/// <reference types="webxr" />
import { Context, Event, Observable } from '@zcomponent/core';
/**
 * Enumeration representing the different modes of an XR session.
 */
export declare enum XRSessionMode {
    'inline' = "inline",
    'immersive-vr' = "immersive-vr",
    'immersive-ar' = "immersive-ar"
}
/**
 * @zcontext
 * @internal
 * TODO: Move to @zcomponent/three-webxr
 */
export declare class WebXRContext extends Context {
    onSelect: Event<[XRInputSourceEvent]>;
    /** @zui */
    sessionActive: Observable<boolean, never>;
    currentSession: Observable<XRSession | null, never>;
    immersiveVRSupported: Promise<boolean>;
    inputSources: Observable<XRInputSource[], never>;
    private _requestingSession;
    startOnLaunch(mode: XRSessionMode): Promise<void>;
    startSession(mode: XRSessionMode): Promise<void>;
    private _updateInputSources;
    endSession(): void;
}