import { OnDestroy, ElementRef, EventEmitter } from '@angular/core';
import { Ng2VkService } from '../services/virtual-keyboard.service';
import { Ng2VkEnterEvent } from '../models/key-event.model';
export declare abstract class AbstractAfVkInputDirective<T extends HTMLInputElement | HTMLTextAreaElement> implements OnDestroy {
    protected _el: ElementRef<T>;
    protected _service: Ng2VkService;
    protected _input: T;
    protected _active: boolean;
    protected _position: number;
    protected _selection: {
        start: number;
        end: number;
    };
    protected _selectionDirection: 'left' | 'right';
    id: number;
    enter$: EventEmitter<Ng2VkEnterEvent>;
    valueChanges$: EventEmitter<string>;
    constructor(_el: ElementRef<T>, _service: Ng2VkService);
    onBlur(): void;
    onFocus(): void;
    ngOnDestroy(): void;
    setActive(active: boolean): void;
    isActive(): boolean;
    getInput(): T;
    protected _registerInput(): void;
    protected _handleFocus(): void;
    protected _handleKeypress(key: string): void;
    protected _handleBackspace({ before, after }: {
        before: any;
        after: any;
    }): void;
    protected _handleLetter(key: any, { before, after }: {
        before: any;
        after: any;
    }): void;
    protected _handleSpace({ before, after }: {
        before: any;
        after: any;
    }): void;
    protected _handleTab(): void;
    protected _handleLeft(): void;
    protected _handleRight(): void;
    protected _handleEnter({ before, after }: {
        before: any;
        after: any;
    }): void;
    protected _makeSelection(direction: 'left' | 'right'): void;
    protected _setCaret(direction?: 'left' | 'right' | 'center'): void;
}
export declare class AfVkInputDirectives {
    static inputs: AbstractAfVkInputDirective<HTMLInputElement | HTMLTextAreaElement>[];
    static getActiveInput(): AbstractAfVkInputDirective<HTMLInputElement | HTMLTextAreaElement>;
}