import type { ControlDef, ControlItem } from './types';
/**
 * Add a control, or replace one by reusing its id. Returns the definition so it can be dropped
 * straight into a layout.
 *
 * ```js
 * defineControl({ id: 'print', title: 'Print', icon: '<path d="…"/>', action: () => print() });
 * new Zine(el, { source, controls: { items: ['prev', 'next', 'print'] } });
 * ```
 */
export declare function defineControl(def: ControlDef): ControlDef;
/** Look up a registered control. */
export declare function getControl(id: string): ControlDef | undefined;
/**
 * Turn a layout entry into a concrete definition. A bare string names a registered control; an
 * object with only some fields is layered over the registered one, so `{ id: 'next', title: 'Go
 * on' }` relabels the built-in without reimplementing it.
 */
export declare function resolveControl(item: ControlItem): ControlDef;
/** The toolbar shown when `items` is not given. */
export declare const DEFAULT_ITEMS: readonly ControlItem[];