import { ViewportRuler } from '@angular/cdk/scrolling';
import { ChangeDetectorRef, ElementRef, EventEmitter, OnDestroy, OnInit, QueryList } from '@angular/core';
import { ControlValueAccessor, FormControl } from '@angular/forms';
import { MatOption } from '@angular/material/core';
import { MatFormField } from '@angular/material/form-field';
import { MatSelect } from '@angular/material/select';
import { AswSelectNoEntriesFoundDirective, AswSelectSearchClearDirective } from '@asoftwareworld/form-builder-pro/common';
import { BehaviorSubject, Observable } from 'rxjs';
import { AswSelectSearchOptions } from './select-search-options';
import * as i0 from "@angular/core";
export declare class AswSelectSearch implements OnInit, OnDestroy, ControlValueAccessor {
    matSelect: MatSelect;
    changeDetectorRef: ChangeDetectorRef;
    private _viewportRuler;
    matOption: MatOption;
    matFormField: MatFormField;
    /** Label of the search placeholder */
    placeholderLabel: string;
    /** Type of the search input field */
    type: string;
    /** Font-based icon used for displaying Close-Icon */
    closeIcon: string;
    /** Svg-based icon used for displaying Close-Icon. If set, closeIcon is overridden */
    closeSvgIcon: string;
    /** Label to be shown when no entries are found. Set to null if no message should be shown. */
    noEntriesFoundLabel: string;
    /**
     * Whether or not the search field should be cleared after the dropdown menu is closed.
     */
    clearSearchInput: boolean;
    /** Whether to show the search-in-progress indicator */
    searching: boolean;
    /** Disables initial focusing of the input field */
    disableInitialFocus: boolean;
    /** Enable clear input on escape pressed */
    enableClearOnEscapePressed: boolean;
    /**
     * Prevents home / end key being propagated to mat-select,
     * allowing to move the cursor within the search input instead of navigating the options
     */
    preventHomeEndKeyPropagation: boolean;
    /** Disables scrolling to active options when option list changes. Useful for server-side search */
    disableScrollToActiveOnOptionsChanged: boolean;
    /** Adds 508 screen reader support for search box */
    ariaLabel: string;
    /** Whether to show Select All Checkbox (for mat-select[multi=true]) */
    showToggleAllCheckbox: boolean;
    /** select all checkbox checked state */
    toggleAllCheckboxChecked: boolean;
    /** select all checkbox indeterminate state */
    toggleAllCheckboxIndeterminate: boolean;
    /** Display a message in a tooltip on the toggle-all checkbox */
    toggleAllCheckboxTooltipMessage: string;
    /** Define the position of the tooltip on the toggle-all checkbox. */
    toggleAllCheckboxTooltipPosition: 'left' | 'right' | 'above' | 'below' | 'before' | 'after';
    /** Show/Hide the search clear button of the search input */
    hideClearSearchButton: boolean;
    /**
     * Always restore selected options on selectionChange for mode multi (e.g. for lazy loading/infinity scrolling).
     * Defaults to false, so selected options are only restored while filtering is active.
     */
    alwaysRestoreSelectedOptionsMulti: boolean;
    /** Output emitter to send to parent component with the toggle all boolean */
    toggleAll: EventEmitter<boolean>;
    /** Reference to the search input field */
    searchSelectInput?: ElementRef;
    /** Reference to the search input field */
    innerSelectSearch?: ElementRef;
    /** Reference to custom search input clear icon */
    clearIcon?: AswSelectSearchClearDirective;
    /** Reference to custom no entries found element */
    noEntriesFound?: AswSelectNoEntriesFoundDirective;
    /** Current search value */
    get value(): string | null;
    private _lastExternalInputValue?;
    onTouched: Function;
    /** Reference to the MatSelect options */
    set _options(_options: QueryList<MatOption>);
    get _options(): QueryList<MatOption>;
    _options$: BehaviorSubject<QueryList<MatOption>>;
    private optionsList$;
    private optionsLength$;
    /** Previously selected values when using <mat-select [multiple]="true">*/
    private previousSelectedValues;
    _formControl: FormControl<string | null>;
    /** whether to show the no entries found message */
    _showNoEntriesFound$: Observable<boolean | '' | null>;
    /** Subject that emits when the component has been destroyed. */
    private _onDestroy;
    /** Reference to active descendant for ARIA Support. */
    private activeDescendant?;
    constructor(matSelect: MatSelect, changeDetectorRef: ChangeDetectorRef, _viewportRuler: ViewportRuler, matOption: MatOption, matFormField: MatFormField, defaultOptions: AswSelectSearchOptions);
    private applyDefaultOptions;
    ngOnInit(): void;
    _emitSelectAllBooleanToParent(state: boolean): void;
    ngOnDestroy(): void;
    _isToggleAllCheckboxVisible(): boolean;
    /**
     * Handles the key down event with MatSelect.
     * Allows e.g. selecting with enter key, navigation with arrow keys, etc.
     * @param event
     */
    _handleKeydown(event: KeyboardEvent): void;
    /**
     * Handles the key up event with MatSelect.
     * Allows e.g. the announcing of the currently activeDescendant by screen readers.
     */
    _handleKeyup(event: KeyboardEvent): void;
    writeValue(value: string): void;
    onBlur(): void;
    registerOnChange(fn: (value: string | null) => void): void;
    registerOnTouched(fn: Function): void;
    /**
     * Focuses the search input field
     */
    _focus(): void;
    /**
     * Resets the current search value
     * @param focus whether to focus after resetting
     */
    _reset(focus?: boolean): void;
    /**
     * Initializes handling <mat-select [multiple]="true">
     * Note: to improve this code, mat-select should be extended to allow disabling resetting the selection while filtering.
     */
    private initMultipleHandling;
    /**
     *  Set the width of the innerSelectSearch to fit even custom scrollbars
     *  And support all Operation Systems
     */
    updateInputWidth(): void;
    /**
     * Determine the offset to length that can be caused by the optional matOption used as a search input.
     */
    private getOptionsLengthOffset;
    private unselectActiveDescendant;
    static ɵfac: i0.ɵɵFactoryDeclaration<AswSelectSearch, [null, null, null, { optional: true; }, { optional: true; }, { optional: true; }]>;
    static ɵcmp: i0.ɵɵComponentDeclaration<AswSelectSearch, "asw-select-search", never, { "placeholderLabel": { "alias": "placeholderLabel"; "required": false; }; "type": { "alias": "type"; "required": false; }; "closeIcon": { "alias": "closeIcon"; "required": false; }; "closeSvgIcon": { "alias": "closeSvgIcon"; "required": false; }; "noEntriesFoundLabel": { "alias": "noEntriesFoundLabel"; "required": false; }; "clearSearchInput": { "alias": "clearSearchInput"; "required": false; }; "searching": { "alias": "searching"; "required": false; }; "disableInitialFocus": { "alias": "disableInitialFocus"; "required": false; }; "enableClearOnEscapePressed": { "alias": "enableClearOnEscapePressed"; "required": false; }; "preventHomeEndKeyPropagation": { "alias": "preventHomeEndKeyPropagation"; "required": false; }; "disableScrollToActiveOnOptionsChanged": { "alias": "disableScrollToActiveOnOptionsChanged"; "required": false; }; "ariaLabel": { "alias": "ariaLabel"; "required": false; }; "showToggleAllCheckbox": { "alias": "showToggleAllCheckbox"; "required": false; }; "toggleAllCheckboxChecked": { "alias": "toggleAllCheckboxChecked"; "required": false; }; "toggleAllCheckboxIndeterminate": { "alias": "toggleAllCheckboxIndeterminate"; "required": false; }; "toggleAllCheckboxTooltipMessage": { "alias": "toggleAllCheckboxTooltipMessage"; "required": false; }; "toggleAllCheckboxTooltipPosition": { "alias": "toggleAllCheckboxTooltipPosition"; "required": false; }; "hideClearSearchButton": { "alias": "hideClearSearchButton"; "required": false; }; "alwaysRestoreSelectedOptionsMulti": { "alias": "alwaysRestoreSelectedOptionsMulti"; "required": false; }; }, { "toggleAll": "toggleAll"; }, ["clearIcon", "noEntriesFound"], ["[aswSelectSearchClear]", ".mat-select-search-custom-header-content", "[aswSelectNoEntriesFound]"], false, never>;
}