import type { Transaction } from "@olenbetong/appframe-updater";
import { type Dispatch, type SetStateAction } from "react";
import { type EditorTransactionRow, type TableColumn } from "./tableFormatting.js";
export declare const CURSOR_ACTIVE = ">";
export declare const CURSOR_INACTIVE = " ";
export declare const SELECTION_ACTIVE = "[x]";
export declare const SELECTION_INACTIVE = "[ ]";
export declare const PREFIX_SPACER = " ";
export declare const CURSOR_PREFIX_WIDTH: number;
export declare const HEADER_PREFIX: string;
export type TransactionsViewportLine = {
    key: string;
    text: string;
    highlight: boolean;
};
export interface VirtualScrollingStats {
    totalRowCount: number;
    displayedRowCount: number;
    firstVisibleRow: number;
    lastVisibleRow: number;
}
export interface UseVirtualScrollingOptions {
    cursor: number;
    setCursor: Dispatch<SetStateAction<number>>;
    dataAreaHeight: number;
    rows: EditorTransactionRow[];
    columns: TableColumn<EditorTransactionRow>[];
    widths: number[];
    tableContentWidth: number;
    lineWidth: number;
    normalizedTransactions: Transaction[];
    selectedPrimKeys: Set<string>;
    modifiedPrimKeys: Set<string>;
    loading: boolean;
    initialOffset?: number;
}
export interface UseVirtualScrollingResult {
    offset: number;
    setOffset: Dispatch<SetStateAction<number>>;
    bodyLines: TransactionsViewportLine[];
    pageStep: number;
    stats: VirtualScrollingStats;
}
export declare function useVirtualScrolling({ cursor, setCursor, dataAreaHeight, rows, columns, widths, tableContentWidth, lineWidth, normalizedTransactions, selectedPrimKeys, modifiedPrimKeys, loading, initialOffset, }: UseVirtualScrollingOptions): UseVirtualScrollingResult;