WP_Theme_JSON_Resolver::translate( array $theme_json, string $domain = 'default' )

Source

File: wp-includes/class-wp-theme-json-resolver.php

private static function translate( $theme_json, $domain = 'default' ) {
		$fields = self::get_fields_to_translate();
		foreach ( $fields as $field ) {
			$path    = $field['path'];
			$key     = $field['key'];
			$context = $field['context'];

			/*
			 * We need to process the paths that include '*' separately.
			 * One example of such a path would be:
			 * [ 'settings', 'blocks', '*', 'color', 'palette' ]
			 */
			$nodes_to_iterate = array_keys( $path, '*', true );
			if ( ! empty( $nodes_to_iterate ) ) {
				/*
				 * At the moment, we only need to support one '*' in the path, so take it directly.
				 * - base will be [ 'settings', 'blocks' ]
				 * - data will be [ 'color', 'palette' ]
				 */
				$base_path = array_slice( $path, 0, $nodes_to_iterate[0] );
				$data_path = array_slice( $path, $nodes_to_iterate[0] + 1 );
				$base_tree = _wp_array_get( $theme_json, $base_path, array() );
				foreach ( $base_tree as $node_name => $node_data ) {
					$array_to_translate = _wp_array_get( $node_data, $data_path, null );
					if ( is_null( $array_to_translate ) ) {
						continue;
					}

					// Whole path will be [ 'settings', 'blocks', 'core/paragraph', 'color', 'palette' ].
					$whole_path       = array_merge( $base_path, array( $node_name ), $data_path );
					$translated_array = self::translate_theme_json_chunk( $array_to_translate, $key, $context, $domain );
					_wp_array_set( $theme_json, $whole_path, $translated_array );
				}
			} else {
				$array_to_translate = _wp_array_get( $theme_json, $path, null );
				if ( is_null( $array_to_translate ) ) {
					continue;
				}

				$translated_array = self::translate_theme_json_chunk( $array_to_translate, $key, $context, $domain );
				_wp_array_set( $theme_json, $path, $translated_array );
			}
		}

		return $theme_json;
	}