import { ScreenEvent } from '../reducers/screen';
export interface TimeEvent {
    type: 'start' | 'stop' | 'show' | 'hide';
    time: Date;
}
/**
 * Checks if there is a stop time present.
 */
export declare function hasFinalStopTime(times: TimeEvent[]): boolean;
/**
 * Sets any values that are unrealistically high to zero.
 */
export declare function discardUnrealisticallyHighInscreen(inscreenTime: number): number;
export interface EventTimeInput {
    times: TimeEvent[];
    screenEvents?: ScreenEvent[];
    now?: Date;
    maxIdleTime?: number;
}
/**
 * Calculates the total inscreen time in milliseconds from
 * a list of start and end times.
 */
export declare function calculateEventTime(input: EventTimeInput): number;