/**
 * A message to display by the ngeo notification service.
 */
export type Message = {
    /**
     * The delay in milliseconds the message is shown
     */
    delay?: number;
    /**
     * Whether the message should be displayed inside a popup window or not.
     */
    popup?: boolean;
    /**
     * The message text to display.
     */
    msg: string;
    /**
     * The target element (or selector to get the element) in which
     * to display the message. If not defined, then the default target of the notification service is used.
     */
    target?: Element;
    /**
     * The type of message.
     */
    type?: string;
};
export declare enum MessageType {
    ERROR = "error",
    INFORMATION = "information",
    SUCCESS = "success",
    WARNING = "warning"
}
/**
 * Abstract class for services that display messages.
 * @class
 * @abstract
 */
export default class {
    /**
     * Show the message.
     * @abstract
     * @param message Message.
     * @protected
     */
    showMessage(message: Message): void;
    /**
     * Show disclaimer message string or object or list of disclame message
     * strings or objects.
     * @param object A message or list of messages as text or configuration objects.
     */
    show(object: string | Message | (string | Message)[]): void;
    /**
     * Display the given error message or list of error messages.
     * @param message Message or list of messages.
     */
    error(message: string | string[]): void;
    /**
     * Display the given info message or list of info messages.
     * @param message Message or list of messages.
     */
    info(message: string | string[]): void;
    /**
     * Display the given success message or list of success messages.
     * @param message Message or list of messages.
     */
    success(message: string | string[]): void;
    /**
     * Display the given warning message or list of warning messages.
     * @param message Message or list of messages.
     */
    warn(message: string | string[]): void;
    /**
     * Returns an array of message object from any given message string, list of
     * message strings, message object or list message objects. The type can be
     * overridden here as well OR defined (if the message(s) is/are string(s),
     * defaults to 'information').
     * @param object
     *     A message or list of messages as text or configuration objects.
     * @param opt_type The type of message to override the messages with.
     * @returns List of message objects.
     * @protected
     */
    getMessageObjects(object: string | Message | (string | Message)[], opt_type?: string): Message[];
}