import { Element } from '@angular/compiler';
import { OnDestroy } from '@angular/core';
import * as i0 from "@angular/core";
export type HotKeyId = string | number | Element | HTMLElement | HTMLElement[];
export interface HotKey {
    id?: HotKeyId;
    keyCodes: string[];
    target?: HTMLElement | HTMLElement[];
    pathItem?: HTMLElement;
    withControlModifier?: boolean;
    withShiftModifier?: boolean;
    metaKey?: boolean;
    stopEvent?: boolean;
    callback(event: KeyboardEvent): void;
}
export declare class HotKeyService implements OnDestroy {
    private hotKeys;
    private readonly destroyed$;
    private observing$;
    private static cancelKeyboardEvent;
    registerHotKey(hotKey: HotKey): void;
    unregisterHotKey(idOrTarget: HotKeyId): void;
    ngOnDestroy(): void;
    startHotKeyObserve(): void;
    stopHotKeyObserve(): void;
    private isTargetMatched;
    private findAndRunHotKey;
    static ɵfac: i0.ɵɵFactoryDeclaration<HotKeyService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<HotKeyService>;
}