/**
 * Variable Height Manager
 * Manages variable height items with efficient position calculations
 */
import { VisibleRange } from './types';
export interface VariableHeightConfig {
    estimatedHeight: number;
    minHeight: number;
    maxHeight: number;
    bufferSize: number;
}
export interface ItemPosition {
    index: number;
    offset: number;
    height: number;
}
export declare class VariableHeightManager {
    private heightCache;
    private config;
    private totalItems;
    private lastMeasuredIndex;
    constructor(config?: Partial<VariableHeightConfig>);
    /**
     * Set total number of items
     */
    setTotalItems(total: number): void;
    /**
     * Measure item height from DOM element
     */
    measureElement(index: number, element: HTMLElement | null): number;
    /**
     * Get item position (offset and height)
     */
    getItemPosition(index: number): ItemPosition;
    /**
     * Calculate visible range for variable heights
     */
    calculateVisibleRange(scrollTop: number, viewportHeight: number): VisibleRange;
    /**
     * Get total height of all items
     */
    getTotalHeight(): number;
    /**
     * Scroll to specific item index
     */
    scrollToIndex(index: number): number;
    /**
     * Get items to render for current viewport
     */
    getItemsToRender(scrollTop: number, viewportHeight: number): {
        items: ItemPosition[];
        totalHeight: number;
    };
    /**
     * Handle height change (when item height changes dynamically)
     */
    onHeightChange(index: number, newHeight: number): void;
    /**
     * Get cache statistics
     */
    getCacheStats(): import("./HeightMeasurementCache").HeightCacheStats;
    /**
     * Clear cache for specific range
     */
    clearRange(startIndex: number, endIndex: number): void;
    /**
     * Clear entire cache
     */
    clearCache(): void;
    /**
     * Get last measured index
     */
    getLastMeasuredIndex(): number;
    /**
     * Check if item is measured
     */
    isItemMeasured(index: number): boolean;
    /**
     * Get measured items count
     */
    getMeasuredCount(): number;
}
export default VariableHeightManager;
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