import { Service } from './metadata';
import { Observable } from 'rxjs';
import { ViewProperties } from '@scion/workbench-application-platform.api';
/**
 * Allows interaction with workbench views.
 *
 * A view is a visual component within the Workbench to present content,
 * and which can be arranged in a view grid.
 */
export declare class ViewService implements Service {
    private _destroy$;
    private _active$;
    private _destroyNotifier;
    constructor();
    private onHostMessage;
    /**
     * Sets properties of the view which is currently showing this application.
     */
    setProperties(properties: ViewProperties): void;
    /**
     * Gets properties of the view which is currently showing this application.
     */
    getProperties(): Promise<ViewProperties>;
    /**
     * Closes the view which is currently showing this application.
     */
    close(): void;
    /**
     * Sets a notifier function which is called upon view destruction.
     * The notifier must return a falsy value to prevent view destruction,
     * either as a boolean value or as an observable which emits a boolean value.
     */
    setDestroyNotifier(destroyNotifier: DestroyNotifier): void;
    /**
     * Indicates whether this view is the active viewpart view.
     * Emits the current state upon subscription.
     */
    get active$(): Observable<boolean>;
    onDestroy(): void;
    private handleActiveChange;
    private handleBeforeDestroy;
}
/**
 * Notifier function which is called upon view destruction.
 * The notifier must return a falsy value to prevent view destruction,
 * either as a boolean value or as an observable which emits a boolean value.
 */
declare type DestroyNotifier = () => Observable<boolean> | Promise<boolean> | boolean;
export {};