import type { DeepReadonly, ReadonlyStepProps } from "../definition";
import type { AnimationOptions, IndicatorOptions, OverlayOptions, PopoverOptions, ScrollOptions, StepBehavior, StepPropsPatch, TourControls } from "../types";
/**
 * Merges a partial change into step props: fields it leaves out are kept, `data` is merged key by
 * key, `overlay` / `popover` / `indicator` / `behavior` / `controls` go through their option merges,
 * `classNames` is merged per component, and arrays are replaced.
 * Builds a step's initial props over the workflow defaults, and backs `StepPropsStore.update`.
 */
export declare function mergeStepProps<T>(base: StepPropsPatch<T>, patch: StepPropsPatch<T>): ReadonlyStepProps<T>;
export declare function mergeOverlayOptions(defaults?: OverlayOptions, overrides?: OverlayOptions): OverlayOptions | undefined;
export declare function mergeIndicatorOptions(defaults?: IndicatorOptions, overrides?: IndicatorOptions): IndicatorOptions | undefined;
export declare function mergePopoverOptions(defaults?: PopoverOptions, overrides?: PopoverOptions): PopoverOptions | undefined;
export declare function mergeScrollOptions(defaults?: ScrollOptions, overrides?: ScrollOptions): ScrollOptions | undefined;
export declare function mergeAnimationOptions(defaults?: AnimationOptions, overrides?: AnimationOptions): AnimationOptions | undefined;
export declare function mergeStepBehavior(defaults?: StepBehavior, overrides?: StepBehavior): StepBehavior | undefined;
/** Whether a control is enabled, so its button, keys and `overlayClick` may run its command. */
export declare function isControlAvailable(props: {
    readonly controls?: DeepReadonly<TourControls>;
} | undefined, command: "advance" | "previous" | "cancel"): boolean;