diff options
Diffstat (limited to 'wp-includes/blocks/legacy-widget.php')
| -rw-r--r-- | wp-includes/blocks/legacy-widget.php | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/wp-includes/blocks/legacy-widget.php b/wp-includes/blocks/legacy-widget.php new file mode 100644 index 0000000..94cfb9b --- /dev/null +++ b/wp-includes/blocks/legacy-widget.php @@ -0,0 +1,149 @@ +<?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']; + $widget_key = $wp_widget_factory->get_widget_key( $id_base ); + $widget_object = $wp_widget_factory->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 ( ! hash_equals( wp_hash( $serialized_instance ), (string) $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; + } + + /* Hide root level text nodes */ + body { + font-size: 0 !important; + } + + /* Hide non-widget elements */ + body *:not(#page):not(#content):not(.widget):not(.widget *) { + display: none !important; + font-size: 0 !important; + height: 0 !important; + left: -9999px !important; + max-height: 0 !important; + max-width: 0 !important; + opacity: 0 !important; + pointer-events: none !important; + position: absolute !important; + top: -9999px !important; + transform: translate(-9999px, -9999px) !important; + visibility: hidden !important; + z-index: -999 !important; + } + + /* Restore widget font-size */ + .widget { + font-size: var(--global--font-size-base); + } + </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 ); |