wp_render_block_visibility_support( string $block_content, array $block ): string

20function wp_render_block_visibility_support( $block_content, $block ) {21	$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );22 23	if ( ! $block_type ) {24		return $block_content;25	}26 27	$block_visibility = $block['attrs']['metadata']['blockVisibility'] ?? null;28 29	// Hide the block whenever the value is boolean false, regardless of the30	// block's current visibility support. This prevents blocks that previously31	// supported visibility from unintentionally appearing on the front end32	// after their support was disabled.33	if ( false === $block_visibility ) {34		return '';35	}36 37	if ( ! block_has_support( $block_type, 'visibility', true ) ) {38		return $block_content;39	}40 41	if ( is_array( $block_visibility ) && ! empty( $block_visibility ) ) {42		$viewport_config = $block_visibility['viewport'] ?? null;43 44		if ( ! is_array( $viewport_config ) || empty( $viewport_config ) ) {45			return $block_content;46		}47		$viewport_settings      = wp_get_global_settings( array( 'viewport' ) );48		$viewport_media_queries = WP_Theme_JSON::get_viewport_media_queries(49			$viewport_settings,50			array(51				'include_desktop' => true,52			)53		);54 55		/*56		 * Viewport media queries are keyed by style-state names (`@mobile`,57		 * `@tablet`, and `@desktop`). Block visibility metadata and generated58		 * classes use plain viewport names, so map the keys at this boundary.59		 */60		$block_visibility_media_queries = array();61		foreach ( $viewport_media_queries as $viewport_state => $media_query ) {62			$block_visibility_media_queries[ ltrim( $viewport_state, '@' ) ] = $media_query;63		}64		$viewport_media_queries = $block_visibility_media_queries;65 66		$hidden_on = array();67 68		// Collect which viewport the block is hidden on (only known viewport sizes).69		foreach ( $viewport_config as $viewport_config_size => $is_visible ) {70			if ( false === $is_visible && isset( $viewport_media_queries[ $viewport_config_size ] ) ) {71				$hidden_on[] = $viewport_config_size;72			}73		}74 75		// If no viewport sizes have visibility set to false, return unchanged.76		if ( empty( $hidden_on ) ) {77			return $block_content;78		}79 80		// Maintain consistent order of viewport sizes for class name generation.81		sort( $hidden_on );82 83		$css_rules   = array();84		$class_names = array();85 86		foreach ( $hidden_on as $hidden_viewport_size ) {87			/*88			 * If these values ever become user-defined,89			 * they should be sanitized and kebab-cased.90			 */91			$visibility_class = 'wp-block-hidden-' . $hidden_viewport_size;92			$class_names[]    = $visibility_class;93			$css_rules[]      = array(94				'selector'     => '.' . $visibility_class,95				'declarations' => array(96					'display' => 'none !important',97				),98				'rules_group'  => $viewport_media_queries[ $hidden_viewport_size ],99			);