import { ComponentFactoryResolver, ElementRef, EventEmitter, Injector, OnDestroy, ViewContainerRef } from '@angular/core';
import { TextInputAutocompleteMenuComponent } from './text-input-autocomplete-menu.component';
export interface ChoiceSelectedEvent {
    choice: any;
    insertedAt: {
        start: number;
        end: number;
    };
}
export declare class TextInputAutocompleteDirective implements OnDestroy {
    private componentFactoryResolver;
    private viewContainerRef;
    private injector;
    private elm;
    /**
     * The character that will trigger the menu to appear
     */
    triggerCharacter: string;
    /**
     * An optional keyboard shortcut that will trigger the menu to appear
     */
    keyboardShortcut: (event: KeyboardEvent) => boolean;
    /**
     * The regular expression that will match the search text after the trigger character
     */
    searchRegexp: RegExp;
    /**
     * Whether to close the menu when the host textarea loses focus
     */
    closeMenuOnBlur: boolean;
    /**
     * The menu component to show with available options.
     * You can extend the built in `TextInputAutocompleteMenuComponent` component to use a custom template
     */
    menuComponent: typeof TextInputAutocompleteMenuComponent;
    /**
     * Called when the options menu is shown
     */
    menuShown: EventEmitter<{}>;
    /**
     * Called when the options menu is hidden
     */
    menuHidden: EventEmitter<{}>;
    /**
     * Called when a choice is selected
     */
    choiceSelected: EventEmitter<ChoiceSelectedEvent>;
    /**
     * A function that accepts a search string and returns an array of choices. Can also return a promise.
     */
    findChoices: (searchText: string) => any[] | Promise<any[]>;
    /**
     * A function that formats the selected choice once selected.
     */
    getChoiceLabel: (choice: any) => string;
    private menu;
    private menuHidden$;
    private usingShortcut;
    constructor(componentFactoryResolver: ComponentFactoryResolver, viewContainerRef: ViewContainerRef, injector: Injector, elm: ElementRef);
    onKeypress(key: string): void;
    onKeyDown(event: KeyboardEvent): void;
    onChange(value: string): void;
    onBlur(): void;
    private showMenu();
    getLineHeight(elm: HTMLElement): number;
    private hideMenu();
    ngOnDestroy(): void;
}