import type { Options } from './options';
export type Request = {
    type: 'image' | 'text';
    resolve?: (response: string) => void;
    reject?: (error: Error) => void;
    response: Promise<string>;
};
export interface InternalContext<T extends Node> {
    /**
     * FLAG
     */
    __CONTEXT__: true;
    /**
     * Logger
     */
    log: {
        time: (label: string) => void;
        timeEnd: (label: string) => void;
        warn: (...args: any[]) => void;
    };
    /**
     * Node
     */
    node: T;
    /**
     * Owner document
     */
    ownerDocument?: Document;
    /**
     * Owner window
     */
    ownerWindow?: Window;
    /**
     * DPI
     *
     * scale === 1 ? null : 96 * scale
     */
    dpi: number | null;
    /**
     * The `style` element under the root `svg` element
     */
    svgStyleElement?: HTMLStyleElement;
    /**
     * The `defs` element under the root `svg` element
     */
    svgDefsElement?: SVGDefsElement;
    /**
     * The `svgStyleElement` class styles
     *
     * Map<cssText, class[]>
     */
    svgStyles: Map<string, string[]>;
    /**
     * The map of default `getComputedStyle` for all tagnames
     */
    defaultComputedStyles: Map<string, Map<string, any>>;
    /**
     * The IFrame sandbox used to get the `defaultComputedStyles`
     */
    sandbox?: HTMLIFrameElement;
    /**
     * Web Workers
     */
    workers: Worker[];
    /**
     * The set of `font-family` values for all cloend elements
     */
    fontFamilies: Set<string>;
    /**
     * Map<CssUrl, DataUrl>
     */
    fontCssTexts: Map<string, string>;
    /**
     * `headers.accept` to use when `window.fetch` fetches images
     */
    acceptOfImage: string;
    /**
     * All requests for `fetch`
     */
    requests: Map<string, Request>;
    /**
     * Canvas multiple draw image fix svg+xml image decoding in Safari and Firefox
     */
    drawImageCount: number;
    /**
     * Wait for all tasks embedded in
     */
    tasks: Promise<void>[];
    /**
     * Automatically destroy context
     */
    autoDestruct: boolean;
    /**
     * Is enable
     *
     * @param key
     */
    isEnable: (key: string) => boolean;
}
export type Context<T extends Node = Node> = InternalContext<T> & Required<Options>;