import { AfterContentInit, ElementRef, EventEmitter, OnChanges, OnDestroy } from '@angular/core';
import { GraniteChipListComponent } from './chip-list.component';
import * as i0 from "@angular/core";
export interface GraniteChipTextControl {
    /** Unique identifier for the text control. */
    id: string;
    /** The text control's placeholder text. */
    placeholder: string;
    /** Whether the text control has browser focus. */
    focused: boolean;
    /** Whether the text control is empty. */
    empty: boolean;
    /** Focuses the text control. */
    setFocus(options?: FocusOptions): void;
}
/** Represents an input event on a `graniteChipInput`. */
export interface GraniteChipInputEvent {
    /** The native `<input>` element that the event is being fired for. */
    input: HTMLInputElement;
    /** The value of the input. */
    value: string;
    /** Reference to the chip input that emitted the event. */
    chipInput: GraniteChipInputDirective;
}
export declare class GraniteChipInputDirective implements GraniteChipTextControl, OnChanges, OnDestroy, AfterContentInit {
    protected _elementRef: ElementRef<HTMLInputElement>;
    /** Unique id for the input. */
    id: string;
    /** The input's placeholder text. */
    placeholder: string;
    /** Emitted when a chip is to be added. */
    readonly graniteChipInputTokenEnd: EventEmitter<GraniteChipInputEvent>;
    /** Register input for chip list */
    set graniteChipInputFor(value: GraniteChipListComponent);
    /**
     * The list of key codes that will trigger a chipEnd event.
     *
     * Defaults to `[ENTER]`.
     */
    graniteChipInputSeparatorKeyCodes: readonly number[] | ReadonlySet<number>;
    /**
     * Whether or not the chipEnd event will be emitted when the input is blurred.
     */
    get graniteChipInputAddOnBlur(): boolean;
    set graniteChipInputAddOnBlur(value: boolean);
    _addOnBlur: boolean;
    /**
     * Whether this is a required field, currently we use it only for setting aria-required.
     */
    get required(): boolean;
    set required(value: boolean);
    /** The native input element to which this directive is attached. */
    readonly inputElement: HTMLInputElement;
    _chipList: GraniteChipListComponent;
    focused: boolean;
    protected _required: boolean | undefined;
    /** Whether the input is disabled. */
    get disabled(): boolean;
    set disabled(value: boolean);
    /** Whether the input is empty. */
    get empty(): boolean;
    private _disabled;
    /** Used to prevent focus moving to chips while user is holding backspace */
    private _focusLastChipOnBackspace;
    constructor(_elementRef: ElementRef<HTMLInputElement>);
    ngOnChanges(): void;
    ngOnDestroy(): void;
    ngAfterContentInit(): void;
    /** Utility method to make host definition/tests more clear. */
    _keydown(event?: KeyboardEvent): void;
    /**
     * Pass events to the keyboard manager. Available here for tests.
     */
    _keyup(event: KeyboardEvent): void;
    /** Checks to see if the blur should emit the (chipEnd) event. */
    _blur(): void;
    _focus(): void;
    /** Checks to see if the (chipEnd) event needs to be emitted. */
    _emitChipEnd(event?: KeyboardEvent): void;
    _onInput(): void;
    /** Focuses the input (called from parent level). */
    setFocus(options?: FocusOptions): void;
    /** Clears the input */
    clear(): void;
    /** Checks whether a keycode is one of the configured separators. */
    private _isSeparatorKey;
    static ɵfac: i0.ɵɵFactoryDeclaration<GraniteChipInputDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<GraniteChipInputDirective, "input[graniteChipInputFor]", ["graniteChipInput", "graniteChipInputFor"], { "id": { "alias": "id"; "required": false; }; "placeholder": { "alias": "placeholder"; "required": false; }; "graniteChipInputFor": { "alias": "graniteChipInputFor"; "required": false; }; "graniteChipInputSeparatorKeyCodes": { "alias": "graniteChipInputSeparatorKeyCodes"; "required": false; }; "graniteChipInputAddOnBlur": { "alias": "graniteChipInputAddOnBlur"; "required": false; }; "required": { "alias": "required"; "required": false; }; "disabled": { "alias": "disabled"; "required": false; }; }, { "graniteChipInputTokenEnd": "graniteChipInputTokenEnd"; }, never, never, false, never>;
}