import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
export type KeyCommand = {
    /**
     * The non-modifier key(s) that must be pressed for the event to fire.
     */
    key: string | string[];
    label?: string;
    ctrl?: boolean;
    alt?: boolean;
    shift?: boolean;
    super?: boolean;
    tab?: boolean;
    /**
     * Should the handler interrupt default event handling
     */
    interrupt?: boolean;
};
/**
 * Service that listens for global keyboard events
 */
export declare class KeyboardService {
    private heldKeys;
    keyCommands: {
        ctrl?: boolean;
        alt?: boolean;
        shift?: boolean;
        super?: boolean;
        interrupt?: boolean;
        label?: string;
        keys: string[];
        sub: Subject<KeyboardEvent>;
    }[];
    constructor();
    private onKeyDown;
    private onKeyUp;
    private onKeyPress;
    /**
     * Use this to subscribe to keyboard events throughout
     * the application. This is a passive listener and will
     * **NOT** interrupt the event chain.
     */
    onKeyCommand(key: KeyCommand): {
        subscribe: {
            (observerOrNext?: Partial<import("rxjs").Observer<KeyboardEvent>> | ((value: KeyboardEvent) => void)): import("rxjs").Subscription;
            (next?: (value: KeyboardEvent) => void, error?: (error: any) => void, complete?: () => void): import("rxjs").Subscription;
        };
        closed: boolean;
        observers: import("rxjs").Observer<KeyboardEvent>[];
        isStopped: boolean;
        hasError: boolean;
        thrownError: any;
        source: import("rxjs").Observable<any>;
        operator: import("rxjs").Operator<any, KeyboardEvent>;
    };
    /**
     * Return `true` if shift is currently pressed.
     */
    get isShiftPressed(): boolean;
    /**
     * Return `true` if ctrl is currently pressed.
     */
    get isCtrlPressed(): boolean;
    /**
     * Return `true` if alt is currently pressed.
     */
    get isAltPressed(): boolean;
    /**
     * Return `true` if super (mac/linux) or the windows key is currently pressed.
     */
    get isSuperPressed(): boolean;
    /**
     * Return `true` if tab is currently pressed.
     */
    get isTabPressed(): boolean;
    clearKeys(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<KeyboardService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<KeyboardService>;
}