import { Font, IFonts } from "../helpers";
/**
 * Interface representing the FontsManager.
 */
export interface IFontsManager {
    /**
     * A map storing fonts with their family and weight as the key.
     */
    map: Map<string, Font>;
    /**
     * Whether debugging is enabled.
     */
    debug: boolean;
}
/**
 * Class representing a manager for handling fonts.
 */
export declare class FontsManager implements IFontsManager {
    /**
     * A map storing fonts with their family and weight as the key.
     */
    map: Map<string, Font>;
    /**
     * Whether debugging is enabled.
     */
    debug: boolean;
    /**
     * Constructs a new FontsManager instance.
     * @param opts {Object} - Optional settings for the FontsManager.
     * @param opts.debug {boolean} - Whether debugging is enabled.
     */
    constructor(opts?: {
        debug?: boolean;
    });
    /**
     * Loads fonts into the manager from a given font list.
     * @param fontList {IFonts} - The fonts to load into the manager.
     * @returns {this} The current instance for chaining.
     */
    loadFonts(fontList: IFonts): this;
    /**
     * Replace base fonts with custom fonts by special file.
     * Use this method before loading fonts by `FontManager`.
     * The file should be generated by the following instructions in MD file.
     * @see https://github.com/NMMTY/LazyCanvas/blob/main/scripts/FontsGenerate.md
     * @param fonts {Font[]} - The fonts to add to the manager.
     * @returns {this} The current instance for chaining.
     * @throws {LazyError} If required font properties are missing or the font already exists.
     */
    add(...fonts: Font[]): this;
    /**
     * Removes fonts from the manager.
     * @param array {Array<{ family: string, weight: string }>} - The family and weight of the fonts to remove.
     * @returns {this} The current instance for chaining.
     */
    remove(...array: Array<{
        family: string;
        weight: string;
    }>): this;
    /**
     * Clears all fonts from the manager.
     * @returns {this} The current instance for chaining.
     */
    clear(): this;
    /**
     * Retrieves a font or fonts from the manager.
     * @param family {string} - The family of the font to retrieve.
     * @param weight {string} - The weight of the font to retrieve (optional).
     * @returns {Font | Font[] | undefined} The retrieved font(s) or undefined if not found.
     */
    get(family: string, weight?: string): Font | Font[] | undefined;
    /**
     * Checks if a font exists in the manager.
     * @param family {string} - The family of the font to check.
     * @param weight {string} - The weight of the font to check (optional).
     * @returns {boolean} True if the font exists, false otherwise.
     */
    has(family: string, weight?: string): boolean;
    /**
     * Retrieves the number of fonts in the manager.
     * @returns {number} The size of the font map.
     */
    size(): number;
    /**
     * Retrieves the values (fonts) from the manager.
     * @returns {IterableIterator<Font>} An iterator for the font values.
     */
    values(): IterableIterator<Font>;
    /**
     * Retrieves the keys (family and weight) from the manager.
     * @returns {IterableIterator<string>} An iterator for the font keys.
     */
    keys(): IterableIterator<string>;
    /**
     * Retrieves the entries (key-value pairs) from the manager.
     * @returns {IterableIterator<[string, Font]>} An iterator for the font entries.
     */
    entries(): IterableIterator<[string, Font]>;
    /**
     * Iterates over the fonts in the manager.
     * @param callbackfn {Function} - The function to execute on each font.
     * @param thisArg {any} - The `this` context to use (optional).
     * @returns {this} The current instance for chaining.
     */
    forEach(callbackfn: (value: Font, key: string, map: Map<string, Font>) => void, thisArg?: any): this;
    /**
     * Converts the font map to a JSON object.
     * @returns {object} The JSON representation of the font map.
     */
    toJSON(): object;
    /**
     * Populates the font map from a JSON object.
     * @param json {object} - The JSON object to populate the map from.
     * @returns {this} The current instance for chaining.
     */
    fromJSON(json: object): this;
    /**
     * Converts the font map to an array.
     * @returns {Font[]} An array of fonts.
     */
    toArray(): Font[];
    /**
     * Populates the font map from an array of fonts.
     * @param array {Font[]} - The array of fonts to populate the map from.
     * @returns {this} The current instance for chaining.
     */
    fromArray(array: Font[]): this;
}