import type { PluginListenerHandle } from '@capacitor/core';
export declare const PrinterDPIs: readonly [200, 300];
export declare const PrintAlignments: readonly ["left", "center", "right"];
export declare const PrinterFonts: readonly ["A", "B"];
export declare const BarcodeTextPlacements: readonly ["none", "above", "below", "both"];
export declare const BarcodeTypes: readonly ["UPC_A", "EAN8", "EAN13", "CODE39", "ITF", "CODABAR", "CODE128"];
export declare const DataCodeTypes: readonly ["QR", "UPC_A", "EAN8", "EAN13", "CODE39", "ITF", "CODABAR", "CODE128"];
/**
 * When `"default"`, uses default internal printer settings.
 */
export type IsEnabled = boolean | 'default';
export type PrinterDPI = (typeof PrinterDPIs)[number];
export type PrintAlignment = (typeof PrintAlignments)[number];
export type BarcodeTextPlacement = (typeof BarcodeTextPlacements)[number];
/**
 * Available printer font types.
 * - `A`: Size of 12x24.
 * - `B`: Size of 9x24.
 * */
export type PrinterFont = (typeof PrinterFonts)[number];
export type BarcodeType = (typeof BarcodeTypes)[number];
export type DataCodeType = (typeof DataCodeTypes)[number];
export type Base64Encodable = string | Blob | BufferSource | number[];
export interface BluetoothDevice {
    name: string;
    address: string;
}
export interface CapacitorThermalPrinterPlugin {
    /**
     * @category Connectivity
     */
    startScan(): Promise<void>;
    /**
     * @category Connectivity
     */
    stopScan(): Promise<void>;
    /**
     * @category Connectivity
     */
    connect(options: {
        address: string;
    }): Promise<BluetoothDevice | null>;
    /**
     * @category Connectivity
     */
    disconnect(): Promise<void>;
    /**
     * @category Connectivity
     */
    isConnected(): Promise<boolean>;
    /**
     * Emitted when new devices are discovered.
     *
     * @remarks
     * If you're using Angular as your framework of choice, the handler doesn't run in zone.
     *
     * @category Event Listeners
     */
    addListener(event: 'discoverDevices', handler: (data: {
        devices: BluetoothDevice[];
    }) => void): Promise<PluginListenerHandle>;
    /**
     * Emitted when device discovery finishes.
     *
     * @remarks
     * If you're using Angular as your framework of choice, the handler doesn't run in zone.
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.startScan}
     * @see {@linkcode CapacitorThermalPrinterPlugin.stopScan}
     *
     * @category Event Listeners
     */
    addListener(event: 'discoveryFinish', handler: () => void): Promise<PluginListenerHandle>;
    /**
     * Emitted when a printer is successfully connected.
     *
     * @remarks
     * If you're using Angular as your framework of choice, the handler doesn't run in zone.
     *
     * @category Event Listeners
     */
    addListener(event: 'connected', handler: (device: BluetoothDevice) => void): Promise<PluginListenerHandle>;
    /**
     * Emitted when a printer is disconnected.
     *
     * @remarks
     * If you're using Angular as your framework of choice, the handler doesn't run in zone.
     *
     * @category Event Listeners
     */
    addListener(event: 'disconnected', handler: () => void): Promise<PluginListenerHandle>;
    /**
     * Formats following texts as bold.
     *
     * @param enabled - Defaults to `true` if not specified.
     *
     * @see {@linkcode IsEnabled}
     * @see {@linkcode CapacitorThermalPrinterPlugin.text}
     *
     * @category Text Formatting
     */
    bold(enabled?: IsEnabled): this;
    /**
     * Formats following texts as underlined.
     *
     * @param enabled - Defaults to `true` if not specified.
     *
     * @see {@linkcode IsEnabled}
     * @see {@linkcode CapacitorThermalPrinterPlugin.text}
     *
     * @category Text Formatting
     * */
    underline(enabled?: IsEnabled): this;
    /**
     * Formats following texts with double width of each character.
     *
     * @param enabled - Defaults to `true` if not specified.
     *
     * @see {@linkcode IsEnabled}
     * @see {@linkcode CapacitorThermalPrinterPlugin.text}
     * @see {@linkcode CapacitorThermalPrinterPlugin.doubleHeight}
     *
     * @category Text Formatting
     */
    doubleWidth(enabled?: IsEnabled): this;
    /**
     * Formats following texts with double height of each character.
     *
     * @param enabled - Defaults to `true` if not specified.
     *
     * @see {@linkcode IsEnabled}
     * @see {@linkcode CapacitorThermalPrinterPlugin.text}
     * @see {@linkcode CapacitorThermalPrinterPlugin.doubleWidth}
     *
     * @category Text Formatting
     */
    doubleHeight(enabled?: IsEnabled): this;
    /**
     * Formats following texts with inverted colors. (white text on black background)
     *
     * @param enabled - Defaults to `true` if not specified.
     *
     * @see {@linkcode IsEnabled}
     * @see {@linkcode CapacitorThermalPrinterPlugin.text}
     *
     * @category Text Formatting
     */
    inverse(enabled?: IsEnabled): this;
    /**
     *
     * Sets the DPI used to correctly encode the width of the image used in {@linkcode CapacitorThermalPrinterPlugin.limitWidth} based on the printer.
     *
     * @param dpi - The DPI value.
     *
     * @remarks
     * - The initial DPI is 200.
     * - Must be either 200 or 300. Any other value will be treated as 200.
     *
     * @see {@linkcode PrinterDPI}
     * @see {@linkcode PrinterDPIs}
     * @see {@linkcode CapacitorThermalPrinterPlugin.limitWidth}
     * @see {@linkcode CapacitorThermalPrinterPlugin.image}
     *
     * @category Image Formatting
     */
    dpi(dpi: PrinterDPI): this;
    /**
     * Limits the width of following images.
     *
     * @param width - The maximum width of the image in millimeters ranging from 1mm to 880mm.
     *
     * @remarks
     * - The initial maximum width is 45mm.
     * - If the width is less than 1mm, this will fail silently.
     * - If the width is greater than 880mm it will be treated as 880mm.
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.dpi}
     * @see {@linkcode CapacitorThermalPrinterPlugin.image}
     *
     * @category Image Formatting
     */
    limitWidth(width: number): this;
    /**
     * Aligns following texts, images, qr codes and barcodes with the given alignment.
     *
     * @param alignment - Alignment to use.
     *
     * @see {@linkcode PrintAlignment}
     * @see {@linkcode PrintAlignments}
     * @see {@linkcode CapacitorThermalPrinterPlugin.text}
     * @see {@linkcode CapacitorThermalPrinterPlugin.image}
     * @see {@linkcode CapacitorThermalPrinterPlugin.qr}
     * @see {@linkcode CapacitorThermalPrinterPlugin.barcode}
     *
     * @category Hybrid Formatting
     */
    align(alignment: PrintAlignment): this;
    /**
     * Sets the character spacing of following texts and barcode texts.
     *
     * @param charSpacing - The character spacing in millimeters ranging from 0mm to 30mm.
     *
     * @remarks
     * - The initial spacing is 1mm.
     * - If the spacing is less than 0mm it will be treated as 0mm.
     * - If the spacing is greater than 30mm it will be treated as 30mm.
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.text}
     * @see {@linkcode CapacitorThermalPrinterPlugin.barcode}
     *
     * @category Hybrid Formatting
     */
    charSpacing(charSpacing: number): this;
    /**
     * Sets the line spacing of following texts, images, qr codes, barcodes with the given spacing.
     *
     * @param lineSpacing - The line spacing in millimeters ranging from 0mm to 255mm.
     *
     * @remarks
     * - The initial spacing is 30mm.
     * - If the spacing is less than 0mm it will be treated as 0mm.
     * - If the spacing is greater than 255mm it will be treated as 255mm.
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.text}
     * @see {@linkcode CapacitorThermalPrinterPlugin.image}
     * @see {@linkcode CapacitorThermalPrinterPlugin.qr}
     * @see {@linkcode CapacitorThermalPrinterPlugin.barcode}
     *
     * @category Hybrid Formatting
     */
    lineSpacing(lineSpacing: number): this;
    /**
     * Formats following texts and barcode texts with the given font.
     *
     * @param font - Font to use.
     *
     * @see {@linkcode PrinterFont}
     * @see {@linkcode PrinterFonts}
     * @see {@linkcode CapacitorThermalPrinterPlugin.text}
     * @see {@linkcode CapacitorThermalPrinterPlugin.barcode}
     *
     * @category Hybrid Formatting
     */
    font(font: PrinterFont): this;
    /**
     * Clears all formatting.
     *
     * @category Hybrid Formatting
     */
    clearFormatting(): this;
    /**
     * Sets the width of following barcodes.
     *
     * @param width - Width of barcode ranging from 3 to 6.
     *
     * @remarks
     * - The initial width is 3.
     * - Depending on the printer model, it may **halt** if the width exceeds it's printing width.
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.barcode}
     * @see {@linkcode CapacitorThermalPrinterPlugin.barcodeHeight}
     *
     * @category Barcode Formatting
     */
    barcodeWidth(width: number): this;
    /**
     * Sets the height of following barcodes.
     *
     * @param height - Height of barcode in millimeters ranging from 1mm to 255mm.
     *
     * @remarks
     * - The initial height is 72mm.
     * - If the height is less than 1mm it will be treated as 1mm.
     * - If the height is greater than 255mm it will be treated as 255mm.
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.barcode}
     * @see {@linkcode CapacitorThermalPrinterPlugin.barcodeWidth}
     *
     * @category Barcode Formatting
     */
    barcodeHeight(height: number): this;
    /**
     * Sets the placement of following barcode texts.
     *
     * @param placement - Placement to use.
     *
     * @see {@linkcode BarcodeTextPlacement}
     * @see {@linkcode BarcodeTextPlacements}
     * @see {@linkcode CapacitorThermalPrinterPlugin.barcode}
     *
     * @category Barcode Formatting
     */
    barcodeTextPlacement(placement: BarcodeTextPlacement): this;
    /**
     * Adds text to the print queue.
     *
     * @param text - Text to use.
     *
     * @remarks
     * To print a newline, explicitly end the text with a newline character (`\n`).
     *
     * @category Content
     */
    text(text: string): this;
    /**
     * Adds an image to the print queue.
     *
     * @param data - Image data. Can be a URL, a data URL, a Base64, a Blob, a BufferSource or a number array.
     *
     * @remarks
     * The supported image formats the running platform's supported formats.
     * For maximum compatibility, use PNG and JPEG formats.
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.limitWidth}
     *
     * @category Content
     */
    image(data: Base64Encodable): this;
    /**
     * Adds a QR code to the print queue.
     *
     * @param data - QR code data.
     *
     * @category Content
     */
    qr(data: string): this;
    /**
     * Adds a barcode to the print queue.
     *
     * @param type - Barcode type.
     * @param data - Barcode data.
     *
     * @see {@linkcode BarcodeType}
     * @see {@linkcode DataCodeType}
     * @see {@linkcode BarcodeTypes}
     * @see {@linkcode DataCodeTypes}
     *
     * @category Content
     */
    barcode(type: BarcodeType, data: string): this;
    /**
     * Adds raw data to the print queue. Use only if you know what you are doing.
     *
     * @param data - The data. Can be a URL, a data URL, a Base64, a Blob, a BufferSource or a number array.
     *
     * @remarks
     * Each byte will be truncated/wrapped if it's outside the range of 0 to 255.
     *
     * @category Content
     */
    raw(data: Base64Encodable): this;
    /**
     * Adds a self-test instruction to the print queue which usually prints general information about the printer and its capabilities.
     *
     * @remarks
     * The printer may not support this instruction and fail silently.
     *
     * @category Content
     */
    selfTest(): this;
    /**
     * Adds a beep instruction to the print queue.
     *
     * @remarks
     * The printer may not support this instruction and fail silently.
     *
     * @category Content Actions
     */
    beep(): this;
    /**
     * Adds an open drawer instruction to the print queue.
     *
     * @remarks
     * The printer may not support this instruction and fail silently.
     *
     * @category Content Actions
     */
    openDrawer(): this;
    /**
     * Adds a cut instruction to the print queue.
     *
     * @param half - If true, performs a half cut depending on the printer model.
     *
     * @remarks
     * - The printer may not support the full cut instruction and fail silently.
     * - The printer may not support the half cut instruction and fail silently.
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.feedCutPaper}
     *
     * @category Content Actions
     */
    cutPaper(half?: boolean): this;
    /**
     * Adds a cut instruction to the print queue preceded by a line feed.
     *
     * @param half - If true, performs a half cut depending on the printer model.
     * @remarks
     * - The printer may not support the full cut instruction and fail silently.
     * - The printer may not support the half cut instruction and fail silently.
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.cutPaper}
     *
     * @category Content Actions
     */
    feedCutPaper(half?: boolean): this;
    /**
     * Resets the print queue while clearing all formatting.
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.write}
     * @see {@linkcode CapacitorThermalPrinterPlugin.clearFormatting}
     *
     * @category Printing Actions
     */
    begin(): this;
    /**
     * Writes the print queue to the printer.
     *
     * @remarks
     * Calling this method doesn't reset the print queue
     *
     * @see {@linkcode CapacitorThermalPrinterPlugin.begin}
     *
     * @category Printing Actions
     */
    write(): Promise<void>;
}