import { Event } from '../../../util/vs/base/common/event';
import { IDisposable } from '../../../util/vs/base/common/lifecycle';
export declare const IPowerService: import("../../../util/common/services").ServiceIdentifier<IPowerService>;
export interface IPowerService {
    readonly _serviceBrand: undefined;
    /**
     * Fires when the system is suspending (going to sleep).
     */
    readonly onDidSuspend: Event<void>;
    /**
     * Fires when the system is resuming from sleep.
     */
    readonly onDidResume: Event<void>;
    /**
     * Acquires a power save blocker that prevents app suspension.
     * The blocker is reference-counted and will be released 2 minutes after
     * the last acquisition is disposed.
     *
     * @returns A disposable that releases this acquisition when disposed.
     */
    acquirePowerSaveBlocker(): IDisposable;
}
/**
 * A no-op implementation of {@link IPowerService} for environments where
 * power save blocking is not supported (e.g., web, headless, tests).
 */
export declare class NullPowerService implements IPowerService {
    readonly _serviceBrand: undefined;
    readonly onDidSuspend: Event<any>;
    readonly onDidResume: Event<any>;
    acquirePowerSaveBlocker(): IDisposable;
}
//# sourceMappingURL=powerService.d.ts.map