import { DialogValues } from "..";
import * as vscode from "vscode";
/**
 * The options of any input element.
 */
export interface InputBaseOptions {
    /**
     * The unique name which is needed to store the values.
     * This should be unique among all inputs from one multi-step input.
     */
    readonly name: string;
    /**
     * Function that should be executed before the input is shown.
     *
     * This function can be used the check, if the input should be shown or not. If the function returns `true`, then it should be shown.
     *
     * @param dialogValues - the current values of the dialog
     * @returns `true` if the dialog should be shown, `false`, if this dialog should be skipped
     */
    readonly onBeforeInput?: (dialogValues: DialogValues) => boolean;
    /**
     * Function that should be executed after the input was shown and the new value was saved into the dialog values.
     *
     * This can be for example used, if you get a value from any dialog values normal input that should be used as an uri instead.
     *
     * @param dialogValues - the current values of the dialog
     */
    readonly onAfterInput?: (dialogValues: DialogValues) => void;
}
/**
 * Indicates, that a action was triggered by the input.
 */
export declare enum InputAction {
    /**
     * When the back button was triggered.
     */
    BACK = "BACK"
}
/**
 * Any input for the extension.
 */
export declare abstract class InputBase<T extends InputBaseOptions> {
    /**
     * The options of any input element.
     */
    inputOptions: T;
    /**
     * The items that need to be disposed after the `showDialog` was called.
     */
    protected disposables: vscode.Disposable[];
    /**
     * Constructor.
     *
     * @param inputOptions - the options of any input element
     */
    constructor(inputOptions: T);
    /**
     * Shows the dialog and returns the result of it.
     *
     * **Note:** If you override this method, you will need async.
     *
     * @param currentResults - the current results of the dialog
     * @param title - the title of the dialog. This should not be changed, but used as is. This title is the same for every input and contains the step count.
     * @param showBackButton - indicator, if the back button should be shown. It should not be shown, if this is the first step.
     * Some input types does not support a back button. If the input supports a back button, then it should be shown according to this flag.
     * @returns the inputted value or undefined, when any error / invalid input occurs
     */
    abstract showDialog(currentResults: DialogValues, title: string, showBackButton: boolean): Promise<string | string[] | boolean | undefined | InputAction.BACK>;
    /**
     * Disposes everything from the given input after the dialog was shown and the values was received.
     */
    dispose(): void;
}