/**
 * Height Measurement Cache
 * Dynamically measures and caches item heights for variable height support
 */
export interface HeightCacheEntry {
    height: number;
    measured: boolean;
    timestamp: number;
}
export interface HeightCacheStats {
    totalItems: number;
    measuredItems: number;
    estimatedItems: number;
    cacheSize: number;
    hitRate: number;
}
export declare class HeightMeasurementCache {
    private heightMap;
    private offsetMap;
    private estimatedHeight;
    private totalHeight;
    private accessCount;
    private hitCount;
    private readonly DEFAULT_TTL;
    constructor(estimatedHeight?: number);
    /**
     * Measure and cache height for an item
     */
    measureHeight(index: number, element: HTMLElement): number;
    /**
     * Get height for an item (measured or estimated)
     */
    getHeight(index: number): number;
    /**
     * Get offset (cumulative height) for an item
     */
    getOffset(index: number): number;
    /**
     * Check if item height is measured
     */
    isMeasured(index: number): boolean;
    /**
     * Mark item as needing remeasurement
     */
    invalidate(index: number): void;
    /**
     * Clear specific item from cache
     */
    clear(index: number): void;
    /**
     * Clear entire cache
     */
    clearAll(): void;
    /**
     * Recalculate all offsets
     */
    private recalculateOffsets;
    /**
     * Get total height of all items
     */
    getTotalHeight(totalItems: number): number;
    /**
     * Find item index at a specific scroll position
     */
    findIndexAtPosition(position: number, totalItems: number): number;
    /**
     * Get cache statistics
     */
    getStats(totalItems: number): HeightCacheStats;
    /**
     * Update estimated height
     */
    updateEstimatedHeight(height: number): void;
    /**
     * Get estimated height
     */
    getEstimatedHeight(): number;
    /**
     * Cleanup old entries (older than TTL)
     */
    cleanup(ttl?: number): void;
    /**
     * Get all measured heights
     */
    getAllHeights(): Map<number, number>;
    /**
     * Set heights in bulk (for initial data load)
     */
    setHeightsBulk(heights: Map<number, number>): void;
}
export default HeightMeasurementCache;
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