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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport { Directionality } from '@angular/cdk/bidi';\nimport { BooleanInput, NumberInput } from '@angular/cdk/coercion';\nimport { AfterViewInit, ChangeDetectorRef, ElementRef, EventEmitter, InjectionToken, OnChanges, OnDestroy, QueryList, TemplateRef, AfterContentInit } from '@angular/core';\nimport { Observable, Subject } from 'rxjs';\nimport { CdkStepHeader } from './step-header';\nimport { CdkStepLabel } from './step-label';\n/**\n * Position state of the content of each step in stepper that is used for transitioning\n * the content into correct position upon step selection change.\n */\nexport declare type StepContentPositionState = 'previous' | 'current' | 'next';\n/** Possible orientation of a stepper. */\nexport declare type StepperOrientation = 'horizontal' | 'vertical';\n/** Change event emitted on selection changes. */\nexport declare class StepperSelectionEvent {\n    /** Index of the step now selected. */\n    selectedIndex: number;\n    /** Index of the step previously selected. */\n    previouslySelectedIndex: number;\n    /** The step instance now selected. */\n    selectedStep: CdkStep;\n    /** The step instance previously selected. */\n    previouslySelectedStep: CdkStep;\n}\n/** The state of each step. */\nexport declare type StepState = 'number' | 'edit' | 'done' | 'error' | string;\n/** Enum to represent the different states of the steps. */\nexport declare const STEP_STATE: {\n    NUMBER: string;\n    EDIT: string;\n    DONE: string;\n    ERROR: string;\n};\n/** InjectionToken that can be used to specify the global stepper options. */\nexport declare const STEPPER_GLOBAL_OPTIONS: InjectionToken<StepperOptions>;\n/** Configurable options for stepper. */\nexport interface StepperOptions {\n    /**\n     * Whether the stepper should display an error state or not.\n     * Default behavior is assumed to be false.\n     */\n    showError?: boolean;\n    /**\n     * Whether the stepper should display the default indicator type\n     * or not.\n     * Default behavior is assumed to be true.\n     */\n    displayDefaultIndicatorType?: boolean;\n}\nexport declare class CdkStep implements OnChanges {\n    _stepper: CdkStepper;\n    private _stepperOptions;\n    _displayDefaultIndicatorType: boolean;\n    /** Template for step label if it exists. */\n    stepLabel: CdkStepLabel;\n    /** Template for step content. */\n    content: TemplateRef<any>;\n    /** The top level abstract control of the step. */\n    stepControl: AbstractControlLike;\n    /** Whether user has attempted to move away from the step. */\n    interacted: boolean;\n    /** Emits when the user has attempted to move away from the step. */\n    readonly interactedStream: EventEmitter<CdkStep>;\n    /** Plain text label of the step. */\n    label: string;\n    /** Error message to display when there's an error. */\n    errorMessage: string;\n    /** Aria label for the tab. */\n    ariaLabel: string;\n    /**\n     * Reference to the element that the tab is labelled by.\n     * Will be cleared if `aria-label` is set at the same time.\n     */\n    ariaLabelledby: string;\n    /** State of the step. */\n    state: StepState;\n    /** Whether the user can return to this step once it has been marked as completed. */\n    get editable(): boolean;\n    set editable(value: boolean);\n    private _editable;\n    /** Whether the completion of step is optional. */\n    get optional(): boolean;\n    set optional(value: boolean);\n    private _optional;\n    /** Whether step is marked as completed. */\n    get completed(): boolean;\n    set completed(value: boolean);\n    _completedOverride: boolean | null;\n    private _getDefaultCompleted;\n    /** Whether step has an error. */\n    get hasError(): boolean;\n    set hasError(value: boolean);\n    private _customError;\n    private _getDefaultError;\n    constructor(_stepper: CdkStepper, stepperOptions?: StepperOptions);\n    /** Selects this step component. */\n    select(): void;\n    /** Resets the step to its initial state. Note that this includes resetting form data. */\n    reset(): void;\n    ngOnChanges(): void;\n    _markAsInteracted(): void;\n    /** Determines whether the error state can be shown. */\n    _showError(): boolean;\n    static ngAcceptInputType_editable: BooleanInput;\n    static ngAcceptInputType_hasError: BooleanInput;\n    static ngAcceptInputType_optional: BooleanInput;\n    static ngAcceptInputType_completed: BooleanInput;\n}\nexport declare class CdkStepper implements AfterContentInit, AfterViewInit, OnDestroy {\n    private _dir;\n    private _changeDetectorRef;\n    private _elementRef;\n    /** Emits when the component is destroyed. */\n    protected readonly _destroyed: Subject<void>;\n    /** Used for managing keyboard focus. */\n    private _keyManager;\n    /** Full list of steps inside the stepper, including inside nested steppers. */\n    _steps: QueryList<CdkStep>;\n    /** Steps that belong to the current stepper, excluding ones from nested steppers. */\n    readonly steps: QueryList<CdkStep>;\n    /** The list of step headers of the steps in the stepper. */\n    _stepHeader: QueryList<CdkStepHeader>;\n    /** List of step headers sorted based on their DOM order. */\n    private _sortedHeaders;\n    /** Whether the validity of previous steps should be checked or not. */\n    get linear(): boolean;\n    set linear(value: boolean);\n    private _linear;\n    /** The index of the selected step. */\n    get selectedIndex(): number;\n    set selectedIndex(index: number);\n    private _selectedIndex;\n    /** The step that is selected. */\n    get selected(): CdkStep | undefined;\n    set selected(step: CdkStep | undefined);\n    /** Event emitted when the selected step has changed. */\n    readonly selectionChange: EventEmitter<StepperSelectionEvent>;\n    /** Used to track unique ID for each stepper component. */\n    _groupId: number;\n    /** Orientation of the stepper. */\n    get orientation(): StepperOrientation;\n    set orientation(value: StepperOrientation);\n    /**\n     * @deprecated To be turned into a private property. Use `orientation` instead.\n     * @breaking-change 13.0.0\n     */\n    protected _orientation: StepperOrientation;\n    constructor(_dir: Directionality, _changeDetectorRef: ChangeDetectorRef, _elementRef: ElementRef<HTMLElement>, \n    /**\n     * @deprecated No longer in use, to be removed.\n     * @breaking-change 13.0.0\n     */\n    _document: any);\n    ngAfterContentInit(): void;\n    ngAfterViewInit(): void;\n    ngOnDestroy(): void;\n    /** Selects and focuses the next step in list. */\n    next(): void;\n    /** Selects and focuses the previous step in list. */\n    previous(): void;\n    /** Resets the stepper to its initial state. Note that this includes clearing form data. */\n    reset(): void;\n    /** Returns a unique id for each step label element. */\n    _getStepLabelId(i: number): string;\n    /** Returns unique id for each step content element. */\n    _getStepContentId(i: number): string;\n    /** Marks the component to be change detected. */\n    _stateChanged(): void;\n    /** Returns position state of the step with the given index. */\n    _getAnimationDirection(index: number): StepContentPositionState;\n    /** Returns the type of icon to be displayed. */\n    _getIndicatorType(index: number, state?: StepState): StepState;\n    private _getDefaultIndicatorLogic;\n    private _getGuidelineLogic;\n    private _isCurrentStep;\n    /** Returns the index of the currently-focused step header. */\n    _getFocusIndex(): number | null;\n    private _updateSelectedItemIndex;\n    _onKeydown(event: KeyboardEvent): void;\n    private _anyControlsInvalidOrPending;\n    private _layoutDirection;\n    /** Checks whether the stepper contains the focused element. */\n    private _containsFocus;\n    /** Checks whether the passed-in index is a valid step index. */\n    private _isValidIndex;\n    static ngAcceptInputType_editable: BooleanInput;\n    static ngAcceptInputType_optional: BooleanInput;\n    static ngAcceptInputType_completed: BooleanInput;\n    static ngAcceptInputType_hasError: BooleanInput;\n    static ngAcceptInputType_linear: BooleanInput;\n    static ngAcceptInputType_selectedIndex: NumberInput;\n}\n/**\n * Simplified representation of an \"AbstractControl\" from @angular/forms.\n * Used to avoid having to bring in @angular/forms for a single optional interface.\n * @docs-private\n */\ninterface AbstractControlLike {\n    asyncValidator: ((control: any) => any) | null;\n    dirty: boolean;\n    disabled: boolean;\n    enabled: boolean;\n    errors: {\n        [key: string]: any;\n    } | null;\n    invalid: boolean;\n    parent: any;\n    pending: boolean;\n    pristine: boolean;\n    root: AbstractControlLike;\n    status: string;\n    readonly statusChanges: Observable<any>;\n    touched: boolean;\n    untouched: boolean;\n    updateOn: any;\n    valid: boolean;\n    validator: ((control: any) => any) | null;\n    value: any;\n    readonly valueChanges: Observable<any>;\n    clearAsyncValidators(): void;\n    clearValidators(): void;\n    disable(opts?: any): void;\n    enable(opts?: any): void;\n    get(path: (string | number)[] | string): AbstractControlLike | null;\n    getError(errorCode: string, path?: (string | number)[] | string): any;\n    hasError(errorCode: string, path?: (string | number)[] | string): boolean;\n    markAllAsTouched(): void;\n    markAsDirty(opts?: any): void;\n    markAsPending(opts?: any): void;\n    markAsPristine(opts?: any): void;\n    markAsTouched(opts?: any): void;\n    markAsUntouched(opts?: any): void;\n    patchValue(value: any, options?: Object): void;\n    reset(value?: any, options?: Object): void;\n    setAsyncValidators(newValidator: (control: any) => any | ((control: any) => any)[] | null): void;\n    setErrors(errors: {\n        [key: string]: any;\n    } | null, opts?: any): void;\n    setParent(parent: any): void;\n    setValidators(newValidator: (control: any) => any | ((control: any) => any)[] | null): void;\n    setValue(value: any, options?: Object): void;\n    updateValueAndValidity(opts?: any): void;\n    patchValue(value: any, options?: any): void;\n    reset(formState?: any, options?: any): void;\n    setValue(value: any, options?: any): void;\n}\nexport {};\n"]}