import { Evented } from 'apprt-core/Events';

/**
 * @module api
 */

/**
 * Interface for the history service (reference `"mapnavigation.History"`).
 */
interface History extends Evented<{
    update: void;
}> {
    /**
     * True if `undo()` can be called at least once.
     */
    readonly canUndo: boolean;
    /**
     * True if `redo()` can be called at least once
     */
    readonly canRedo: boolean;
    /**
     * Moves back to the last state, or does nothing if there is no such state.
     */
    undo(): void;
    /**
     * Advances to the next state, or does nothing if there is no such state.
     */
    redo(): void;
}

export type { History };