WP_Theme_JSON::get_styles_for_block( array $block_metadata ): string

2843	public function get_styles_for_block( $block_metadata ) {2844		$node                 = _wp_array_get( $this->theme_json, $block_metadata['path'], array() );2845		$use_root_padding     = isset( $this->theme_json['settings']['useRootPaddingAwareAlignments'] ) && true === $this->theme_json['settings']['useRootPaddingAwareAlignments'];2846		$selector             = $block_metadata['selector'];2847		$settings             = isset( $this->theme_json['settings'] ) ? $this->theme_json['settings'] : array();2848		$feature_declarations = static::get_feature_declarations_for_node( $block_metadata, $node );2849		$is_root_selector     = static::ROOT_BLOCK_SELECTOR === $selector;2850 2851		// If there are style variations, generate the declarations for them, including any feature selectors the block may have.2852		$style_variation_declarations = array();2853		$style_variation_custom_css   = array();2854		if ( ! empty( $block_metadata['variations'] ) ) {2855			foreach ( $block_metadata['variations'] as $style_variation ) {2856				$style_variation_node           = _wp_array_get( $this->theme_json, $style_variation['path'], array() );2857				$clean_style_variation_selector = trim( $style_variation['selector'] );2858 2859				// Generate any feature/subfeature style declarations for the current style variation.2860				$variation_declarations = static::get_feature_declarations_for_node( $block_metadata, $style_variation_node );2861 2862				// Combine selectors with style variation's selector and add to overall style variation declarations.2863				foreach ( $variation_declarations as $current_selector => $new_declarations ) {2864					/*2865					 * Clean up any whitespace between comma separated selectors.2866					 * This prevents these spaces breaking compound selectors such as:2867					 * - `.wp-block-list:not(.wp-block-list .wp-block-list)`2868					 * - `.wp-block-image img, .wp-block-image.my-class img`2869					 */2870					$clean_current_selector = preg_replace( '/,\s+/', ',', $current_selector );2871					$shortened_selector     = str_replace( $block_metadata['selector'], '', $clean_current_selector );2872 2873					// Prepend the variation selector to the current selector.2874					$split_selectors    = explode( ',', $shortened_selector );2875					$updated_selectors  = array_map(2876						static function ( $split_selector ) use ( $clean_style_variation_selector ) {2877							return $clean_style_variation_selector . $split_selector;2878						},2879						$split_selectors2880					);2881					$combined_selectors = implode( ',', $updated_selectors );2882 2883					// Add the new declarations to the overall results under the modified selector.2884					$style_variation_declarations[ $combined_selectors ] = $new_declarations;2885				}2886 2887				// Compute declarations for remaining styles not covered by feature level selectors.2888				$style_variation_declarations[ $style_variation['selector'] ] = static::compute_style_properties( $style_variation_node, $settings, null, $this->theme_json );2889				// Store custom CSS for the style variation.2890				if ( isset( $style_variation_node['css'] ) ) {2891					$style_variation_custom_css[ $style_variation['selector'] ] = $this->process_blocks_custom_css( $style_variation_node['css'], $style_variation['selector'] );2892				}2893			}2894		}2895		/*2896		 * Get a reference to element name from path.2897		 * $block_metadata['path'] = array( 'styles','elements','link' );2898		 * Make sure that $block_metadata['path'] describes an element node, like [ 'styles', 'element', 'link' ].2899		 * Skip non-element paths like just ['styles'].2900		 */2901		$is_processing_element = in_array( 'elements', $block_metadata['path'], true );2902 2903		$current_element = $is_processing_element ? $block_metadata['path'][ count( $block_metadata['path'] ) - 1 ] : null;2904 2905		$element_pseudo_allowed = array();2906 2907		if ( isset( $current_element, static::VALID_ELEMENT_PSEUDO_SELECTORS[ $current_element ] ) ) {2908			$element_pseudo_allowed = static::VALID_ELEMENT_PSEUDO_SELECTORS[ $current_element ];2909		}2910 2911		/*2912		 * Check for allowed pseudo classes (e.g. ":hover") from the $selector ("a:hover").2913		 * This also resets the array keys.2914		 */2915		$pseudo_matches = array_values(2916			array_filter(2917				$element_pseudo_allowed,2918				static function ( $pseudo_selector ) use ( $selector ) {2919					/*2920					 * Check if the pseudo selector is in the current selector,2921					 * ensuring it is not followed by a dash (e.g., :focus should not match :focus-visible).2922					 */