--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/blocks/legacy-widget.php Wed Sep 21 18:19:35 2022 +0200
@@ -0,0 +1,134 @@
+<?php
+/**
+ * Server-side rendering of the `core/legacy-widget` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Renders the 'core/legacy-widget' block.
+ *
+ * @param array $attributes The block attributes.
+ *
+ * @return string Rendered block.
+ */
+function render_block_core_legacy_widget( $attributes ) {
+ global $wp_widget_factory;
+
+ if ( isset( $attributes['id'] ) ) {
+ $sidebar_id = wp_find_widgets_sidebar( $attributes['id'] );
+ return wp_render_widget( $attributes['id'], $sidebar_id );
+ }
+
+ if ( ! isset( $attributes['idBase'] ) ) {
+ return '';
+ }
+
+ $id_base = $attributes['idBase'];
+ if ( method_exists( $wp_widget_factory, 'get_widget_key' ) && method_exists( $wp_widget_factory, 'get_widget_object' ) ) {
+ $widget_key = $wp_widget_factory->get_widget_key( $id_base );
+ $widget_object = $wp_widget_factory->get_widget_object( $id_base );
+ } else {
+ /*
+ * This file is copied from the published @wordpress/widgets package when WordPress
+ * Core is built. Because the package is a dependency of both WordPress Core and the
+ * Gutenberg plugin where the block editor is developed, this fallback condition is
+ * required until the minimum required version of WordPress for the plugin is raised
+ * to 5.8.
+ */
+ $widget_key = gutenberg_get_widget_key( $id_base );
+ $widget_object = gutenberg_get_widget_object( $id_base );
+ }
+
+ if ( ! $widget_key || ! $widget_object ) {
+ return '';
+ }
+
+ if ( isset( $attributes['instance']['encoded'], $attributes['instance']['hash'] ) ) {
+ $serialized_instance = base64_decode( $attributes['instance']['encoded'] );
+ if ( wp_hash( $serialized_instance ) !== $attributes['instance']['hash'] ) {
+ return '';
+ }
+ $instance = unserialize( $serialized_instance );
+ } else {
+ $instance = array();
+ }
+
+ $args = array(
+ 'widget_id' => $widget_object->id,
+ 'widget_name' => $widget_object->name,
+ );
+
+ ob_start();
+ the_widget( $widget_key, $instance, $args );
+ return ob_get_clean();
+}
+
+/**
+ * Registers the 'core/legacy-widget' block.
+ */
+function register_block_core_legacy_widget() {
+ register_block_type_from_metadata(
+ __DIR__ . '/legacy-widget',
+ array(
+ 'render_callback' => 'render_block_core_legacy_widget',
+ )
+ );
+}
+
+add_action( 'init', 'register_block_core_legacy_widget' );
+
+/**
+ * Intercepts any request with legacy-widget-preview in the query param and, if
+ * set, renders a page containing a preview of the requested Legacy Widget
+ * block.
+ */
+function handle_legacy_widget_preview_iframe() {
+ if ( empty( $_GET['legacy-widget-preview'] ) ) {
+ return;
+ }
+
+ if ( ! current_user_can( 'edit_theme_options' ) ) {
+ return;
+ }
+
+ define( 'IFRAME_REQUEST', true );
+
+ ?>
+ <!doctype html>
+ <html <?php language_attributes(); ?>>
+ <head>
+ <meta charset="<?php bloginfo( 'charset' ); ?>" />
+ <meta name="viewport" content="width=device-width, initial-scale=1" />
+ <link rel="profile" href="https://gmpg.org/xfn/11" />
+ <?php wp_head(); ?>
+ <style>
+ /* Reset theme styles */
+ html, body, #page, #content {
+ padding: 0 !important;
+ margin: 0 !important;
+ }
+ </style>
+ </head>
+ <body <?php body_class(); ?>>
+ <div id="page" class="site">
+ <div id="content" class="site-content">
+ <?php
+ $registry = WP_Block_Type_Registry::get_instance();
+ $block = $registry->get_registered( 'core/legacy-widget' );
+ echo $block->render( $_GET['legacy-widget-preview'] );
+ ?>
+ </div><!-- #content -->
+ </div><!-- #page -->
+ <?php wp_footer(); ?>
+ </body>
+ </html>
+ <?php
+
+ exit;
+}
+
+// Use admin_init instead of init to ensure get_current_screen function is already available.
+// This isn't strictly required, but enables better compatibility with existing plugins.
+// See: https://github.com/WordPress/gutenberg/issues/32624.
+add_action( 'admin_init', 'handle_legacy_widget_preview_iframe', 20 );