import type { ComputeStepOptions, DistanceCalculator, ESLIncrementalScrollOptions } from './incremental-scroll-types';
/**
 * ESLIncrementalScrollAxisStepper encapsulates per-axis easing/acceleration logic.
 * It receives raw distance to target (signed) and returns incremental delta to apply this frame.
 */
export declare class ESLIncrementalScrollAxisStepper {
    private calcDistance;
    private options;
    protected initialTime: number;
    protected startTime: number;
    protected lastUnstableTime: number;
    protected maxStepIncrement: number;
    constructor(calcDistance: DistanceCalculator, options: ESLIncrementalScrollOptions);
    /**
     * Computes the scroll delta for current animation frame.
     * Returns 0 when target is reached (distance less than 1px).
     * Gradually increases step size for smooth acceleration.
     */
    computeStep(options: ComputeStepOptions): number;
    /** Determines if scrolling should continue. Stops when stability threshold is exceeded or timeout is reached */
    shouldContinueStepping(): boolean;
}