import { Point } from './point';
export declare const GESTURE_STRATEGY_FLAG: {
    KEEP: number;
    REMOVE_IF_POINTERS_GT: number;
};
export declare const RETURN_FLAG: {
    map(result: number | boolean): number;
    IDLE: number;
    START_EMITTED: number;
    REMOVE: number;
    REMOVE_OTHERS: number;
    REMOVE_AND_CONTINUE: number;
    COMPOSE: number;
};
export interface Supports {
    msPointerEnabled: boolean;
    pointerEnabled: boolean;
    touchEnabled: boolean;
}
export declare const SUPPORTS: Supports;
export declare function isMouse(evt: any, supports?: Supports): boolean;
export declare function isValidMouseButton({button, which}: {
    button?: number | undefined;
    which?: number | undefined;
}, allowedBtn: number[] | number): boolean;
export declare function matchesSelector(element: any, selector: string): any;
export interface PointerData {
    page: Point;
    client: Point;
}
export declare class PointerDataMap extends Map<number, PointerData> {
}
export interface Pointers {
    all: PointerDataMap;
    changed: PointerDataMap;
}
export declare class Options {
    pointers: number;
    which: number;
    prio: number;
    strategy: number;
}
export declare class Data {
    pointers: PointerData[];
}
export declare function ensureProperties<T1, T2 extends T1>(target: T2, source: T2): T1 & T2;