import { ElementRef, Injector } from '@angular/core';
import { Overlay } from '@angular/cdk/overlay';
import { CustomEditStepRef } from './custom-edit-step-ref';
import { CUSTOM_EDIT_STEP_EDIT_IN_DEPTH, CustomEditStepData } from './custom-edit-step-data';
import * as i0 from "@angular/core";
export declare type CustomEditStepResult = string | undefined | typeof CUSTOM_EDIT_STEP_EDIT_IN_DEPTH;
export declare class CustomEditStepService {
    private readonly overlay;
    private readonly injector;
    /** Currently open Step Description overlay ref; only one panel is allowed at a time. */
    private currentRef;
    constructor(overlay: Overlay, injector: Injector);
    /**
     * Opens the Step Description modal positioned just below the given origin element.
     * If a panel is already open, returns the existing ref and does not open a duplicate.
     * @param origin Element (e.g. description span or edit icon) to position below
     * @param data Initial description and optional help URL
     * @returns Ref with afterClosed() and close(); afterClosed emits the new description on Apply, undefined on Cancel, or EDIT_IN_DEPTH symbol when user clicks "Edit in depth"
     */
    open(origin: ElementRef<HTMLElement>, data: CustomEditStepData): CustomEditStepRef<CustomEditStepResult>;
    static ɵfac: i0.ɵɵFactoryDeclaration<CustomEditStepService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<CustomEditStepService>;
}