PHPXRef 0.7.1 : WordPress Trunk (Updated Daily) : /wp-includes/blocks/legacy-widget.php source

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   1  <?php
   2  /**
   3   * Server-side rendering of the `core/legacy-widget` block.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * Renders the 'core/legacy-widget' block.
  10   *
  11   * @since 5.8.0
  12   *
  13   * @global int $wp_widget_factory.
  14   *
  15   * @param array $attributes The block attributes.
  16   *
  17   * @return string Rendered block.
  18   */
  19  function render_block_core_legacy_widget( $attributes ) {
  20      global $wp_widget_factory;
  21  
  22      if ( isset( $attributes['id'] ) ) {
  23          $sidebar_id = wp_find_widgets_sidebar( $attributes['id'] );
  24          return wp_render_widget( $attributes['id'], $sidebar_id );
  25      }
  26  
  27      if ( ! isset( $attributes['idBase'] ) ) {
  28          return '';
  29      }
  30  
  31      $id_base       = $attributes['idBase'];
  32      $widget_key    = $wp_widget_factory->get_widget_key( $id_base );
  33      $widget_object = $wp_widget_factory->get_widget_object( $id_base );
  34  
  35      if ( ! $widget_key || ! $widget_object ) {
  36          return '';
  37      }
  38  
  39      if ( isset( $attributes['instance']['encoded'], $attributes['instance']['hash'] ) ) {
  40          $serialized_instance = base64_decode( $attributes['instance']['encoded'] );
  41          if ( ! hash_equals( wp_hash( $serialized_instance ), (string) $attributes['instance']['hash'] ) ) {
  42              return '';
  43          }
  44          $instance = unserialize( $serialized_instance );
  45      } else {
  46          $instance = array();
  47      }
  48  
  49      $args = array(
  50          'widget_id'   => $widget_object->id,
  51          'widget_name' => $widget_object->name,
  52      );
  53  
  54      ob_start();
  55      the_widget( $widget_key, $instance, $args );
  56      return ob_get_clean();
  57  }
  58  
  59  /**
  60   * Registers the 'core/legacy-widget' block.
  61   *
  62   * @since 5.8.0
  63   */
  64  function register_block_core_legacy_widget() {
  65      register_block_type_from_metadata(
  66          __DIR__ . '/legacy-widget',
  67          array(
  68              'render_callback' => 'render_block_core_legacy_widget',
  69          )
  70      );
  71  }
  72  
  73  add_action( 'init', 'register_block_core_legacy_widget' );
  74  
  75  /**
  76   * Intercepts any request with legacy-widget-preview in the query param and, if
  77   * set, renders a page containing a preview of the requested Legacy Widget
  78   * block.
  79   *
  80   * @since 5.8.0
  81   */
  82  function handle_legacy_widget_preview_iframe() {
  83      if ( empty( $_GET['legacy-widget-preview'] ) ) {
  84          return;
  85      }
  86  
  87      if ( ! current_user_can( 'edit_theme_options' ) ) {
  88          return;
  89      }
  90  
  91      define( 'IFRAME_REQUEST', true );
  92  
  93      ?>
  94      <!doctype html>
  95      <html <?php language_attributes(); ?>>
  96      <head>
  97          <meta charset="<?php bloginfo( 'charset' ); ?>" />
  98          <meta name="viewport" content="width=device-width, initial-scale=1" />
  99          <link rel="profile" href="https://gmpg.org/xfn/11" />
 100          <?php wp_head(); ?>
 101          <style>
 102              /* Reset theme styles */
 103              html, body, #page, #content {
 104                  padding: 0 !important;
 105                  margin: 0 !important;
 106              }
 107  
 108              /* Hide root level text nodes */
 109              body {
 110                  font-size: 0 !important;
 111              }
 112  
 113              /* Hide non-widget elements */
 114              body *:not(#page):not(#content):not(.widget):not(.widget *) {
 115                  display: none !important;
 116                  font-size: 0 !important;
 117                  height: 0 !important;
 118                  left: -9999px !important;
 119                  max-height: 0 !important;
 120                  max-width: 0 !important;
 121                  opacity: 0 !important;
 122                  pointer-events: none !important;
 123                  position: absolute !important;
 124                  top: -9999px !important;
 125                  transform: translate(-9999px, -9999px) !important;
 126                  visibility: hidden !important;
 127                  z-index: -999 !important;
 128              }
 129  
 130              /* Restore widget font-size */
 131              .widget {
 132                  font-size: var(--global--font-size-base);
 133              }
 134          </style>
 135      </head>
 136      <body <?php body_class(); ?>>
 137          <div id="page" class="site">
 138              <div id="content" class="site-content">
 139                  <?php
 140                  $registry = WP_Block_Type_Registry::get_instance();
 141                  $block    = $registry->get_registered( 'core/legacy-widget' );
 142                  echo $block->render( $_GET['legacy-widget-preview'] );
 143                  ?>
 144              </div><!-- #content -->
 145          </div><!-- #page -->
 146          <?php wp_footer(); ?>
 147      </body>
 148      </html>
 149      <?php
 150  
 151      exit;
 152  }
 153  
 154  // Use admin_init instead of init to ensure get_current_screen function is already available.
 155  // This isn't strictly required, but enables better compatibility with existing plugins.
 156  // See: https://github.com/WordPress/gutenberg/issues/32624.
 157  add_action( 'admin_init', 'handle_legacy_widget_preview_iframe', 20 );
PHP Cross Reference of WordPress Trunk (Updated Daily)

/wp-includes/blocks/ -> legacy-widget.php (source)
