import { Observable } from '@tanbo/stream';
import { Rect } from './_utils/uikit';
export interface CaretLimit {
    top: number;
    bottom: number;
}
export interface CaretPosition {
    left: number;
    top: number;
    height: number;
}
export declare function caretPositionEqual(a: CaretPosition | null, b: CaretPosition | null): boolean;
export interface Caret {
    onPositionChange: Observable<CaretPosition | null>;
    readonly rect: Rect;
    refresh(): void;
}
export declare abstract class Input {
    /**
     * @experimental
     */
    abstract composition: boolean;
    /**
     * @experimental
     */
    abstract onReady: Promise<void>;
    abstract caret: Caret;
    abstract disabled: boolean;
    abstract focus(nativeRange: Range, reFlash: boolean): void;
    abstract blur(): void;
    abstract destroy(): void;
}