import type { LayerEntry, PortalLayerRoot } from '../../contracts/preferences.js';
export interface LayerItem extends LayerEntry {
    id: string;
    /** Return `false` to leave the native Escape event to the caller's own
       handler (transitional: overlays whose root has not wired the stack-close
       action yet). Any other return value consumes the key. */
    onEscape: () => void | boolean;
    /** Element focus returns to on pop; false disables restore. Defaults to the
       element focused when the layer opened (captured by useLayer). */
    restoreFocusTo?: Element | false | null;
    /** false = inert only, no scroll lock (non-blocking modal surfaces). */
    lockScroll?: boolean;
    /** Inert below this layer without a scroll lock (DismissableLayer's
       disableOutsidePointerEvents — the replacement for body inline styles). */
    pointerLockOutside?: boolean;
    /** Outside pointerdown, delivered only while this is the topmost open entry. */
    onPointerDownOutside?: (event: Event) => void;
    /** Outside focusin, delivered only while this is the topmost open entry. */
    onFocusOutside?: (event: FocusEvent) => void;
}
export type LayerItemInput = Omit<LayerItem, 'id'>;
export interface LayerStack {
    push(entry: LayerItemInput): string;
    update(id: string, entry: Partial<LayerItemInput>): void;
    pop(id: string): void;
    top(): LayerItem | undefined;
    depth(id: string): number;
    isTop(id: string): boolean;
    subscribe(listener: () => void): () => void;
    dispose(): void;
}
export declare const createLayerStack: (doc: Document) => LayerStack;
export declare const layerRootForKind: (kind: LayerEntry["kind"]) => PortalLayerRoot;
export declare const layerStackFor: (doc: Document) => LayerStack;
//# sourceMappingURL=LayerStack.d.ts.map