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/wp-includes/blocks/ -> gallery.php (source)

   1  <?php
   2  /**
   3   * Server-side rendering of the `core/gallery` block.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * Handles backwards compatibility for Gallery Blocks,
  10   * whose images feature a `data-id` attribute.
  11   *
  12   * Now that the Gallery Block contains inner Image Blocks,
  13   * we add a custom `data-id` attribute before rendering the gallery
  14   * so that the Image Block can pick it up in its render_callback.
  15   *
  16   * @since 5.9.0
  17   *
  18   * @param array $parsed_block The block being rendered.
  19   * @return array The migrated block object.
  20   */
  21  function block_core_gallery_data_id_backcompatibility( $parsed_block ) {
  22      if ( 'core/gallery' === $parsed_block['blockName'] ) {
  23          foreach ( $parsed_block['innerBlocks'] as $key => $inner_block ) {
  24              if ( 'core/image' === $inner_block['blockName'] ) {
  25                  if ( ! isset( $parsed_block['innerBlocks'][ $key ]['attrs']['data-id'] ) && isset( $inner_block['attrs']['id'] ) ) {
  26                      $parsed_block['innerBlocks'][ $key ]['attrs']['data-id'] = esc_attr( $inner_block['attrs']['id'] );
  27                  }
  28              }
  29          }
  30      }
  31  
  32      return $parsed_block;
  33  }
  34  
  35  add_filter( 'render_block_data', 'block_core_gallery_data_id_backcompatibility' );
  36  
  37  /**
  38   * Adds a unique ID to the gallery block context.
  39   *
  40   * @since 7.0.0
  41   *
  42   * @param array $context      Default context.
  43   * @param array $parsed_block Block being rendered, filtered by render_block_data.
  44   * @return array Filtered context.
  45   */
  46  function block_core_gallery_render_context( $context, $parsed_block ) {
  47      if ( 'core/gallery' === $parsed_block['blockName'] ) {
  48          $context['galleryId'] = uniqid();
  49      }
  50      return $context;
  51  }
  52  
  53  add_filter( 'render_block_context', 'block_core_gallery_render_context', 10, 2 );
  54  
  55  /**
  56   * Returns the column gap value used for Gallery image width calculations.
  57   *
  58   * @since 7.1.0
  59   *
  60   * @param string|array|null $gap          Gallery block gap value.
  61   * @param string            $fallback_gap Fallback gap value.
  62   * @return string Gallery column gap value.
  63   */
  64  function block_core_gallery_get_column_gap_value( $gap, $fallback_gap ) {
  65      if ( is_array( $gap ) ) {
  66          $gap = $gap['left'] ?? $fallback_gap;
  67      }
  68  
  69      // Make sure $gap is a string to avoid PHP 8.1 deprecation error in preg_match() when the value is null.
  70      $gap = is_string( $gap ) ? $gap : '';
  71  
  72      // Skip if gap value contains unsupported characters.
  73      // Regex for CSS value borrowed from `safecss_filter_attr`, and used here
  74      // because we only want to match against the value, not the CSS attribute.
  75      $gap = $gap && preg_match( '%[\\\(&=}]|/\*%', $gap ) ? null : $gap;
  76  
  77      // Get spacing CSS variable from preset value if provided.
  78      if ( is_string( $gap ) && str_contains( $gap, 'var:preset|spacing|' ) ) {
  79          $index_to_splice = strrpos( $gap, '|' ) + 1;
  80          $slug            = _wp_to_kebab_case( substr( $gap, $index_to_splice ) );
  81          $gap             = "var(--wp--preset--spacing--$slug)";
  82      }
  83  
  84      $gap_column = ( null !== $gap && '' !== $gap ) ? $gap : $fallback_gap;
  85  
  86      // The unstable gallery gap calculation requires a real value (such as `0px`) and not `0`.
  87      return '0' === $gap_column ? '0px' : $gap_column;
  88  }
  89  
  90  /**
  91   * Resolves a Gallery block's `dynamicContent` to an ordered list of image
  92   * attachment IDs.
  93   *
  94   * The `source` key is the dispatch discriminator and `args` holds the source's
  95   * parameters. This `{ source, args }` shape mirrors the Block Bindings metadata
  96   * shape so dynamic mode can migrate to an `innerBlocks` binding with minimal
  97   * change. `core/attached-media` is a context-relative anchor (the post the gallery is
  98   * rendered within); future sources translate their REST-named `args` (`author`,
  99   * `categories`, `after`/`before`, `media_type`, etc.) into `WP_Query` arguments
 100   * here.
 101   *
 102   * @since 7.0.0
 103   *
 104   * @param array    $source The gallery's `dynamicContent` attribute.
 105   * @param WP_Block $block  The gallery block instance being rendered.
 106   * @return int[] Ordered list of image attachment IDs.
 107   */
 108  function block_core_gallery_resolve_dynamic_source( $source, $block ) {
 109      if ( ! is_array( $source ) ) {
 110          return array();
 111      }
 112  
 113      $source_name = $source['source'] ?? null;
 114      $args        = isset( $source['args'] ) && is_array( $source['args'] ) ? $source['args'] : array();
 115  
 116      switch ( $source_name ) {
 117          case 'core/attached-media':
 118              // Prefer the post supplied via block context, falling back to the post
 119              // being rendered. The fallback is what lets a post-bound template (e.g.
 120              // `single`/`page`) resolve against the actual post at render time even
 121              // though the editor has no concrete post to preview — the editor gates
 122              // the dynamic-mode UI on that same context (see `use-dynamic-gallery.js`).
 123              $post_id = $block->context['postId'] ?? get_the_ID();
 124              if ( ! $post_id ) {
 125                  return array();
 126              }
 127  
 128              // Map the camelCase `args` (block-attribute convention) to WP_Query
 129              // names, defaulting to the same order as the editor preview (see
 130              // `dynamic-source.js`). Only REST-supported orderby values are
 131              // allowed; `menu_order` is intentionally unsupported (it isn't a
 132              // valid media REST `orderby`).
 133              $orderby = $args['orderBy'] ?? 'date';
 134              if ( ! in_array( $orderby, array( 'date', 'title' ), true ) ) {
 135                  $orderby = 'date';
 136              }
 137              $order = strtoupper( $args['order'] ?? 'desc' ) === 'ASC' ? 'ASC' : 'DESC';
 138  
 139              // Bound the number of resolved images until the gallery supports
 140              // pagination. Kept in sync with the editor query's `per_page` cap; a
 141              // case-insensitive grep for `max_images` finds both this and
 142              // `MAX_IMAGES` in `dynamic-source.js`.
 143              $max_images = 100;
 144  
 145              $query = new WP_Query(
 146                  array(
 147                      'post_parent'    => $post_id,
 148                      'post_type'      => 'attachment',
 149                      'post_status'    => 'inherit',
 150                      'post_mime_type' => 'image',
 151                      'orderby'        => $orderby,
 152                      'order'          => $order,
 153                      'posts_per_page' => $max_images,
 154                      'fields'         => 'ids',
 155                      'no_found_rows'  => true,
 156                  )
 157              );
 158  
 159              return array_map( 'intval', $query->posts );
 160      }
 161  
 162      // Unknown or not-yet-implemented source type.
 163      return array();
 164  }
 165  
 166  /**
 167   * Builds the link-related image block attributes for a dynamically rendered
 168   * gallery image, mapping the gallery-wide `linkTo` setting onto a single image.
 169   *
 170   * Mirrors the editor's `getHrefAndDestination()` (see `gallery/utils.js`).
 171   *
 172   * @since 7.0.0
 173   *
 174   * @param int   $attachment_id The image attachment ID.
 175   * @param array $attributes    The gallery block attributes.
 176   * @return array Partial image block attributes (`href`, `linkDestination`,
 177   *               `linkTarget`, `rel`, `lightbox`).
 178   */
 179  function block_core_gallery_dynamic_image_link_attributes( $attachment_id, $attributes ) {
 180      $link_to = $attributes['linkTo'] ?? 'none';
 181      $attrs   = array();
 182  
 183      switch ( $link_to ) {
 184          // Gutenberg uses 'media'/'attachment'; WP Core uses 'file'/'post'.
 185          case 'media':
 186          case 'file':
 187              $attrs['href']            = wp_get_attachment_url( $attachment_id );
 188              $attrs['linkDestination'] = 'media';
 189              break;
 190          case 'attachment':
 191          case 'post':
 192              $attrs['href']            = get_attachment_link( $attachment_id );
 193              $attrs['linkDestination'] = 'attachment';
 194              break;
 195          case 'lightbox':
 196              $attrs['linkDestination'] = 'none';
 197              $attrs['lightbox']        = array( 'enabled' => true );
 198              break;
 199      }
 200  
 201      if ( ! empty( $attrs['href'] ) && '_blank' === ( $attributes['linkTarget'] ?? '' ) ) {
 202          $attrs['linkTarget'] = '_blank';
 203          $attrs['rel']        = 'noopener';
 204      }
 205  
 206      return $attrs;
 207  }
 208  
 209  /**
 210   * Renders a single `core/image` block for a Gallery block running in dynamic
 211   * mode, applying the gallery-wide settings that affect how an image renders.
 212   *
 213   * The image markup is generated here (via `wp_get_attachment_image()`) and
 214   * rendered through a real `core/image` block instance so that the image block's
 215   * own render callback and lightbox behavior run, and so the gallery's existing
 216   * lightbox/interactivity post-processing can pick it up.
 217   *
 218   * @since 7.0.0
 219   *
 220   * @param int   $attachment_id The image attachment ID.
 221   * @param array $attributes    The gallery block attributes.
 222   * @param array $context       Context to expose to the inner image block.
 223   * @return string The rendered image block HTML, or an empty string on failure.
 224   */
 225  function block_core_gallery_render_dynamic_image( $attachment_id, $attributes, $context ) {
 226      $size_slug    = $attributes['sizeSlug'] ?? 'large';
 227      $aspect_ratio = $attributes['aspectRatio'] ?? 'auto';
 228  
 229      $img_attr = array( 'class' => 'wp-image-' . $attachment_id );
 230      if ( $aspect_ratio && 'auto' !== $aspect_ratio ) {
 231          // Run the aspect ratio through the same sanitization used for every other
 232          // block inline style, so an unsafe value can't break out of the style
 233          // attribute or inject additional markup.
 234          $img_attr['style'] = safecss_filter_attr(
 235              sprintf( 'aspect-ratio:%s;object-fit:cover;', $aspect_ratio )
 236          );
 237      }
 238  
 239      $image_markup = wp_get_attachment_image( $attachment_id, $size_slug, false, $img_attr );
 240      if ( ! $image_markup ) {
 241          return '';
 242      }
 243  
 244      $image_attributes = array_merge(
 245          array(
 246              'id'       => $attachment_id,
 247              'data-id'  => (string) $attachment_id,
 248              'sizeSlug' => $size_slug,
 249          ),
 250          block_core_gallery_dynamic_image_link_attributes( $attachment_id, $attributes )
 251      );
 252  
 253      if ( $aspect_ratio && 'auto' !== $aspect_ratio ) {
 254          $image_attributes['aspectRatio'] = $aspect_ratio;
 255          $image_attributes['scale']       = 'cover';
 256      }
 257  
 258      // Wrap in a link when the gallery links images somewhere.
 259      if ( ! empty( $image_attributes['href'] ) ) {
 260          $image_markup = sprintf(
 261              '<a href="%1$s"%2$s%3$s>%4$s</a>',
 262              esc_url( $image_attributes['href'] ),
 263              isset( $image_attributes['linkTarget'] ) ? ' target="' . esc_attr( $image_attributes['linkTarget'] ) . '"' : '',
 264              isset( $image_attributes['rel'] ) ? ' rel="' . esc_attr( $image_attributes['rel'] ) . '"' : '',
 265              $image_markup
 266          );
 267      }
 268  
 269      // Use the raw caption (`post_excerpt`) so the frontend mirrors the editor
 270      // preview, which builds the caption from the REST `caption.raw` value. Gap:
 271      // the REST API exposes no caption run through `wp_get_attachment_caption`, so
 272      // that filter isn't applied here either.
 273      $attachment = get_post( $attachment_id );
 274      $caption    = $attachment ? $attachment->post_excerpt : '';
 275      if ( '' !== $caption ) {
 276          $image_markup .= sprintf(
 277              '<figcaption class="wp-element-caption">%s</figcaption>',
 278              wp_kses_post( $caption )
 279          );
 280      }
 281  
 282      $figure = sprintf(
 283          '<figure class="wp-block-image size-%1$s">%2$s</figure>',
 284          esc_attr( $size_slug ),
 285          $image_markup
 286      );
 287  
 288      $image_block = array(
 289          'blockName'    => 'core/image',
 290          'attrs'        => $image_attributes,
 291          'innerBlocks'  => array(),
 292          'innerHTML'    => $figure,
 293          'innerContent' => array( $figure ),
 294      );
 295  
 296      return ( new WP_Block( $image_block, $context ) )->render();
 297  }
 298  
 299  /**
 300   * Renders the `core/gallery` block on the server.
 301   *
 302   * @since 6.0.0
 303   *
 304   * @param array  $attributes Attributes of the block being rendered.
 305   * @param string $content    Content of the block being rendered.
 306   * @param array  $block      The block instance being rendered.
 307   * @return string The content of the block being rendered.
 308   */
 309  function block_core_gallery_render( $attributes, $content, $block ) {
 310      static $global_styles = null;
 311  
 312      // In dynamic mode the gallery's images are resolved at render time instead of
 313      // being authored as inner blocks, so `save.js` persists at most the
 314      // gallery-level caption — a bare `<figcaption>`, or nothing when there is no
 315      // caption. Resolve the configured source to a list of attachments, render an
 316      // image block for each, and build the gallery `<figure>` wrapper from scratch.
 317      // The gap/randomOrder/lightbox post-processing below then runs over the
 318      // constructed markup unchanged.
 319      if ( ! empty( $attributes['dynamicContent'] ) ) {
 320          $attachment_ids = block_core_gallery_resolve_dynamic_source( $attributes['dynamicContent'], $block );
 321  
 322          // Nothing resolved — no attachments, or an unrecognized source. Render
 323          // nothing rather than an empty gallery wrapper; a saved caption is
 324          // meaningless without images, so it is intentionally dropped too.
 325          if ( empty( $attachment_ids ) ) {
 326              return '';
 327          }
 328  
 329          // The source query only fetched IDs (`fields => ids`), which skips
 330          // WP_Query's cache priming. Each image rendered below reads the
 331          // attachment post and its meta (via `wp_get_attachment_image()`,
 332          // `get_post()`, etc.), so warm the post and meta caches in a single pair
 333          // of queries up front instead of paying ~two queries per attachment.
 334          // Term cache is left cold: the render path doesn't read attachment terms.
 335          if ( count( $attachment_ids ) > 1 ) {
 336              _prime_post_caches( $attachment_ids, false, true );
 337          }
 338  
 339          // Expose the gallery's provided context (plus galleryId/postId/postType)
 340          // to each image block, since these images are rendered outside the
 341          // gallery's real inner-block tree.
 342          $image_context = array_merge(
 343              is_array( $block->context ) ? $block->context : array(),
 344              array(
 345                  'allowResize'          => $attributes['allowResize'] ?? false,
 346                  'imageCrop'            => $attributes['imageCrop'] ?? true,
 347                  'fixedHeight'          => $attributes['fixedHeight'] ?? true,
 348                  'navigationButtonType' => $attributes['navigationButtonType'] ?? 'icon',
 349              )
 350          );
 351  
 352          $images_markup = '';
 353          foreach ( $attachment_ids as $attachment_id ) {
 354              $images_markup .= block_core_gallery_render_dynamic_image( $attachment_id, $attributes, $image_context );
 355          }
 356  
 357          // Build the wrapper rather than parsing/splicing saved markup.
 358          // `get_block_wrapper_attributes()` supplies the block-support
 359          // classes/styles (align, color, border, spacing, anchor id); the layout
 360          // render filter adds the flex layout classes downstream — the same way a
 361          // static gallery's wrapper is composed (`useBlockProps.save()` plus that
 362          // filter). Only the gallery-specific classes are added explicitly, and
 363          // they mirror `save.js` (kept in sync deliberately — see that file).
 364          $gallery_classes  = 'wp-block-gallery has-nested-images';
 365          $gallery_classes .= isset( $attributes['columns'] )
 366              ? ' columns-' . (int) $attributes['columns']
 367              : ' columns-default';
 368          if ( $attributes['imageCrop'] ?? true ) {
 369              $gallery_classes .= ' is-cropped';
 370          }
 371          $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $gallery_classes ) );
 372  
 373          // In dynamic mode `save.js` persists only the gallery-level caption, so
 374          // `$content` is the saved `<figcaption>` (or empty). Append it after the
 375          // resolved images — matching the static gallery's `{images}{caption}`
 376          // order — without parsing it.
 377          $content = sprintf( '<figure %s>%s%s</figure>', $wrapper_attributes, $images_markup, $content );
 378      }
 379  
 380      // Adds a style tag for the --wp--style--unstable-gallery-gap var.
 381      // The Gallery block needs to recalculate Image block width based on
 382      // the current gap setting in order to maintain the number of flex columns
 383      // so a css var is added to allow this.
 384  
 385      $style_attr = is_array( $attributes['style'] ?? null )
 386          ? $attributes['style']
 387          : array();
 388      if (
 389          defined( 'IS_GUTENBERG_PLUGIN' ) &&
 390          IS_GUTENBERG_PLUGIN &&
 391          function_exists( 'gutenberg_resolve_style_state_aliases' )
 392      ) {
 393          $style_attr = gutenberg_resolve_style_state_aliases( $style_attr, 'core/gallery' );
 394      }
 395  
 396      $unique_gallery_classname = wp_unique_id( 'wp-block-gallery-' );
 397      $processed_content        = new WP_HTML_Tag_Processor( $content );
 398      $processed_content->next_tag();
 399      $processed_content->add_class( $unique_gallery_classname );
 400  
 401      // --gallery-block--gutter-size is deprecated. --wp--style--gallery-gap-default should be used by themes that want to set a default
 402      // gap on the gallery.
 403      $fallback_gap = 'var( --wp--style--gallery-gap-default, var( --gallery-block--gutter-size, var( --wp--style--block-gap, 0.5em ) ) )';
 404  
 405      if ( null === $global_styles ) {
 406          $global_styles = function_exists( 'wp_get_global_styles' ) ? wp_get_global_styles() : array();
 407      }
 408  
 409      $global_gallery_styles = $global_styles['blocks']['core/gallery'] ?? array();
 410      $global_gallery_gap    = $global_gallery_styles['spacing']['blockGap'] ?? $fallback_gap;
 411      $has_block_gap         = is_array( $style_attr['spacing'] ?? null ) && array_key_exists( 'blockGap', $style_attr['spacing'] );
 412      // Prefer the block's own gap value, then Gallery global styles. Missing
 413      // values fall back to the Gallery blockGap default.
 414      $block_gap  = $has_block_gap
 415          ? $style_attr['spacing']['blockGap']
 416          : $global_gallery_gap;
 417      $gap_column = block_core_gallery_get_column_gap_value( $block_gap, $fallback_gap );
 418  
 419      // Set the CSS variable to the column value for Gallery's flex width calculations.
 420      $gallery_styles = array(
 421          array(
 422              'selector'     => ".wp-block-gallery.{$unique_gallery_classname}",
 423              'declarations' => array(
 424                  '--wp--style--unstable-gallery-gap' => $gap_column,
 425              ),
 426          ),
 427      );
 428  
 429      $global_settings          = wp_get_global_settings();
 430      $viewport_settings        = $global_settings['viewport'] ?? null;
 431      $responsive_media_queries = array();
 432      foreach ( array( 'WP_Theme_JSON_Gutenberg', 'WP_Theme_JSON' ) as $theme_json_class_name ) {
 433          if ( method_exists( $theme_json_class_name, 'get_viewport_media_queries' ) ) {
 434              $responsive_media_queries = $theme_json_class_name::get_viewport_media_queries( $viewport_settings );
 435              break;
 436          }
 437      }
 438  
 439      foreach ( $responsive_media_queries as $breakpoint => $media_query ) {
 440          $viewport_style                = $style_attr[ $breakpoint ] ?? null;
 441          $has_viewport_block_gap        = is_array( $viewport_style ) &&
 442              is_array( $viewport_style['spacing'] ?? null ) &&
 443              array_key_exists( 'blockGap', $viewport_style['spacing'] );
 444          $has_global_viewport_block_gap = is_array( $global_gallery_styles[ $breakpoint ]['spacing'] ?? null ) &&
 445              array_key_exists( 'blockGap', $global_gallery_styles[ $breakpoint ]['spacing'] );
 446  
 447          // Viewport-specific block values win. Gallery global viewport values
 448          // only apply when the block has no base gap, so they do not override an instance value.
 449          if ( $has_viewport_block_gap ) {
 450              $viewport_gap = $viewport_style['spacing']['blockGap'];
 451          } elseif ( ! $has_block_gap && $has_global_viewport_block_gap ) {
 452              $viewport_gap = $global_gallery_styles[ $breakpoint ]['spacing']['blockGap'];
 453          } else {
 454              continue;
 455          }
 456  
 457          if ( null === $viewport_gap ) {
 458              continue;
 459          }
 460  
 461          $gallery_styles[] = array(
 462              'selector'     => ".wp-block-gallery.{$unique_gallery_classname}",
 463              'declarations' => array(
 464                  '--wp--style--unstable-gallery-gap' => block_core_gallery_get_column_gap_value(
 465                      $viewport_gap,
 466                      $fallback_gap
 467                  ),
 468              ),
 469              'rules_group'  => $media_query,
 470          );
 471      }
 472  
 473      wp_style_engine_get_stylesheet_from_css_rules(
 474          $gallery_styles,
 475          array( 'context' => 'block-supports' )
 476      );
 477  
 478      // The WP_HTML_Tag_Processor class calls get_updated_html() internally
 479      // when the instance is treated as a string, but here we explicitly
 480      // convert it to a string.
 481      $updated_content = $processed_content->get_updated_html();
 482  
 483      /*
 484       * Randomize the order of image blocks. Ideally we should shuffle
 485       * the `$parsed_block['innerBlocks']` via the `render_block_data` hook.
 486       * However, this hook doesn't apply inner block updates when blocks are
 487       * nested.
 488       * @todo In the future, if this hook supports updating innerBlocks in
 489       * nested blocks, it should be refactored.
 490       *
 491       * @see: https://github.com/WordPress/gutenberg/pull/58733
 492       */
 493      if ( ! empty( $attributes['randomOrder'] ) ) {
 494          // This pattern matches figure elements with the `wp-block-image`
 495          // class to avoid the gallery's wrapping `figure` element and
 496          // extract images only.
 497          $pattern = '/<figure[^>]*\bwp-block-image\b[^>]*>.*?<\/figure>/s';
 498  
 499          preg_match_all( $pattern, $updated_content, $matches );
 500          if ( $matches ) {
 501              $image_blocks = $matches[0];
 502              shuffle( $image_blocks );
 503  
 504              $i               = 0;
 505              $updated_content = preg_replace_callback(
 506                  $pattern,
 507                  static function () use ( $image_blocks, &$i ) {
 508                      return $image_blocks[ $i++ ];
 509                  },
 510                  $updated_content
 511              );
 512          }
 513      }
 514  
 515      // Gets all image IDs from the state that match this gallery's ID.
 516      $state      = wp_interactivity_state( 'core/image' );
 517      $gallery_id = $block->context['galleryId'] ?? null;
 518      $image_ids  = array();
 519  
 520      // Extracts image IDs from state metadata that match the current gallery ID.
 521      if ( isset( $gallery_id ) && isset( $state['metadata'] ) ) {
 522          foreach ( $state['metadata'] as $image_id => $metadata ) {
 523              if ( isset( $metadata['galleryId'] ) && $metadata['galleryId'] === $gallery_id ) {
 524                  $image_ids[] = $image_id;
 525              }
 526          }
 527      }
 528  
 529      // If there are image IDs associated with this gallery, set interactivity
 530      // attributes and order metadata for lightbox navigation.
 531      if ( ! empty( $image_ids ) ) {
 532          $total          = count( $image_ids );
 533          $lightbox_index = 0;
 534          $processor      = new WP_HTML_Tag_Processor( $updated_content );
 535          $processor->next_tag();
 536          $processor->set_attribute( 'data-wp-interactive', 'core/gallery' );
 537          $processor->set_attribute(
 538              'data-wp-context',
 539              wp_json_encode(
 540                  array( 'galleryId' => $gallery_id ),
 541                  JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP
 542              )
 543          );
 544          while ( $processor->next_tag( 'figure' ) ) {
 545              $wp_key = $processor->get_attribute( 'data-wp-key' );
 546              if ( $wp_key && isset( $state['metadata'][ $wp_key ] ) ) {
 547                  $alt = $state['metadata'][ $wp_key ]['alt'];
 548                  wp_interactivity_state(
 549                      'core/image',
 550                      array(
 551                          'metadata' => array(
 552                              $wp_key => array(
 553                                  'customAriaLabel'        => empty( $alt )
 554                                      /* translators: %1$s: current image index, %2$s: total number of images */
 555                                      ? sprintf( __( 'Enlarged image %1$s of %2$s' ), $lightbox_index + 1, $total )
 556                                      /* translators: %1$s: current image index, %2$s: total number of images, %3$s: Image alt text */
 557                                      : sprintf( __( 'Enlarged image %1$s of %2$s: %3$s' ), $lightbox_index + 1, $total, $alt ),
 558                                  /* translators: %1$s: current image index, %2$s: total number of images */
 559                                  'triggerButtonAriaLabel' => sprintf( __( 'Enlarge %1$s of %2$s' ), $lightbox_index + 1, $total ),
 560                                  'order'                  => $lightbox_index,
 561                              ),
 562                          ),
 563                      )
 564                  );
 565                  ++$lightbox_index;
 566              }
 567          }
 568          return $processor->get_updated_html();
 569      }
 570  
 571      return $updated_content;
 572  }
 573  
 574  /**
 575   * Registers the `core/gallery` block on server.
 576   *
 577   * @since 5.9.0
 578   */
 579  function register_block_core_gallery() {
 580      register_block_type_from_metadata(
 581          __DIR__ . '/gallery',
 582          array(
 583              'render_callback' => 'block_core_gallery_render',
 584          )
 585      );
 586  }
 587  
 588  add_action( 'init', 'register_block_core_gallery' );


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