);

		return $post_types;
	}

	/**
	 * Polylang compatibility.
	 *
	 * Fix Polylang compatibility with Elementor.
	 *
	 * @since 2.0.0
	 * @access private
	 * @static
	 */
	private static function polylang_compatibility() {
		// Fix language if the `get_user_locale` is difference from the `get_locale
		if ( isset( $_REQUEST['action'] ) && 0 === strpos( $_REQUEST['action'], 'elementor' ) ) {
			add_action( 'set_current_user', function() {
				global $current_user;
				$current_user->locale = get_locale();
			} );

			// Fix for Polylang
			define( 'PLL_AJAX_ON_FRONT', true );

			add_action( 'pll_pre_init', function( $polylang ) {
				if ( isset( $_REQUEST['post'] ) ) {
					$post_language = $polylang->model->post->get_language( $_REQUEST['post'], 'locale' );
					if ( ! empty( $post_language ) ) {
						$_REQUEST['lang'] = $post_language->locale;
					}
				}
			} );
		}

		// Copy elementor data while polylang creates a translation copy
		add_filter( 'pll_copy_post_metas', [ __CLASS__, 'save_polylang_meta' ], 10, 4 );
	}

	/**
	 * Save polylang meta.
	 *
	 * Copy elementor data while polylang creates a translation copy.
	 *
	 * Fired by `pll_copy_post_metas` filter.
	 *
	 * @since 1.6.0
	 * @access public
	 * @static
	 *
	 * @param array $keys List of custom fields names.
	 * @param bool  $sync True if it is synchronization, false if it is a copy.
	 * @param int   $from ID of the post from which we copy information.
	 * @param int   $to   ID of the post to which we paste information.
	 *
	 * @return array List of custom fields names.
	 */
	public static function save_polylang_meta( $keys, $sync, $from, $to ) {
		// Copy only for a new post.
		if ( ! $sync ) {
			Plugin::$instance->db->copy_elementor_meta( $from, $to );
		}

		return $keys;
	}

	/**
	 * Process post meta before WP importer.
	 *
	 * Normalize Elementor post meta on import, We need the `wp_slash` in order
	 * to avoid the unslashing during the `add_post_meta`.
	 *
	 * Fired by `wp_import_post_meta` filter.
	 *
	 * @since 1.0.0
	 * @access public
	 * @static
	 *
	 * @param array $post_meta Post meta.
	 *
	 * @return array Updated post meta.
	 */
	public static function on_wp_import_post_meta( $post_meta ) {
		$is_wp_importer_before_0_7 = self::is_wp_importer_before_0_7();

		if ( $is_wp_importer_before_0_7 ) {
			foreach ( $post_meta as &$meta ) {
				if ( '_elementor_data' === $meta['key'] ) {
					$meta['value'] = wp_slash( $meta['value'] );
					break;
				}
			}
		}

		return $post_meta;
	}

	/**
	 * Is WP Importer Before 0.7
	 *
	 * Checks if WP Importer is installed, and whether its version is older than 0.7.
	 *
	 * @return bool
	 */
	public static function is_wp_importer_before_0_7() {
		$wp_importer = get_plugins( '/wordpress-importer' );

		if ( ! empty( $wp_importer ) ) {
			$wp_importer_version = $wp_importer['wordpress-importer.php']['Version'];

			if ( version_compare( $wp_importer_version, '0.7', '<' ) ) {
				return true;
			}
		}

		return false;
	}

	/**
	 * Process post meta before WXR importer.
	 *
	 * Normalize Elementor post meta on import with the new WP_importer, We need
	 * the `wp_slash` in order to avoid the unslashing during the `add_post_meta`.
	 *
	 * Fired by `wxr_importer.pre_process.post_meta` filter.
	 *
	 * @since 1.0.0
	 * @access public
	 * @static
	 *
	 * @param array $post_meta Post meta.
	 *
	 * @return array Updated post meta.
	 */
	public static function on_wxr_importer_pre_process_post_meta( $post_meta ) {
		$is_wp_importer_before_0_7 = self::is_wp_importer_before_0_7();

		if ( $is_wp_importer_before_0_7 ) {
			if ( '_elementor_data' === $post_meta['key'] ) {
				$post_meta['value'] = wp_slash( $post_meta['value'] );
			}
		}

		return $post_meta;
	}
}