import { LitElement, PropertyValues } from 'lit';
import { OverlayContainer } from '../../shared/overlay/portal';
declare const FILTER_MODES: readonly ["none", "prefix", "contains"];
type FilterMode = (typeof FILTER_MODES)[number];
/**
 * `web-ui-autocomplete`：可输入并过滤候选的单值选择器。
 *
 * 与 `web-ui-select` 共用 `<web-ui-option>` 子项注册协议与浮层能力，但触发区是
 * 可编辑输入框：`value` 即当前输入文本（表单值），键入时按 `filter` 模式过滤候选，
 * 选择 option 时文本回填为该项 label，`selected-value` 暴露该项的 value。
 */
export declare class WebUiAutocomplete extends LitElement {
    static styles: import('lit').CSSResult[];
    static formAssociated: boolean;
    placeholder: string;
    disabled: boolean;
    readonly: boolean;
    required: boolean;
    portal: boolean;
    noScrollLock: boolean;
    overlayContainer?: OverlayContainer;
    name: string;
    ariaLabel: string | null;
    ariaLabelledby: string | undefined;
    private _filter;
    get filter(): FilterMode;
    set filter(v: string);
    private _value;
    get value(): string;
    set value(v: string);
    private _selectedValue;
    get selectedValue(): string;
    private _setSelectedValue;
    private readonly _formAssociation;
    private readonly _formAssociationController;
    private get _isDisabled();
    private _isOpen;
    private _activeIndex;
    private _focused;
    private static _nextInstanceId;
    private readonly _idPrefix;
    private readonly _a11yOptionIds;
    private _nextA11yOptionId;
    private _options;
    private _portal?;
    private _portalContent?;
    private readonly _scrollLock;
    private readonly _optionPortal;
    private readonly _panel;
    get isOpen(): boolean;
    get open(): boolean;
    private _onClickOutside;
    private _onFocusOut;
    private _handlePanelPointerDown;
    connectedCallback(): void;
    attributeChangedCallback(name: string, oldValue: string | null, newValue: string | null): void;
    disconnectedCallback(): void;
    firstUpdated(): void;
    willUpdate(): void;
    updated(changed: PropertyValues): void;
    formResetCallback(): void;
    formDisabledCallback(disabled: boolean): void;
    formStateRestoreCallback(state: string | File | FormData | null): void;
    private _syncValidity;
    private _syncOpenAttribute;
    private _syncSelectedValue;
    private _syncOptionA11y;
    private _getA11yOptionId;
    private _applyFilter;
    private _syncEmptyState;
    private _bindOption;
    private _unbindOption;
    private _refreshOptions;
    private _handleOptionClick;
    private _onOptionUpdate;
    private _handleOptionPointerOver;
    private _handleOptionPointerDown;
    private _onSlotChange;
    private _onKeydown;
    private _navigateActive;
    private _setInitialActiveOption;
    private _syncActiveOption;
    private _selectOption;
    private _onInput;
    private _onInnerChange;
    private _onFocus;
    private _onBlur;
    private _open;
    private _close;
    private _dispatchOpenChange;
    private _openOverlay;
    private _closeOverlay;
    private _reconfigureOverlay;
    private _syncScrollLock;
    private _createPortal;
    private _getLabelledbyText;
    render(): import('lit').TemplateResult<1>;
    readonly $events: {
        input: Event;
        change: Event;
        focus: FocusEvent;
        blur: FocusEvent;
        'open-change': CustomEvent<{
            open: boolean;
        }>;
    };
}
declare global {
    interface HTMLElementTagNameMap {
        'web-ui-autocomplete': WebUiAutocomplete;
    }
}
export {};