abt-universal-search/dist/virtualization/VirtualScrollManager.d.ts

Enterprise-grade Universal Search System with cross-platform compatibility, performance optimization, and security hardening

import { IVirtualScrollManager, VirtualScrollConfig, ViewportInfo, VisibleRange, VirtualScrollEvents, DynamicHeightConfig, SmoothScrollConfig, VirtualScrollPerformance, ItemAlignment } from '../types/Virtualization';
export declare class VirtualScrollManager<T = any> implements IVirtualScrollManager<T> {
    private items;
    private config;
    private dynamicHeightConfig;
    private smoothScrollConfig;
    private events;
    private scrollElement;
    private containerElement;
    private scrollState;
    private visibleRange;
    private heightCache;
    private offsetCache;
    private isScrolling;
    private scrollTimeout;
    private animationFrameId;
    private resizeObserver;
    private intersectionObserver;
    private performance;
    private lastFrameTime;
    private frameCount;
    private renderStartTime;
    constructor(config?: Partial<VirtualScrollConfig>, events?: VirtualScrollEvents<T>, dynamicHeightConfig?: Partial<DynamicHeightConfig>, smoothScrollConfig?: Partial<SmoothScrollConfig>);
    private initializeObservers;
    setItems(items: T[]): void;
    scrollTo(index: number, align?: ItemAlignment): void;
    scrollToOffset(offset: number): void;
    private smoothScrollTo;
    private applyEasing;
    private calculateScrollTop;
    getVisibleRange(): VisibleRange;
    updateViewport(viewport: ViewportInfo): void;
    private determineScrollDirection;
    private calculateScrollVelocity;
    private updateVisibleRange;
    private findItemIndex;
    getItemOffset(index: number): number;
    getItemHeight(index: number): number;
    private getEstimatedItemHeight;
    getTotalHeight(): number;
    resetCache(): void;
    getScrollElement(): HTMLElement | null;
    isItemVisible(index: number): boolean;
    setScrollElement(element: HTMLElement): void;
    setContainerElement(element: HTMLElement): void;
    private addScrollListeners;
    private removeScrollListeners;
    private handleScroll;
    private handleScrollStart;
    private handleScrollEnd;
    private startScrolling;
    private stopScrolling;
    private handleResize;
    private handleItemVisible;
    private measureItemHeight;
    private updatePerformanceMetrics;
    getPerformanceMetrics(): VirtualScrollPerformance;
    dispose(): void;
}
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