import { FocusKeyManager } from '@angular/cdk/a11y';
import { Directionality } from '@angular/cdk/bidi';
import { SelectionModel } from '@angular/cdk/collections';
import { AfterContentInit, ChangeDetectorRef, DoCheck, ElementRef, OnDestroy, OnInit, QueryList, EventEmitter } from '@angular/core';
import { ControlValueAccessor, FormGroupDirective, NgControl, NgForm } from '@angular/forms';
import { Observable } from 'rxjs';
import { GraniteChipComponent, GraniteChipEvent, GraniteChipSelectionChangeEvent } from './chip.component';
import { GraniteChipTextControl } from './chip-input';
import * as i0 from "@angular/core";
declare abstract class GraniteChipListBase {
    _parentForm: NgForm;
    _parentFormGroup: FormGroupDirective;
    ngControl: NgControl;
    readonly stateChanges: EventEmitter<void>;
    constructor(_parentForm: NgForm, _parentFormGroup: FormGroupDirective, ngControl: NgControl);
}
export declare class GraniteChipListComponent extends GraniteChipListBase implements ControlValueAccessor, AfterContentInit, DoCheck, OnInit, OnDestroy {
    protected _elementRef: ElementRef<HTMLElement>;
    private _changeDetectorRef;
    private _dir;
    ariaLabel: string | null;
    ariaLabelledby: string | null;
    ariaOrientation: 'horizontal' | 'vertical';
    /** The chips contained within this chip list. */
    chips: QueryList<GraniteChipComponent>;
    readonly controlType: string;
    /** Uid of the chip list */
    _uid: string;
    /** Tab index for the chip list. */
    _tabIndex: number;
    /**
     * User defined tab index.
     * When it is not null, use user defined tab index. Otherwise use _tabIndex
     */
    _userTabIndex: number | null;
    /** The FocusKeyManager which handles focus. */
    _keyManager: FocusKeyManager<GraniteChipComponent>;
    _selectionModel: SelectionModel<GraniteChipComponent>;
    /** The chip input to add more chips */
    protected _chipInput: GraniteChipTextControl;
    protected _disabled: boolean;
    protected _selectable: boolean;
    /**
     * When a chip is destroyed, we store the index of the destroyed chip until the chips
     * query list notifies about the update. This is necessary because we cannot determine an
     * appropriate chip that should receive focus until the array of chips updated completely.
     */
    private _lastDestroyedChipIndex;
    /** Subject that emits when the component has been destroyed. */
    private readonly _destroyed;
    /** Subscription to focus changes in the chips. */
    private _chipFocusSubscription;
    /** Subscription to blur changes in the chips. */
    private _chipBlurSubscription;
    /** Subscription to selection changes in chips. */
    private _chipSelectionSubscription;
    /** Subscription to remove changes in chips. */
    private _chipRemoveSubscription;
    /** The ARIA role applied to the chip list. */
    get role(): string | null;
    set role(role: string | null);
    private _explicitRole?;
    /** Whether the user should be allowed to select multiselect chips. */
    get multiselect(): boolean;
    set multiselect(value: boolean);
    private _multiple;
    /**
     * Whether the chip list is disabled.
     */
    get disabled(): boolean;
    set disabled(value: boolean);
    /**
     * Whether or not this chip list is selectable. When a chip list is not selectable,
     * the selected states for all the chips inside the chip list are always ignored.
     */
    get selectable(): boolean;
    set selectable(value: boolean);
    set tabindex(value: number);
    /** Unique identifier for the chip list. */
    get id(): string;
    /** Whether any chips or the matChipInput inside of this chip-list has focus. */
    get focused(): boolean;
    /** Whether the chip list is empty. */
    get empty(): boolean;
    /** The array of selected chips inside chip list. */
    get selected(): GraniteChipComponent[] | GraniteChipComponent;
    /** Combined stream of all of the child chips' selection change events. */
    get chipSelectionChanges(): Observable<GraniteChipSelectionChangeEvent>;
    /** Combined stream of all of the child chips' focus change events. */
    get chipFocusChanges(): Observable<GraniteChipEvent>;
    /** Combined stream of all of the child chips' blur change events. */
    get chipBlurChanges(): Observable<GraniteChipEvent>;
    /** Combined stream of all of the child chips' remove change events. */
    get chipRemoveChanges(): Observable<GraniteChipEvent>;
    constructor(_elementRef: ElementRef<HTMLElement>, _changeDetectorRef: ChangeDetectorRef, _dir: Directionality, _parentForm: NgForm, _parentFormGroup: FormGroupDirective, ngControl: NgControl);
    /** Function when changed */
    _onChange: (value: any) => void;
    /** Function when changed */
    _onTouched: () => void;
    ngAfterContentInit(): void;
    ngOnInit(): void;
    ngDoCheck(): void;
    ngOnDestroy(): void;
    /** Associates an HTML input element with this chip list. */
    registerInput(inputElement: GraniteChipTextControl): void;
    writeValue(value: any): void;
    registerOnChange(fn: (value: any) => void): void;
    registerOnTouched(fn: () => void): void;
    setDisabledState(isDisabled: boolean): void;
    /**
     * Focus chip list when click on the container.
     */
    onContainerClick(event: MouseEvent): void;
    /**
     * Focuses the first non-disabled chip in this chip list, or the associated input when there
     * are no eligible chips.
     */
    focus(options?: FocusOptions): void;
    /** Attempt to focus an input if we have one. */
    _focusInput(options?: FocusOptions): void;
    /**
     * Pass events to the keyboard manager. Available here for tests.
     */
    _keydown(event: KeyboardEvent): void;
    /** When blurred, mark the field as touched when focus moved outside the chip list. */
    _blur(): void;
    /** Mark the field as touched */
    _markAsTouched(): void;
    /**
     * Removes the `tabindex` from the chip list and resets it back afterwards, allowing the
     * user to tab out of it. This prevents the list from capturing focus and redirecting
     * it back to the first chip, creating a focus trap, if it user tries to tab away.
     */
    _allowFocusEscape(): void;
    /**
     * Check the tab index as you should not be allowed to focus an empty list.
     */
    protected _updateTabIndex(): void;
    /**
     * If the amount of chips changed, we need to update the
     * key manager state and focus the next closest chip.
     */
    protected _updateFocusForDestroyedChips(): void;
    /**
     * Utility to ensure all indexes are valid.
     *
     * @param index The index to be checked.
     * @returns True if the index is valid for our list of chips.
     */
    private _isValidIndex;
    private _setSelectionByValue;
    /**
     * Finds and selects the chip based on its value.
     * @returns Chip that has the corresponding value.
     */
    private _selectValue;
    private _initializeSelection;
    /**
     * Deselects every chip in the list.
     * @param skip Chip that should not be deselected.
     */
    private _clearSelection;
    /**
     * Sorts the model values, ensuring that they keep the same
     * order that they have in the panel.
     */
    private _sortValues;
    private _compareWith;
    private _resetChips;
    private _dropSubscriptions;
    /** Listens to user-generated selection events on each chip. */
    private _listenToChipsSelection;
    /** Listens to user-generated selection events on each chip. */
    private _listenToChipsFocus;
    private _listenToChipsRemoved;
    /** Checks whether an event comes from inside a chip element. */
    private _originatesFromChip;
    /** Checks whether any of the chips is focused. */
    private _hasFocusedChip;
    /** Syncs the list's state with the individual chips. */
    private _syncChipsState;
    static ɵfac: i0.ɵɵFactoryDeclaration<GraniteChipListComponent, [null, null, { optional: true; }, { optional: true; }, { optional: true; }, { optional: true; self: true; }]>;
    static ɵcmp: i0.ɵɵComponentDeclaration<GraniteChipListComponent, "granite-chip-list", ["graniteChipList"], { "ariaLabel": { "alias": "aria-label"; "required": false; }; "ariaLabelledby": { "alias": "aria-labelledby"; "required": false; }; "ariaOrientation": { "alias": "aria-orientation"; "required": false; }; "role": { "alias": "role"; "required": false; }; "multiselect": { "alias": "multiselect"; "required": false; }; "disabled": { "alias": "disabled"; "required": false; }; "selectable": { "alias": "selectable"; "required": false; }; "tabindex": { "alias": "tabindex"; "required": false; }; }, {}, ["chips"], ["*"], false, never>;
}
export {};