before_title' => '

    ', 'after_title' => "

    \n", ); - $sidebar = array_merge($defaults, (array) $args); + $sidebar = wp_parse_args( $args, $defaults ); $wp_registered_sidebars[$sidebar['id']] = $sidebar; + add_theme_support('widgets'); + + /** + * Fires once a sidebar has been registered. + * + * @since 3.0.0 + * + * @param array $sidebar Parsed arguments for the registered sidebar. + */ + do_action( 'register_sidebar', $sidebar ); + return $sidebar['id']; } @@ -581,9 +689,9 @@ function unregister_sidebar( $name ) { /** * Register widget for use in sidebars. * - * The default widget option is 'classname' that can be override. + * The default widget option is 'classname' that can be overridden. * - * The function can also be used to unregister widgets when $output_callback + * The function can also be used to un-register widgets when $output_callback * parameter is an empty string. * * @since 2.2.0 @@ -594,7 +702,7 @@ function unregister_sidebar( $name ) { * @param int|string $id Widget ID. * @param string $name Widget display title. * @param callback $output_callback Run when widget is called. - * @param array|string Optional. $options Widget Options. + * @param array|string $options Optional. Widget Options. * @param mixed $params,... Widget parameters to add to widget. * @return null Will return if $output_callback is empty after removing widget. */ @@ -629,8 +737,18 @@ function wp_register_sidebar_widget($id, $name, $output_callback, $options = arr ); $widget = array_merge($widget, $options); - if ( is_callable($output_callback) && ( !isset($wp_registered_widgets[$id]) || did_action( 'widgets_init' ) ) ) + if ( is_callable($output_callback) && ( !isset($wp_registered_widgets[$id]) || did_action( 'widgets_init' ) ) ) { + + /** + * Fires once for each registered widget. + * + * @since 3.0.0 + * + * @param array $widget An array of default widget arguments. + */ + do_action( 'wp_register_sidebar_widget', $widget ); $wp_registered_widgets[$id] = $widget; + } } /** @@ -676,7 +794,6 @@ function wp_sidebar_description( $id ) { return esc_html( $wp_registered_sidebars[$id]['description'] ); } - /** * Remove widget from sidebar. * @@ -685,6 +802,16 @@ function wp_sidebar_description( $id ) { * @param int|string $id Widget ID. */ function wp_unregister_sidebar_widget($id) { + + /** + * Fires just before a widget is removed from a sidebar. + * + * @since 3.0.0 + * + * @param int $id The widget ID. + */ + do_action( 'wp_unregister_sidebar_widget', $id ); + wp_register_sidebar_widget($id, '', ''); wp_unregister_widget_control($id); } @@ -816,20 +943,13 @@ function wp_unregister_widget_control($id) { /** * Display dynamic sidebar. * - * By default it displays the default sidebar or 'sidebar-1'. The 'sidebar-1' is - * not named by the theme, the actual name is '1', but 'sidebar-' is added to - * the registered sidebars for the name. If you named your sidebar 'after-post', - * then the parameter $index will still be 'after-post', but the lookup will be - * for 'sidebar-after-post'. - * - * It is confusing for the $index parameter, but just know that it should just - * work. When you register the sidebar in the theme, you will use the same name - * for this function or "Pay no heed to the man behind the curtain." Just accept - * it as an oddity of WordPress sidebar register and display. + * By default this displays the default sidebar or 'sidebar-1'. If your theme specifies the 'id' or + * 'name' parameter for its registered sidebars you can pass an id or name as the $index parameter. + * Otherwise, you can pass in a numerical index to display the sidebar at that index. * * @since 2.2.0 * - * @param int|string $index Optional, default is 1. Name or ID of dynamic sidebar. + * @param int|string $index Optional, default is 1. Index, name or ID of dynamic sidebar. * @return bool True, if widget sidebar was found and called. False if not found or not called. */ function dynamic_sidebar($index = 1) { @@ -848,10 +968,28 @@ function dynamic_sidebar($index = 1) { } $sidebars_widgets = wp_get_sidebars_widgets(); + if ( empty( $wp_registered_sidebars[ $index ] ) || empty( $sidebars_widgets[ $index ] ) || ! is_array( $sidebars_widgets[ $index ] ) ) { + /** This action is documented in wp-includes/widgets.php */ + do_action( 'dynamic_sidebar_before', $index, false ); + /** This action is documented in wp-includes/widgets.php */ + do_action( 'dynamic_sidebar_after', $index, false ); + /** This filter is documented in wp-includes/widgets.php */ + return apply_filters( 'dynamic_sidebar_has_widgets', false, $index ); + } - if ( empty($wp_registered_sidebars[$index]) || !array_key_exists($index, $sidebars_widgets) || !is_array($sidebars_widgets[$index]) || empty($sidebars_widgets[$index]) ) - return false; - + /** + * Fires before widgets are rendered in a dynamic sidebar. + * + * Note: The action also fires for empty sidebars, and on both the front-end + * and back-end, including the Inactive Widgets sidebar on the Widgets screen. + * + * @since 3.9.0 + * + * @param int|string $index Index, name, or ID of the dynamic sidebar. + * @param bool $has_widgets Whether the sidebar is populated with widgets. + * Default true. + */ + do_action( 'dynamic_sidebar_before', $index, true ); $sidebar = $wp_registered_sidebars[$index]; $did_one = false; @@ -875,21 +1013,109 @@ function dynamic_sidebar($index = 1) { $classname_ = ltrim($classname_, '_'); $params[0]['before_widget'] = sprintf($params[0]['before_widget'], $id, $classname_); + /** + * Filter the parameters passed to a widget's display callback. + * + * Note: The filter is evaluated on both the front-end and back-end, + * including for the Inactive Widgets sidebar on the Widgets screen. + * + * @since 2.5.0 + * + * @see register_sidebar() + * + * @param array $params { + * @type array $args { + * An array of widget display arguments. + * + * @type string $name Name of the sidebar the widget is assigned to. + * @type string $id ID of the sidebar the widget is assigned to. + * @type string $description The sidebar description. + * @type string $class CSS class applied to the sidebar container. + * @type string $before_widget HTML markup to prepend to each widget in the sidebar. + * @type string $after_widget HTML markup to append to each widget in the sidebar. + * @type string $before_title HTML markup to prepend to the widget title when displayed. + * @type string $after_title HTML markup to append to the widget title when displayed. + * @type string $widget_id ID of the widget. + * @type string $widget_name Name of the widget. + * } + * @type array $widget_args { + * An array of multi-widget arguments. + * + * @type int $number Number increment used for multiples of the same widget. + * } + * } + */ $params = apply_filters( 'dynamic_sidebar_params', $params ); $callback = $wp_registered_widgets[$id]['callback']; + /** + * Fires before a widget's display callback is called. + * + * Note: The action fires on both the front-end and back-end, including + * for widgets in the Inactive Widgets sidebar on the Widgets screen. + * + * The action is not fired for empty sidebars. + * + * @since 3.0.0 + * + * @param array $widget_id { + * An associative array of widget arguments. + * + * @type string $name Name of the widget. + * @type string $id Widget ID. + * @type array|callback $callback When the hook is fired on the front-end, $callback is an array + * containing the widget object. Fired on the back-end, $callback + * is 'wp_widget_control', see $_callback. + * @type array $params An associative array of multi-widget arguments. + * @type string $classname CSS class applied to the widget container. + * @type string $description The widget description. + * @type array $_callback When the hook is fired on the back-end, $_callback is populated + * with an array containing the widget object, see $callback. + * } + */ + do_action( 'dynamic_sidebar', $wp_registered_widgets[ $id ] ); + if ( is_callable($callback) ) { call_user_func_array($callback, $params); $did_one = true; } } + /** + * Fires after widgets are rendered in a dynamic sidebar. + * + * Note: The action also fires for empty sidebars, and on both the front-end + * and back-end, including the Inactive Widgets sidebar on the Widgets screen. + * + * @since 3.9.0 + * + * @param int|string $index Index, name, or ID of the dynamic sidebar. + * @param bool $has_widgets Whether the sidebar is populated with widgets. + * Default true. + */ + do_action( 'dynamic_sidebar_after', $index, true ); + + /** + * Filter whether a sidebar has widgets. + * + * Note: The filter is also evaluated for empty sidebars, and on both the front-end + * and back-end, including the Inactive Widgets sidebar on the Widgets screen. + * + * @since 3.9.0 + * + * @param bool $did_one Whether at least one widget was rendered in the sidebar. + * Default false. + * @param int|string $index Index, name, or ID of the dynamic sidebar. + */ + + $did_one = apply_filters( 'dynamic_sidebar_has_widgets', $did_one, $index ); + return $did_one; } /** - * Whether widget is displayied on the front-end. + * Whether widget is displayed on the front-end. * * Either $callback or $id_base can be used * $id_base is the first argument when extending WP_Widget class @@ -903,7 +1129,7 @@ function dynamic_sidebar($index = 1) { * * @since 2.2.0 * - * @param callback Optional, Widget callback to check. + * @param string $callback Optional, Widget callback to check. * @param int $widget_id Optional, but needed for checking. Widget ID. * @param string $id_base Optional, the base ID of a widget created by extending WP_Widget. * @param bool $skip_inactive Optional, whether to check in 'wp_inactive_widgets'. @@ -916,8 +1142,9 @@ function is_active_widget($callback = false, $widget_id = false, $id_base = fals if ( is_array($sidebars_widgets) ) { foreach ( $sidebars_widgets as $sidebar => $widgets ) { - if ( $skip_inactive && 'wp_inactive_widgets' == $sidebar ) + if ( $skip_inactive && ( 'wp_inactive_widgets' === $sidebar || 'orphaned_widgets' === substr( $sidebar, 0, 16 ) ) ) { continue; + } if ( is_array($widgets) ) { foreach ( $widgets as $widget ) { @@ -955,18 +1182,26 @@ function is_dynamic_sidebar() { /** * Whether a sidebar is in use. * - * @since 2.8 + * @since 2.8.0 * - * @param mixed $index, sidebar name, id or number to check. + * @param mixed $index Sidebar name, id or number to check. * @return bool true if the sidebar is in use, false otherwise. */ function is_active_sidebar( $index ) { $index = ( is_int($index) ) ? "sidebar-$index" : sanitize_title($index); $sidebars_widgets = wp_get_sidebars_widgets(); - if ( isset($sidebars_widgets[$index]) && !empty($sidebars_widgets[$index]) ) - return true; + $is_active_sidebar = ! empty( $sidebars_widgets[$index] ); - return false; + /** + * Filter whether a dynamic sidebar is considered "active". + * + * @since 3.9.0 + * + * @param bool $is_active_sidebar Whether or not the sidebar should be considered "active". + * In other words, whether the sidebar contains any widgets. + * @param int|string $index Index, name, or ID of the dynamic sidebar. + */ + return apply_filters( 'is_active_sidebar', $is_active_sidebar, $index ); } /* Internal Functions */ @@ -980,11 +1215,14 @@ function is_active_sidebar( $index ) { * @since 2.2.0 * @access private * - * @param bool $update Optional, deprecated. + * @param bool $deprecated Not used (deprecated). * @return array Upgraded list of widgets to version 3 array format when called from the admin. */ function wp_get_sidebars_widgets($deprecated = true) { - global $wp_registered_widgets, $wp_registered_sidebars, $_wp_sidebars_widgets; + if ( $deprecated !== true ) + _deprecated_argument( __FUNCTION__, '2.8.1' ); + + global $_wp_sidebars_widgets, $sidebars_widgets; // If loading from front page, consult $_wp_sidebars_widgets rather than options // to see if wp_convert_widget_settings() has made manipulations in memory. @@ -995,84 +1233,19 @@ function wp_get_sidebars_widgets($deprecated = true) { $sidebars_widgets = $_wp_sidebars_widgets; } else { $sidebars_widgets = get_option('sidebars_widgets', array()); - $_sidebars_widgets = array(); - - if ( isset($sidebars_widgets['wp_inactive_widgets']) || empty($sidebars_widgets) ) - $sidebars_widgets['array_version'] = 3; - elseif ( !isset($sidebars_widgets['array_version']) ) - $sidebars_widgets['array_version'] = 1; - - switch ( $sidebars_widgets['array_version'] ) { - case 1 : - foreach ( (array) $sidebars_widgets as $index => $sidebar ) - if ( is_array($sidebar) ) - foreach ( (array) $sidebar as $i => $name ) { - $id = strtolower($name); - if ( isset($wp_registered_widgets[$id]) ) { - $_sidebars_widgets[$index][$i] = $id; - continue; - } - $id = sanitize_title($name); - if ( isset($wp_registered_widgets[$id]) ) { - $_sidebars_widgets[$index][$i] = $id; - continue; - } - - $found = false; - - foreach ( $wp_registered_widgets as $widget_id => $widget ) { - if ( strtolower($widget['name']) == strtolower($name) ) { - $_sidebars_widgets[$index][$i] = $widget['id']; - $found = true; - break; - } elseif ( sanitize_title($widget['name']) == sanitize_title($name) ) { - $_sidebars_widgets[$index][$i] = $widget['id']; - $found = true; - break; - } - } - - if ( $found ) - continue; - - unset($_sidebars_widgets[$index][$i]); - } - $_sidebars_widgets['array_version'] = 2; - $sidebars_widgets = $_sidebars_widgets; - unset($_sidebars_widgets); - - case 2 : - $sidebars = array_keys( $wp_registered_sidebars ); - if ( !empty( $sidebars ) ) { - // Move the known-good ones first - foreach ( (array) $sidebars as $id ) { - if ( array_key_exists( $id, $sidebars_widgets ) ) { - $_sidebars_widgets[$id] = $sidebars_widgets[$id]; - unset($sidebars_widgets[$id], $sidebars[$id]); - } - } - - // move the rest to wp_inactive_widgets - if ( !isset($_sidebars_widgets['wp_inactive_widgets']) ) - $_sidebars_widgets['wp_inactive_widgets'] = array(); - - if ( !empty($sidebars_widgets) ) { - foreach ( $sidebars_widgets as $lost => $val ) { - if ( is_array($val) ) - $_sidebars_widgets['wp_inactive_widgets'] = array_merge( (array) $_sidebars_widgets['wp_inactive_widgets'], $val ); - } - } - - $sidebars_widgets = $_sidebars_widgets; - unset($_sidebars_widgets); - } - } } - if ( isset($sidebars_widgets['array_version']) ) + if ( is_array( $sidebars_widgets ) && isset($sidebars_widgets['array_version']) ) unset($sidebars_widgets['array_version']); - $sidebars_widgets = apply_filters('sidebars_widgets', $sidebars_widgets); + /** + * Filter the list of sidebars and their widgets. + * + * @since 2.7.0 + * + * @param array $sidebars_widgets An associative array of sidebars and their widgets. + */ + $sidebars_widgets = apply_filters( 'sidebars_widgets', $sidebars_widgets ); return $sidebars_widgets; } @@ -1168,117 +1341,9 @@ function wp_convert_widget_settings($base_name, $option_name, $settings) { } /** - * Deprecated API - */ - -/** - * Register widget for sidebar with backwards compatibility. - * - * Allows $name to be an array that accepts either three elements to grab the - * first element and the third for the name or just uses the first element of - * the array for the name. - * - * Passes to {@link wp_register_sidebar_widget()} after argument list and - * backwards compatibility is complete. - * - * @since 2.2.0 - * @uses wp_register_sidebar_widget() Passes the compiled arguments. - * - * @param string|int $name Widget ID. - * @param callback $output_callback Run when widget is called. - * @param string $classname Classname widget option. - * @param mixed $params,... Widget parameters. - */ -function register_sidebar_widget($name, $output_callback, $classname = '') { - // Compat - if ( is_array($name) ) { - if ( count($name) == 3 ) - $name = sprintf($name[0], $name[2]); - else - $name = $name[0]; - } - - $id = sanitize_title($name); - $options = array(); - if ( !empty($classname) && is_string($classname) ) - $options['classname'] = $classname; - $params = array_slice(func_get_args(), 2); - $args = array($id, $name, $output_callback, $options); - if ( !empty($params) ) - $args = array_merge($args, $params); - - call_user_func_array('wp_register_sidebar_widget', $args); -} - -/** - * Alias of {@link wp_unregister_sidebar_widget()}. - * - * @see wp_unregister_sidebar_widget() - * - * @since 2.2.0 - * - * @param int|string $id Widget ID. - */ -function unregister_sidebar_widget($id) { - return wp_unregister_sidebar_widget($id); -} - -/** - * Registers widget control callback for customizing options. - * - * Allows $name to be an array that accepts either three elements to grab the - * first element and the third for the name or just uses the first element of - * the array for the name. - * - * Passes to {@link wp_register_widget_control()} after the argument list has - * been compiled. - * - * @since 2.2.0 - * - * @param int|string $name Sidebar ID. - * @param callback $control_callback Widget control callback to display and process form. - * @param int $width Widget width. - * @param int $height Widget height. - */ -function register_widget_control($name, $control_callback, $width = '', $height = '') { - // Compat - if ( is_array($name) ) { - if ( count($name) == 3 ) - $name = sprintf($name[0], $name[2]); - else - $name = $name[0]; - } - - $id = sanitize_title($name); - $options = array(); - if ( !empty($width) ) - $options['width'] = $width; - if ( !empty($height) ) - $options['height'] = $height; - $params = array_slice(func_get_args(), 4); - $args = array($id, $name, $control_callback, $options); - if ( !empty($params) ) - $args = array_merge($args, $params); - - call_user_func_array('wp_register_widget_control', $args); -} - -/** - * Alias of {@link wp_unregister_widget_control()}. + * Output an arbitrary widget as a template tag. * - * @since 2.2.0 - * @see wp_unregister_widget_control() - * - * @param int|string $id Widget ID. - */ -function unregister_widget_control($id) { - return wp_unregister_widget_control($id); -} - -/** - * Output an arbitrary widget as a template tag - * - * @since 2.8 + * @since 2.8.0 * * @param string $widget the widget's PHP class name (see default-widgets.php) * @param array $instance the widget's instance settings @@ -1292,12 +1357,23 @@ function the_widget($widget, $instance = array(), $args = array()) { if ( !is_a($widget_obj, 'WP_Widget') ) return; - $before_widget = sprintf('
    ', $widget_obj->widget_options['classname']); - $default_args = array('before_widget' => $before_widget, 'after_widget' => "
    ", 'before_title' => '

    ', 'after_title' => '

    '); + $before_widget = sprintf('
    ', $widget_obj->widget_options['classname'] ); + $default_args = array( 'before_widget' => $before_widget, 'after_widget' => "
    ", 'before_title' => '

    ', 'after_title' => '

    ' ); $args = wp_parse_args($args, $default_args); $instance = wp_parse_args($instance); + /** + * Fires before rendering the requested widget. + * + * @since 3.0.0 + * + * @param string $widget The widget's class name. + * @param array $instance The current widget instance's settings. + * @param array $args An array of the widget's sidebar arguments. + */ + do_action( 'the_widget', $widget, $instance, $args ); + $widget_obj->_set(-1); $widget_obj->widget($args, $instance); } @@ -1308,3 +1384,131 @@ function the_widget($widget, $instance = array(), $args = array()) { function _get_widget_id_base($id) { return preg_replace( '/-[0-9]+$/', '', $id ); } + +/** + * Handle sidebars config after theme change + * + * @access private + * @since 3.3.0 + */ +function _wp_sidebars_changed() { + global $sidebars_widgets; + + if ( ! is_array( $sidebars_widgets ) ) + $sidebars_widgets = wp_get_sidebars_widgets(); + + retrieve_widgets(true); +} + +/** + * Look for "lost" widgets, this has to run at least on each theme change. + * + * @since 2.8.0 + * + * @param mixed $theme_changed Whether the theme was changed as a boolean. A value + * of 'customize' defers updates for the customizer. + * @return array + */ +function retrieve_widgets( $theme_changed = false ) { + global $wp_registered_sidebars, $sidebars_widgets, $wp_registered_widgets; + + $registered_sidebar_keys = array_keys( $wp_registered_sidebars ); + $orphaned = 0; + + $old_sidebars_widgets = get_theme_mod( 'sidebars_widgets' ); + if ( is_array( $old_sidebars_widgets ) ) { + // time() that sidebars were stored is in $old_sidebars_widgets['time'] + $_sidebars_widgets = $old_sidebars_widgets['data']; + + if ( 'customize' !== $theme_changed ) { + remove_theme_mod( 'sidebars_widgets' ); + } + + foreach ( $_sidebars_widgets as $sidebar => $widgets ) { + if ( 'wp_inactive_widgets' === $sidebar || 'orphaned_widgets' === substr( $sidebar, 0, 16 ) ) { + continue; + } + + if ( !in_array( $sidebar, $registered_sidebar_keys ) ) { + $_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $widgets; + unset( $_sidebars_widgets[$sidebar] ); + } + } + } else { + if ( empty( $sidebars_widgets ) ) + return; + + unset( $sidebars_widgets['array_version'] ); + + $old = array_keys($sidebars_widgets); + sort($old); + sort($registered_sidebar_keys); + + if ( $old == $registered_sidebar_keys ) + return; + + $_sidebars_widgets = array( + 'wp_inactive_widgets' => !empty( $sidebars_widgets['wp_inactive_widgets'] ) ? $sidebars_widgets['wp_inactive_widgets'] : array() + ); + + unset( $sidebars_widgets['wp_inactive_widgets'] ); + + foreach ( $wp_registered_sidebars as $id => $settings ) { + if ( $theme_changed ) { + $_sidebars_widgets[$id] = array_shift( $sidebars_widgets ); + } else { + // no theme change, grab only sidebars that are currently registered + if ( isset( $sidebars_widgets[$id] ) ) { + $_sidebars_widgets[$id] = $sidebars_widgets[$id]; + unset( $sidebars_widgets[$id] ); + } + } + } + + foreach ( $sidebars_widgets as $val ) { + if ( is_array($val) && ! empty( $val ) ) + $_sidebars_widgets['orphaned_widgets_' . ++$orphaned] = $val; + } + } + + // discard invalid, theme-specific widgets from sidebars + $shown_widgets = array(); + + foreach ( $_sidebars_widgets as $sidebar => $widgets ) { + if ( !is_array($widgets) ) + continue; + + $_widgets = array(); + foreach ( $widgets as $widget ) { + if ( isset($wp_registered_widgets[$widget]) ) + $_widgets[] = $widget; + } + + $_sidebars_widgets[$sidebar] = $_widgets; + $shown_widgets = array_merge($shown_widgets, $_widgets); + } + + $sidebars_widgets = $_sidebars_widgets; + unset($_sidebars_widgets, $_widgets); + + // find hidden/lost multi-widget instances + $lost_widgets = array(); + foreach ( $wp_registered_widgets as $key => $val ) { + if ( in_array($key, $shown_widgets, true) ) + continue; + + $number = preg_replace('/.+?-([0-9]+)$/', '$1', $key); + + if ( 2 > (int) $number ) + continue; + + $lost_widgets[] = $key; + } + + $sidebars_widgets['wp_inactive_widgets'] = array_merge($lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets']); + if ( 'customize' !== $theme_changed ) { + wp_set_sidebars_widgets( $sidebars_widgets ); + } + + return $sidebars_widgets; +}