import { BooleanInput } from '@angular/cdk/coercion';
import { SelectionModel } from '@angular/cdk/collections';
import { ChangeDetectorRef, DoCheck, ElementRef, EventEmitter, OnChanges, OnDestroy, OnInit, SimpleChanges } from '@angular/core';
import { ControlValueAccessor, FormGroupDirective, NgControl, NgForm } from '@angular/forms';
import { SbbAutocomplete, SbbAutocompleteOrigin } from '@sbb-esta/angular-business/autocomplete';
import { CanUpdateErrorState, CanUpdateErrorStateCtor } from '@sbb-esta/angular-core/common-behaviors';
import { SbbErrorStateMatcher } from '@sbb-esta/angular-core/error';
import { SbbFormFieldControl } from '@sbb-esta/angular-core/forms';
import { Subject } from 'rxjs';
/** Change event object that is emitted when the chip-input value has changed. */
export declare class SbbChipInputChange {
    /** Reference to the chip-input that emitted the change event. */
    source: SbbChipInput;
    /** Current value of the chip-input that emitted the event. */
    value: string[];
    constructor(
    /** Reference to the chip-input that emitted the change event. */
    source: SbbChipInput, 
    /** Current value of the chip-input that emitted the event. */
    value: string[]);
}
/** @docs-private */
export declare class SbbChipsBase {
    _elementRef: ElementRef;
    _defaultErrorStateMatcher: SbbErrorStateMatcher;
    _parentForm: NgForm;
    _parentFormGroup: FormGroupDirective;
    ngControl: NgControl;
    constructor(_elementRef: ElementRef, _defaultErrorStateMatcher: SbbErrorStateMatcher, _parentForm: NgForm, _parentFormGroup: FormGroupDirective, ngControl: NgControl);
}
export declare const SbbChipsMixinBase: CanUpdateErrorStateCtor & typeof SbbChipsBase;
export declare class SbbChipInput extends SbbChipsMixinBase implements SbbFormFieldControl<any>, OnInit, DoCheck, OnDestroy, OnChanges, CanUpdateErrorState, ControlValueAccessor {
    ngControl: NgControl;
    private _changeDetectorRef;
    /** Optional autocomplete Component */
    autocomplete: SbbAutocomplete;
    /** Disables the chip input */
    get disabled(): any;
    set disabled(value: any);
    private _disabled;
    /** Unique id of the element. */
    get id(): string;
    set id(value: string);
    private _id;
    /** Id for the inner input field. */
    get inputId(): string;
    /** Whether filling out the chip-input is required in the form. */
    get required(): boolean;
    set required(value: boolean);
    private _required;
    /** Reference to the input element. */
    _inputElement: ElementRef;
    /** Value of the chip input control. */
    get value(): any;
    set value(newValue: any);
    private _value;
    /** Whether the chip-input has a value. */
    get empty(): boolean;
    /**
     * Event that emits whenever the raw value of the chip-input changes. This is here primarily
     * to facilitate the two-way binding for the `value` input.
     * @docs-private
     */
    readonly valueChange: EventEmitter<any>;
    /** Whether the select is focused. */
    get focused(): boolean;
    private _focused;
    inputModel: string;
    selectionModel: SelectionModel<string>;
    /** Emits when the state of the option changes and any parents have to be notified. */
    readonly stateChanges: Subject<void>;
    /** The element reference for the autocomplete origin. */
    readonly _origin: SbbAutocompleteOrigin;
    /** The aria-describedby attribute on the chip-input for improved a11y. */
    _ariaDescribedby: string;
    /** Unique id for this input. */
    private _uniqueId;
    private _destroyed;
    /** `View -> model callback called when value changes` */
    private _onTouched;
    /** `View -> model callback called when chip input has been touched` */
    private _onChange;
    constructor(ngControl: NgControl, _changeDetectorRef: ChangeDetectorRef, elementRef: ElementRef, defaultErrorStateMatcher: SbbErrorStateMatcher, parentForm: NgForm, parentFormGroup: FormGroupDirective);
    ngOnInit(): void;
    ngDoCheck(): void;
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    /**
     * Sets the chip input's value. Part of the ControlValueAccessor interface
     * required to integrate with Angular's core forms API.
     *
     * @param value New value to be written to the model.
     */
    writeValue(value: string[]): void;
    /**
     * Disables the chip input. Part of the ControlValueAccessor interface required
     * to integrate with Angular's core forms API.
     *
     * @param isDisabled Sets whether the component is disabled.
     */
    setDisabledState(isDisabled: boolean): void;
    /** Adds a given value to the current selected values. */
    _onSelect(option: string): void;
    /** Handle the keydown event. */
    _handleKeydown(event: KeyboardEvent): void;
    /** Removes a given value from the current selected values. */
    deselectOption(option: string): void;
    /**
     * Saves a callback function to be invoked when the chip input's value
     * changes from user input. Part of the ControlValueAccessor interface
     * required to integrate with Angular's core forms API.
     *
     * @param fn Callback to be triggered when the value changes.
     */
    registerOnChange(fn: any): void;
    /**
     * Saves a callback function to be invoked when the chip input is blurred
     * by the user. Part of the ControlValueAccessor interface required
     * to integrate with Angular's core forms API.
     *
     * @param fn Callback to be triggered when the component has been touched.
     */
    registerOnTouched(fn: any): void;
    /**
     * Implemented as part of SbbFormFieldControl.
     * @docs-private
     */
    setDescribedByIds(ids: string[]): void;
    /**
     * Forward focus if a user clicks on an associated label.
     * Implemented as part of SbbFormFieldControl.
     * @docs-private
     */
    onContainerClick(event: Event): void;
    /** Emits change event to set the model value. */
    private _propagateChanges;
    /** @docs-private */
    _onBlur(): void;
    /** @docs-private */
    _onFocus(): void;
    static ngAcceptInputType_disabled: BooleanInput;
    static ngAcceptInputType_required: BooleanInput;
}