import { LayoutMode, RendererStyles } from './renderer';
export interface SpreadViewportMetrics {
    readonly inlineSize: number;
    readonly blockSize?: number;
}
export interface SpreadLayoutOptions {
    readonly margin?: RendererStyles['margin'];
    readonly gap?: RendererStyles['gap'];
    readonly minColumnWidth?: RendererStyles['minColumnWidth'];
    readonly defaultMargin?: number;
    readonly defaultGap?: number;
    readonly defaultMinColumnWidth?: number;
}
export type SpreadNavigationUnit = 'item' | 'spread';
export declare function getSpreadVisibleItemCount(layoutMode: LayoutMode, maxItemCount: number, metrics: SpreadViewportMetrics, options?: SpreadLayoutOptions): number;
export declare function getSpreadItems<T>(items: readonly T[], startIndex: number, visibleItemCount: number): readonly T[];
export declare function getSpreadNavigationStep(visibleItemCount: number, unit: SpreadNavigationUnit): number;
export declare function getNextSpreadIndex(currentIndex: number, itemCount: number, visibleItemCount: number, unit: SpreadNavigationUnit): number | null;
export declare function getPreviousSpreadIndex(currentIndex: number, itemCount: number, visibleItemCount: number, unit: SpreadNavigationUnit): number | null;
export declare function clampSpreadIndex(index: number, itemCount: number): number;
//# sourceMappingURL=spread-layout.d.ts.map