import { type TableVirtualItem, type TableVirtualPlan } from './table-virtual-model';
export interface TableVirtualControllerState {
    enabled: boolean;
    items: readonly TableVirtualItem[];
    pinnedRowIds: ReadonlySet<string>;
    viewport: HTMLElement | null;
    viewportSize: number;
}
export interface TableVirtualControllerOptions {
    state: () => TableVirtualControllerState;
    windowChanged: (plan: TableVirtualPlan | null) => void;
    requestAnimationFrame?: (callback: FrameRequestCallback) => number;
    cancelAnimationFrame?: (handle: number) => void;
}
/** Binds viewport scroll/resize to a recycled row window. Scroll offset stays off render state. */
export declare class TableVirtualController {
    private readonly options;
    private connected;
    private connectedViewport;
    private resizeObserver;
    private measurementObserver;
    private measurementTargets;
    private viewportWidth;
    private viewportSize;
    private frame;
    private measures;
    private measuredIds;
    private plan;
    private index;
    private indexedItems;
    private indexDirty;
    private scrollOffset;
    private scrollDirection;
    private pendingReset;
    private readonly raf;
    private readonly caf;
    constructor(options: TableVirtualControllerOptions);
    connect(): void;
    disconnect(): void;
    refresh(): void;
    schedule: () => void;
    /** Drop cached heights after column, density, or wrap geometry changes. */
    invalidateMeasures(): void;
    /** Rebuild from a new index and pin the viewport to the start. */
    resetToTop(): void;
    sizeFor(item: TableVirtualItem): number;
    currentPlan(): TableVirtualPlan | null;
    currentViewportSize(): number;
    /** Measure painted rows and correct scroll when estimates were wrong. */
    collectMeasurements(root: ParentNode | null): void;
    private applyMeasurements;
    private syncMeasurementTargets;
    private readonly handleViewportResize;
    private readonly handleScroll;
    private sync;
    private emit;
    private ensureIndex;
    private unbindViewport;
    private cancelFrame;
}
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