/**
 * Augment Express response object to allow support for res.pdf()
 */
declare global {
    namespace Express {
        interface Response {
            pdf: (html: string, options?: HTMLToPDFOptions) => Promise<this>;
        }
    }
}
/**
 * Configuration for the express-html-to-pdf middleware.
 */
export interface HTMLToPDFOptions {
    /**
     * Should the file render inline within the browser or download as an attachment?
     * @default 'inline'
     */
    disposition?: 'inline' | 'attachment';
    /**
     * The filename to use for the generated file (including extension).
     * @default 'document.pdf'
     */
    filename?: string;
    /**
     * The Puppeteer launch options configuration.
     * @default { args: ['--font-render-hinting=none'] }
     */
    browserOptions?: LaunchOptions;
    /**
     * The value to return whenever a PDF generation failure occurs.
     * @default 'Unable to generate PDF'
     */
    errorBody?: any;
    /**
     * The Puppeteer PDF options configuration.
     * @default { printBackground: true }
     */
    pdfOptions?: PDFOptions;
    /**
     * By default, we assume the PDF document supplied will not contain requests over HTTP
     * (for fastest possible PDF generation). Typically you can embed resources by base64
     * encoding them as data URI's. If you have HTML that pulls assets or other resources over HTTP,
     * set this to true.
     * @default false
     */
    waitForNetworkIdle?: boolean;
}
/**
 * Accepts values labeled with units. If number, treat as pixels.
 */
export declare type LayoutDimension = string | number;
/**
 * Pre-defined PDF formats.
 */
export declare type PDFFormat = 'Letter' | 'Legal' | 'Tabloid' | 'Ledger' | 'A0' | 'A1' | 'A2' | 'A3' | 'A4' | 'A5';
/**
 * The Puppeteer PDF options configuration.
 */
export interface PDFOptions {
    /**
     * The file path to save the PDF to.
     * If `path` is a relative path, then it is resolved relative to current working directory.
     * If no path is provided, the PDF won't be saved to the disk.
     */
    path?: string;
    /**
     * Scale of the webpage rendering.
     * @default 1
     */
    scale?: number;
    /**
     * Display header and footer.
     * @default false
     */
    displayHeaderFooter?: boolean;
    /**
     * HTML template for the print header. Should be valid HTML markup with following classes used to inject printing values into them:
     * - `date` formatted print date
     * - `title` document title
     * - `url` document location
     * - `pageNumber` current page number
     * - `totalPages` total pages in the document
     */
    headerTemplate?: string;
    /**
     * HTML template for the print footer. Should be valid HTML markup with following classes used to inject printing values into them:
     * - `date` formatted print date
     * - `title` document title
     * - `url` document location
     * - `pageNumber` current page number
     * - `totalPages` total pages in the document
     */
    footerTemplate?: string;
    /**
     * Print background graphics.
     * @default true
     */
    printBackground?: boolean;
    /**
     * Paper orientation.
     * @default false
     */
    landscape?: boolean;
    /**
     * Paper ranges to print, e.g., '1-5, 8, 11-13'.
     * @default '' which means print all pages.
     */
    pageRanges?: string;
    /**
     * Paper format. If set, takes priority over width or height options.
     * @default 'Letter'
     */
    format?: PDFFormat;
    /** Paper width. */
    width?: LayoutDimension;
    /** Paper height. */
    height?: LayoutDimension;
    /** Paper margins, defaults to none. */
    margin?: {
        /** Top margin. */
        top?: LayoutDimension;
        /** Right margin. */
        right?: LayoutDimension;
        /** Bottom margin. */
        bottom?: LayoutDimension;
        /** Left margin. */
        left?: LayoutDimension;
    };
    /**
     * Give any CSS @page size declared in the page priority over what is declared in width and
     * height or format options.
     * @default false which will scale the content to fit the paper size.
     */
    preferCSSPageSize?: boolean;
}
/**
 * The Puppeteer launch options configuration.
 */
export interface LaunchOptions {
    /**
     * Path to a Chromium executable to run instead of bundled Chromium. If
     * executablePath is a relative path, then it is resolved relative to current
     * working directory.
     */
    executablePath?: string;
    /**
     * Do not use `puppeteer.defaultArgs()` for launching Chromium.
     * @default false
     */
    ignoreDefaultArgs?: boolean | string[];
    /**
     * Close chrome process on Ctrl-C.
     * @default true
     */
    handleSIGINT?: boolean;
    /**
     * Close chrome process on SIGTERM.
     * @default true
     */
    handleSIGTERM?: boolean;
    /**
     * Close chrome process on SIGHUP.
     * @default true
     */
    handleSIGHUP?: boolean;
    /**
     * Whether to pipe browser process stdout and stderr into process.stdout and
     * process.stderr.
     * @default false
     */
    dumpio?: boolean;
    /**
     * Specify environment variables that will be visible to Chromium.
     * @default `process.env`.
     */
    env?: {
        [key: string]: string | boolean | number;
    };
    /**
     * Connects to the browser over a pipe instead of a WebSocket.
     * @default false
     */
    pipe?: boolean;
    /**
     * Maximum navigation time in milliseconds, pass 0 to disable timeout.
     * @default 30000
     */
    timeout?: number;
    /**
     * Whether to ignore HTTPS errors during navigation.
     * @default false
     */
    ignoreHTTPSErrors?: boolean;
    /**
     * Sets a consistent viewport for each page. Defaults to an 800x600 viewport. null disables the default viewport.
     */
    defaultViewport?: {
        /**
         * page width in pixels.
         */
        width?: number;
        /**
         * page height in pixels.
         */
        height?: number;
        /**
         * Specify device scale factor (can be thought of as dpr).
         * @default 1
         */
        deviceScaleFactor?: number;
        /**
         * Whether the meta viewport tag is taken into account.
         * @default false
         */
        isMobile?: boolean;
        /**
         * Specifies if viewport supports touch events.
         * @default false
         */
        hasTouch?: boolean;
        /**
         * Specifies if viewport is in landscape mode.
         * @default false
         */
        isLandscape?: boolean;
    } | null;
    /**
     * Slows down Puppeteer operations by the specified amount of milliseconds.
     * Useful so that you can see what is going on.
     */
    slowMo?: number;
    /**
     * Whether to run browser in headless mode.
     * @default true unless the devtools option is true.
     */
    headless?: boolean;
    /**
     * Additional arguments to pass to the browser instance.
     * The list of Chromium flags can be found here.
     * @default ['----font-render-hinting=none']
     */
    args?: string[];
    /**
     * Path to a User Data Directory.
     */
    userDataDir?: string;
    /**
     * Whether to auto-open a DevTools panel for each tab.
     * If this option is true, the headless option will be set false.
     */
    devtools?: boolean;
}