errors() ) ) { if ( current_filter() === 'template' ) { $theme_path = $wp_theme->get_template(); } else { $theme_path = $wp_theme->get_stylesheet(); } return sanitize_text_field( $theme_path ); } return $current_stylesheet; } /** * Adds a middleware to the REST API to set the theme for the preview. */ function gutenberg_attach_theme_preview_middleware() { // Don't allow non-admins to preview themes. if ( ! current_user_can( 'switch_themes' ) ) { return; } wp_add_inline_script( 'wp-api-fetch', sprintf( 'wp.apiFetch.use( wp.apiFetch.createThemePreviewMiddleware( %s ) );', wp_json_encode( sanitize_text_field( $_GET['wp_theme_preview'] ) ) ), 'after' ); } if ( ! function_exists( 'add_live_preview_button' ) ) { /** * Temporary function to add a live preview button to block themes. * Remove when https://core.trac.wordpress.org/ticket/58190 lands. */ function add_live_preview_button() { global $pagenow; if ( 'themes.php' === $pagenow ) { ?>