import { GridColumnDef, GridGroupState } from '../models';
import * as i0 from "@angular/core";
/**
 * Enterprise-grade export service for the DataGrid.
 * Generates native XLSX binary workbooks and vector PDF documents
 * with zero external dependencies.
 */
export declare class GridExportXlsxService {
    /**
     * Export data as a native .xlsx binary workbook.
     * Supports: styled headers, auto-column widths, frozen header pane,
     * number formatting, and multi-sheet grouped exports.
     */
    exportToXlsx<T extends object>(data: T[], columns: GridColumnDef<T>[], filename?: string, options?: XlsxExportOptions): void;
    /**
     * Export data as a native vector PDF document.
     * Supports: title, page numbers, column alignment, landscape/portrait.
     */
    exportToPdf<T extends object>(data: T[], columns: GridColumnDef<T>[], options?: PdfExportOptions): void;
    private buildWorkbook;
    private buildContentTypes;
    private buildRootRels;
    private buildWorkbookXml;
    private buildWorkbookRels;
    private buildStyles;
    private buildSheetXml;
    private buildPdfTableHtml;
    private rowToValues;
    private rowToStringValues;
    private computeColumnWidths;
    private computeRelativeColumnWidths;
    private colIndexToLetter;
    private sanitizeSheetName;
    private escapeXml;
    private escapeHtml;
    private downloadBlob;
    static ɵfac: i0.ɵɵFactoryDeclaration<GridExportXlsxService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<GridExportXlsxService>;
}
export interface XlsxExportOptions {
    sheetName?: string;
    freezeHeader?: boolean;
    autoFilter?: boolean;
    groupBy?: GridGroupState | null;
    includeFooter?: boolean;
    title?: string;
    dateFormat?: string;
    numberFormat?: string;
}
export interface PdfExportOptions {
    title?: string;
    orientation?: 'portrait' | 'landscape';
    pageSize?: 'A4' | 'A3' | 'Letter' | 'Legal';
    fontSize?: number;
    headerFontSize?: number;
    margin?: number;
    groupBy?: GridGroupState | null;
    showPageNumbers?: boolean;
    showDate?: boolean;
}
export interface XlsxSheet {
    name: string;
    headers: string[];
    data: unknown[][];
    columnWidths: number[];
    columnTypes: string[];
}