@angular/material/tabs/index.d.ts

Angular Material

import { _AbstractConstructor } from '@angular/material/core';
import { AfterContentChecked } from '@angular/core';
import { AfterContentInit } from '@angular/core';
import { AfterViewInit } from '@angular/core';
import { AnimationEvent as AnimationEvent_2 } from '@angular/animations';
import { AnimationTriggerMetadata } from '@angular/animations';
import { BehaviorSubject } from 'rxjs';
import { BooleanInput } from '@angular/cdk/coercion';
import { CanColor } from '@angular/material/core';
import { CanDisable } from '@angular/material/core';
import { CanDisableRipple } from '@angular/material/core';
import { CdkPortal } from '@angular/cdk/portal';
import { CdkPortalOutlet } from '@angular/cdk/portal';
import { ChangeDetectorRef } from '@angular/core';
import { ComponentFactoryResolver } from '@angular/core';
import { _Constructor } from '@angular/material/core';
import { Direction } from '@angular/cdk/bidi';
import { Directionality } from '@angular/cdk/bidi';
import { ElementRef } from '@angular/core';
import { EventEmitter } from '@angular/core';
import { FocusableOption } from '@angular/cdk/a11y';
import { FocusMonitor } from '@angular/cdk/a11y';
import { FocusOrigin } from '@angular/cdk/a11y';
import { HasTabIndex } from '@angular/material/core';
import * as i0 from '@angular/core';
import * as i10 from '@angular/material/core';
import * as i11 from '@angular/cdk/portal';
import * as i12 from '@angular/cdk/observers';
import * as i13 from '@angular/cdk/a11y';
import * as i9 from '@angular/common';
import { InjectionToken } from '@angular/core';
import { NgZone } from '@angular/core';
import { NumberInput } from '@angular/cdk/coercion';
import { OnChanges } from '@angular/core';
import { OnDestroy } from '@angular/core';
import { OnInit } from '@angular/core';
import { Platform } from '@angular/cdk/platform';
import { QueryList } from '@angular/core';
import { RippleConfig } from '@angular/material/core';
import { RippleGlobalOptions } from '@angular/material/core';
import { RippleTarget } from '@angular/material/core';
import { SimpleChanges } from '@angular/core';
import { Subject } from 'rxjs';
import { TemplatePortal } from '@angular/cdk/portal';
import { TemplateRef } from '@angular/core';
import { ThemePalette } from '@angular/material/core';
import { ViewContainerRef } from '@angular/core';
import { ViewportRuler } from '@angular/cdk/scrolling';

declare namespace i1 {
    export {
        MAT_TAB_CONTENT,
        MatTabContent
    }
}

declare namespace i2 {
    export {
        MAT_TAB_LABEL,
        MAT_TAB,
        MatTabLabel
    }
}

declare namespace i3 {
    export {
        MAT_TAB_GROUP,
        _MatTabBase,
        MatTab
    }
}

declare namespace i4 {
    export {
        MatTabGroupBaseHeader,
        MatTabHeaderPosition,
        _MatTabGroupBase,
        MatTabGroup,
        MatTabChangeEvent
    }
}

declare namespace i5 {
    export {
        _MatTabNavBase,
        _MatTabLinkBase,
        MatTabNav,
        MatTabLink,
        MatTabNavPanel
    }
}

declare namespace i6 {
    export {
        MatTabBodyPortal,
        MatTabBodyPositionState,
        _MatTabBodyBase,
        MatTabBody,
        MatTabBodyOriginState
    }
}

declare namespace i7 {
    export {
        _MatTabLabelWrapperBase,
        MatTabLabelWrapper
    }
}

declare namespace i8 {
    export {
        _MatTabHeaderBase,
        MatTabHeader
    }
}

/** Injection token for the MatInkBar's Positioner. */
export declare const _MAT_INK_BAR_POSITIONER: InjectionToken<_MatInkBarPositioner>;

/**
 * The default positioner function for the MatInkBar.
 * @docs-private
 */
export declare function _MAT_INK_BAR_POSITIONER_FACTORY(): _MatInkBarPositioner;

/**
 * Used to provide a tab label to a tab without causing a circular dependency.
 * @docs-private
 */
export declare const MAT_TAB: InjectionToken<any>;

/**
 * Injection token that can be used to reference instances of `MatTabContent`. It serves as
 * alternative token to the actual `MatTabContent` class which could cause unnecessary
 * retention of the class and its directive metadata.
 */
export declare const MAT_TAB_CONTENT: InjectionToken<MatTabContent>;

/**
 * Used to provide a tab group to a tab without causing a circular dependency.
 * @docs-private
 */
export declare const MAT_TAB_GROUP: InjectionToken<any>;

/**
 * Injection token that can be used to reference instances of `MatTabLabel`. It serves as
 * alternative token to the actual `MatTabLabel` class which could cause unnecessary
 * retention of the class and its directive metadata.
 */
export declare const MAT_TAB_LABEL: InjectionToken<MatTabLabel>;

/** Injection token that can be used to provide the default options the tabs module. */
export declare const MAT_TABS_CONFIG: InjectionToken<MatTabsConfig>;

/**
 * Abstraction around the MDC tab indicator that acts as the tab header's ink bar.
 * @docs-private
 */
export declare class MatInkBar {
    private _items;
    /** Item to which the ink bar is aligned currently. */
    private _currentItem;
    constructor(_items: QueryList<MatInkBarItem>);
    /** Hides the ink bar. */
    hide(): void;
    /** Aligns the ink bar to a DOM node. */
    alignToElement(element: HTMLElement): void;
}

/**
 * Item inside a tab header relative to which the ink bar can be aligned.
 * @docs-private
 */
declare interface MatInkBarItem extends OnInit, OnDestroy {
    elementRef: ElementRef<HTMLElement>;
    activateInkBar(previousIndicatorClientRect?: ClientRect): void;
    deactivateInkBar(): void;
    fitInkBarToContent: boolean;
}

/**
 * Interface for a a MatInkBar positioner method, defining the positioning and width of the ink
 * bar in a set of tabs.
 */
export declare interface _MatInkBarPositioner {
    (element: HTMLElement): {
        left: string;
        width: string;
    };
}

/**
 * Base class for a tab header that supported pagination.
 * @docs-private
 */
export declare abstract class MatPaginatedTabHeader implements AfterContentChecked, AfterContentInit, AfterViewInit, OnDestroy {
    protected _elementRef: ElementRef<HTMLElement>;
    protected _changeDetectorRef: ChangeDetectorRef;
    private _viewportRuler;
    private _dir;
    private _ngZone;
    private _platform;
    _animationMode?: string | undefined;
    abstract _items: QueryList<MatPaginatedTabHeaderItem>;
    abstract _inkBar: {
        hide: () => void;
        alignToElement: (element: HTMLElement) => void;
    };
    abstract _tabListContainer: ElementRef<HTMLElement>;
    abstract _tabList: ElementRef<HTMLElement>;
    abstract _tabListInner: ElementRef<HTMLElement>;
    abstract _nextPaginator: ElementRef<HTMLElement>;
    abstract _previousPaginator: ElementRef<HTMLElement>;
    /** The distance in pixels that the tab labels should be translated to the left. */
    private _scrollDistance;
    /** Whether the header should scroll to the selected index after the view has been checked. */
    private _selectedIndexChanged;
    /** Emits when the component is destroyed. */
    protected readonly _destroyed: Subject<void>;
    /** Whether the controls for pagination should be displayed */
    _showPaginationControls: boolean;
    /** Whether the tab list can be scrolled more towards the end of the tab label list. */
    _disableScrollAfter: boolean;
    /** Whether the tab list can be scrolled more towards the beginning of the tab label list. */
    _disableScrollBefore: boolean;
    /**
     * The number of tab labels that are displayed on the header. When this changes, the header
     * should re-evaluate the scroll position.
     */
    private _tabLabelCount;
    /** Whether the scroll distance has changed and should be applied after the view is checked. */
    private _scrollDistanceChanged;
    /** Used to manage focus between the tabs. */
    private _keyManager;
    /** Cached text content of the header. */
    private _currentTextContent;
    /** Stream that will stop the automated scrolling. */
    private _stopScrolling;
    /**
     * Whether pagination should be disabled. This can be used to avoid unnecessary
     * layout recalculations if it's known that pagination won't be required.
     */
    get disablePagination(): boolean;
    set disablePagination(value: BooleanInput);
    private _disablePagination;
    /** The index of the active tab. */
    get selectedIndex(): number;
    set selectedIndex(value: NumberInput);
    private _selectedIndex;
    /** Event emitted when the option is selected. */
    readonly selectFocusedIndex: EventEmitter<number>;
    /** Event emitted when a label is focused. */
    readonly indexFocused: EventEmitter<number>;
    constructor(_elementRef: ElementRef<HTMLElement>, _changeDetectorRef: ChangeDetectorRef, _viewportRuler: ViewportRuler, _dir: Directionality, _ngZone: NgZone, _platform: Platform, _animationMode?: string | undefined);
    /** Called when the user has selected an item via the keyboard. */
    protected abstract _itemSelected(event: KeyboardEvent): void;
    ngAfterViewInit(): void;
    ngAfterContentInit(): void;
    /** Sends any changes that could affect the layout of the items. */
    private _itemsResized;
    ngAfterContentChecked(): void;
    ngOnDestroy(): void;
    /** Handles keyboard events on the header. */
    _handleKeydown(event: KeyboardEvent): void;
    /**
     * Callback for when the MutationObserver detects that the content has changed.
     */
    _onContentChanges(): void;
    /**
     * Updates the view whether pagination should be enabled or not.
     *
     * WARNING: Calling this method can be very costly in terms of performance. It should be called
     * as infrequently as possible from outside of the Tabs component as it causes a reflow of the
     * page.
     */
    updatePagination(): void;
    /** Tracks which element has focus; used for keyboard navigation */
    get focusIndex(): number;
    /** When the focus index is set, we must manually send focus to the correct label */
    set focusIndex(value: number);
    /**
     * Determines if an index is valid.  If the tabs are not ready yet, we assume that the user is
     * providing a valid index and return true.
     */
    _isValidIndex(index: number): boolean;
    /**
     * Sets focus on the HTML element for the label wrapper and scrolls it into the view if
     * scrolling is enabled.
     */
    _setTabFocus(tabIndex: number): void;
    /** The layout direction of the containing app. */
    _getLayoutDirection(): Direction;
    /** Performs the CSS transformation on the tab list that will cause the list to scroll. */
    _updateTabScrollPosition(): void;
    /** Sets the distance in pixels that the tab header should be transformed in the X-axis. */
    get scrollDistance(): number;
    set scrollDistance(value: number);
    /**
     * Moves the tab list in the 'before' or 'after' direction (towards the beginning of the list or
     * the end of the list, respectively). The distance to scroll is computed to be a third of the
     * length of the tab list view window.
     *
     * This is an expensive call that forces a layout reflow to compute box and scroll metrics and
     * should be called sparingly.
     */
    _scrollHeader(direction: ScrollDirection): {
        maxScrollDistance: number;
        distance: number;
    };
    /** Handles click events on the pagination arrows. */
    _handlePaginatorClick(direction: ScrollDirection): void;
    /**
     * Moves the tab list such that the desired tab label (marked by index) is moved into view.
     *
     * This is an expensive call that forces a layout reflow to compute box and scroll metrics and
     * should be called sparingly.
     */
    _scrollToLabel(labelIndex: number): void;
    /**
     * Evaluate whether the pagination controls should be displayed. If the scroll width of the
     * tab list is wider than the size of the header container, then the pagination controls should
     * be shown.
     *
     * This is an expensive call that forces a layout reflow to compute box and scroll metrics and
     * should be called sparingly.
     */
    _checkPaginationEnabled(): void;
    /**
     * Evaluate whether the before and after controls should be enabled or disabled.
     * If the header is at the beginning of the list (scroll distance is equal to 0) then disable the
     * before button. If the header is at the end of the list (scroll distance is equal to the
     * maximum distance we can scroll), then disable the after button.
     *
     * This is an expensive call that forces a layout reflow to compute box and scroll metrics and
     * should be called sparingly.
     */
    _checkScrollingControls(): void;
    /**
     * Determines what is the maximum length in pixels that can be set for the scroll distance. This
     * is equal to the difference in width between the tab list container and tab header container.
     *
     * This is an expensive call that forces a layout reflow to compute box and scroll metrics and
     * should be called sparingly.
     */
    _getMaxScrollDistance(): number;
    /** Tells the ink-bar to align itself to the current label wrapper */
    _alignInkBarToSelectedTab(): void;
    /** Stops the currently-running paginator interval.  */
    _stopInterval(): void;
    /**
     * Handles the user pressing down on one of the paginators.
     * Starts scrolling the header after a certain amount of time.
     * @param direction In which direction the paginator should be scrolled.
     */
    _handlePaginatorPress(direction: ScrollDirection, mouseEvent?: MouseEvent): void;
    /**
     * Scrolls the header to a given position.
     * @param position Position to which to scroll.
     * @returns Information on the current scroll distance and the maximum.
     */
    private _scrollTo;
    static ɵfac: i0.ɵɵFactoryDeclaration<MatPaginatedTabHeader, [null, null, null, { optional: true; }, null, null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<MatPaginatedTabHeader, never, never, { "disablePagination": "disablePagination"; }, {}, never, never, false, never>;
}

/** Item inside a paginated tab header. */
declare type MatPaginatedTabHeaderItem = FocusableOption & {
    elementRef: ElementRef;
};

export declare class MatTab extends _MatTabBase {
    /**
     * Template provided in the tab content that will be used if present, used to enable lazy-loading
     */
    _explicitContent: TemplateRef<any>;
    /** Content for the tab label given by `<ng-template mat-tab-label>`. */
    get templateLabel(): MatTabLabel;
    set templateLabel(value: MatTabLabel);
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTab, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<MatTab, "mat-tab", ["matTab"], { "disabled": "disabled"; }, {}, ["_explicitContent", "templateLabel"], ["*"], false, never>;
}

/** @docs-private */
export declare class _MatTabBase extends _MatTabMixinBase implements CanDisable, OnInit, OnChanges, OnDestroy {
    private _viewContainerRef;
    _closestTabGroup: any;
    /** Content for the tab label given by `<ng-template mat-tab-label>`. */
    protected _templateLabel: MatTabLabel;
    /**
     * Template provided in the tab content that will be used if present, used to enable lazy-loading
     */
    _explicitContent: TemplateRef<any>;
    /** Template inside the MatTab view that contains an `<ng-content>`. */
    _implicitContent: TemplateRef<any>;
    /** Plain text label for the tab, used when there is no template label. */
    textLabel: string;
    /** Aria label for the tab. */
    ariaLabel: string;
    /**
     * Reference to the element that the tab is labelled by.
     * Will be cleared if `aria-label` is set at the same time.
     */
    ariaLabelledby: string;
    /**
     * Classes to be passed to the tab label inside the mat-tab-header container.
     * Supports string and string array values, same as `ngClass`.
     */
    labelClass: string | string[];
    /**
     * Classes to be passed to the tab mat-tab-body container.
     * Supports string and string array values, same as `ngClass`.
     */
    bodyClass: string | string[];
    /** Portal that will be the hosted content of the tab */
    private _contentPortal;
    /** @docs-private */
    get content(): TemplatePortal | null;
    /** Emits whenever the internal state of the tab changes. */
    readonly _stateChanges: Subject<void>;
    /**
     * The relatively indexed position where 0 represents the center, negative is left, and positive
     * represents the right.
     */
    position: number | null;
    /**
     * The initial relatively index origin of the tab if it was created and selected after there
     * was already a selected tab. Provides context of what position the tab should originate from.
     */
    origin: number | null;
    /**
     * Whether the tab is currently active.
     */
    isActive: boolean;
    constructor(_viewContainerRef: ViewContainerRef, _closestTabGroup: any);
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    ngOnInit(): void;
    /**
     * This has been extracted to a util because of TS 4 and VE.
     * View Engine doesn't support property rename inheritance.
     * TS 4.0 doesn't allow properties to override accessors or vice-versa.
     * @docs-private
     */
    protected _setTemplateLabelInput(value: MatTabLabel | undefined): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<_MatTabBase, [null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<_MatTabBase, never, never, { "textLabel": "label"; "ariaLabel": "aria-label"; "ariaLabelledby": "aria-labelledby"; "labelClass": "labelClass"; "bodyClass": "bodyClass"; }, {}, never, never, false, never>;
}

/**
 * Wrapper for the contents of a tab.
 * @docs-private
 */
export declare class MatTabBody extends _MatTabBodyBase {
    _portalHost: CdkPortalOutlet;
    constructor(elementRef: ElementRef<HTMLElement>, dir: Directionality, changeDetectorRef: ChangeDetectorRef);
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabBody, [null, { optional: true; }, null]>;
    static ɵcmp: i0.ɵɵComponentDeclaration<MatTabBody, "mat-tab-body", never, {}, {}, never, never, false, never>;
}

/**
 * Base class with all of the `MatTabBody` functionality.
 * @docs-private
 */
export declare abstract class _MatTabBodyBase implements OnInit, OnDestroy {
    private _elementRef;
    private _dir;
    /** Current position of the tab-body in the tab-group. Zero means that the tab is visible. */
    private _positionIndex;
    /** Subscription to the directionality change observable. */
    private _dirChangeSubscription;
    /** Tab body position state. Used by the animation trigger for the current state. */
    _position: MatTabBodyPositionState;
    /** Emits when an animation on the tab is complete. */
    readonly _translateTabComplete: Subject<AnimationEvent_2>;
    /** Event emitted when the tab begins to animate towards the center as the active tab. */
    readonly _onCentering: EventEmitter<number>;
    /** Event emitted before the centering of the tab begins. */
    readonly _beforeCentering: EventEmitter<boolean>;
    /** Event emitted before the centering of the tab begins. */
    readonly _afterLeavingCenter: EventEmitter<void>;
    /** Event emitted when the tab completes its animation towards the center. */
    readonly _onCentered: EventEmitter<void>;
    /** The portal host inside of this container into which the tab body content will be loaded. */
    abstract _portalHost: CdkPortalOutlet;
    /** The tab body content to display. */
    _content: TemplatePortal;
    /** Position that will be used when the tab is immediately becoming visible after creation. */
    origin: number | null;
    /** Duration for the tab's animation. */
    animationDuration: string;
    /** Whether the tab's content should be kept in the DOM while it's off-screen. */
    preserveContent: boolean;
    /** The shifted index position of the tab body, where zero represents the active center tab. */
    set position(position: number);
    constructor(_elementRef: ElementRef<HTMLElement>, _dir: Directionality, changeDetectorRef: ChangeDetectorRef);
    /**
     * After initialized, check if the content is centered and has an origin. If so, set the
     * special position states that transition the tab from the left or right before centering.
     */
    ngOnInit(): void;
    ngOnDestroy(): void;
    _onTranslateTabStarted(event: AnimationEvent_2): void;
    /** The text direction of the containing app. */
    _getLayoutDirection(): Direction;
    /** Whether the provided position state is considered center, regardless of origin. */
    _isCenterPosition(position: MatTabBodyPositionState | string): boolean;
    /** Computes the position state that will be used for the tab-body animation trigger. */
    private _computePositionAnimationState;
    /**
     * Computes the position state based on the specified origin position. This is used if the
     * tab is becoming visible immediately after creation.
     */
    private _computePositionFromOrigin;
    static ɵfac: i0.ɵɵFactoryDeclaration<_MatTabBodyBase, [null, { optional: true; }, null]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<_MatTabBodyBase, never, never, { "_content": "content"; "origin": "origin"; "animationDuration": "animationDuration"; "preserveContent": "preserveContent"; "position": "position"; }, { "_onCentering": "_onCentering"; "_beforeCentering": "_beforeCentering"; "_afterLeavingCenter": "_afterLeavingCenter"; "_onCentered": "_onCentered"; }, never, never, false, never>;
}

/**
 * The origin state is an internally used state that is set on a new tab body indicating if it
 * began to the left or right of the prior selected index. For example, if the selected index was
 * set to 1, and a new tab is created and selected at index 2, then the tab body would have an
 * origin of right because its index was greater than the prior selected index.
 */
export declare type MatTabBodyOriginState = 'left' | 'right';

/**
 * The portal host directive for the contents of the tab.
 * @docs-private
 */
export declare class MatTabBodyPortal extends CdkPortalOutlet implements OnInit, OnDestroy {
    private _host;
    /** Subscription to events for when the tab body begins centering. */
    private _centeringSub;
    /** Subscription to events for when the tab body finishes leaving from center position. */
    private _leavingSub;
    constructor(componentFactoryResolver: ComponentFactoryResolver, viewContainerRef: ViewContainerRef, _host: MatTabBody, _document: any);
    /** Set initial visibility or set up subscription for changing visibility. */
    ngOnInit(): void;
    /** Clean up centering subscription. */
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabBodyPortal, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<MatTabBodyPortal, "[matTabBodyHost]", never, {}, {}, never, never, false, never>;
}

/**
 * These position states are used internally as animation states for the tab body. Setting the
 * position state to left, right, or center will transition the tab body from its current
 * position to its respective state. If there is not current position (void, in the case of a new
 * tab body), then there will be no transition animation to its state.
 *
 * In the case of a new tab body that should immediately be centered with an animating transition,
 * then left-origin-center or right-origin-center can be used, which will use left or right as its
 * pseudo-prior state.
 */
export declare type MatTabBodyPositionState = 'left' | 'center' | 'right' | 'left-origin-center' | 'right-origin-center';

/** A simple change event emitted on focus or selection changes. */
export declare class MatTabChangeEvent {
    /** Index of the currently-selected tab. */
    index: number;
    /** Reference to the currently-selected tab. */
    tab: MatTab;
}

/** Decorates the `ng-template` tags and reads out the template from it. */
export declare class MatTabContent {
    template: TemplateRef<any>;
    constructor(/** Content for the tab. */ template: TemplateRef<any>);
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabContent, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<MatTabContent, "[matTabContent]", never, {}, {}, never, never, false, never>;
}

/**
 * Material design tab-group component. Supports basic tab pairs (label + content) and includes
 * animated ink-bar, keyboard navigation, and screen reader.
 * See: https://material.io/design/components/tabs.html
 */
export declare class MatTabGroup extends _MatTabGroupBase {
    _allTabs: QueryList<MatTab>;
    _tabBodyWrapper: ElementRef;
    _tabHeader: MatTabHeader;
    /** Whether the ink bar should fit its width to the size of the tab label content. */
    get fitInkBarToContent(): boolean;
    set fitInkBarToContent(v: BooleanInput);
    private _fitInkBarToContent;
    /** Whether tabs should be stretched to fill the header. */
    get stretchTabs(): boolean;
    set stretchTabs(v: BooleanInput);
    private _stretchTabs;
    constructor(elementRef: ElementRef, changeDetectorRef: ChangeDetectorRef, defaultConfig?: MatTabsConfig, animationMode?: string);
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabGroup, [null, null, { optional: true; }, { optional: true; }]>;
    static ɵcmp: i0.ɵɵComponentDeclaration<MatTabGroup, "mat-tab-group", ["matTabGroup"], { "color": "color"; "disableRipple": "disableRipple"; "fitInkBarToContent": "fitInkBarToContent"; "stretchTabs": "mat-stretch-tabs"; }, {}, ["_allTabs"], never, false, never>;
}

/**
 * Base class with all of the `MatTabGroupBase` functionality.
 * @docs-private
 */
export declare abstract class _MatTabGroupBase extends _MatTabGroupMixinBase implements AfterContentInit, AfterContentChecked, OnDestroy, CanColor, CanDisableRipple {
    protected _changeDetectorRef: ChangeDetectorRef;
    _animationMode?: string | undefined;
    /**
     * All tabs inside the tab group. This includes tabs that belong to groups that are nested
     * inside the current one. We filter out only the tabs that belong to this group in `_tabs`.
     */
    abstract _allTabs: QueryList<MatTab>;
    abstract _tabBodyWrapper: ElementRef;
    abstract _tabHeader: MatTabGroupBaseHeader;
    /** All of the tabs that belong to the group. */
    _tabs: QueryList<MatTab>;
    /** The tab index that should be selected after the content has been checked. */
    private _indexToSelect;
    /** Index of the tab that was focused last. */
    private _lastFocusedTabIndex;
    /** Snapshot of the height of the tab body wrapper before another tab is activated. */
    private _tabBodyWrapperHeight;
    /** Subscription to tabs being added/removed. */
    private _tabsSubscription;
    /** Subscription to changes in the tab labels. */
    private _tabLabelSubscription;
    /** Whether the tab group should grow to the size of the active tab. */
    get dynamicHeight(): boolean;
    set dynamicHeight(value: BooleanInput);
    private _dynamicHeight;
    /** The index of the active tab. */
    get selectedIndex(): number | null;
    set selectedIndex(value: NumberInput);
    private _selectedIndex;
    /** Position of the tab header. */
    headerPosition: MatTabHeaderPosition;
    /** Duration for the tab animation. Will be normalized to milliseconds if no units are set. */
    get animationDuration(): string;
    set animationDuration(value: NumberInput);
    private _animationDuration;
    /**
     * `tabindex` to be set on the inner element that wraps the tab content. Can be used for improved
     * accessibility when the tab does not have focusable elements or if it has scrollable content.
     * The `tabindex` will be removed automatically for inactive tabs.
     * Read more at https://www.w3.org/TR/wai-aria-practices/examples/tabs/tabs-2/tabs.html
     */
    get contentTabIndex(): number | null;
    set contentTabIndex(value: NumberInput);
    private _contentTabIndex;
    /**
     * Whether pagination should be disabled. This can be used to avoid unnecessary
     * layout recalculations if it's known that pagination won't be required.
     */
    get disablePagination(): boolean;
    set disablePagination(value: BooleanInput);
    private _disablePagination;
    /**
     * By default tabs remove their content from the DOM while it's off-screen.
     * Setting this to `true` will keep it in the DOM which will prevent elements
     * like iframes and videos from reloading next time it comes back into the view.
     */
    get preserveContent(): boolean;
    set preserveContent(value: BooleanInput);
    private _preserveContent;
    /** Background color of the tab group. */
    get backgroundColor(): ThemePalette;
    set backgroundColor(value: ThemePalette);
    private _backgroundColor;
    /** Output to enable support for two-way binding on `[(selectedIndex)]` */
    readonly selectedIndexChange: EventEmitter<number>;
    /** Event emitted when focus has changed within a tab group. */
    readonly focusChange: EventEmitter<MatTabChangeEvent>;
    /** Event emitted when the body animation has completed */
    readonly animationDone: EventEmitter<void>;
    /** Event emitted when the tab selection has changed. */
    readonly selectedTabChange: EventEmitter<MatTabChangeEvent>;
    private _groupId;
    constructor(elementRef: ElementRef, _changeDetectorRef: ChangeDetectorRef, defaultConfig?: MatTabsConfig, _animationMode?: string | undefined);
    /**
     * After the content is checked, this component knows what tabs have been defined
     * and what the selected index should be. This is where we can know exactly what position
     * each tab should be in according to the new selected index, and additionally we know how
     * a new selected tab should transition in (from the left or right).
     */
    ngAfterContentChecked(): void;
    ngAfterContentInit(): void;
    /** Listens to changes in all of the tabs. */
    private _subscribeToAllTabChanges;
    ngOnDestroy(): void;
    /** Re-aligns the ink bar to the selected tab element. */
    realignInkBar(): void;
    /**
     * Recalculates the tab group's pagination dimensions.
     *
     * WARNING: Calling this method can be very costly in terms of performance. It should be called
     * as infrequently as possible from outside of the Tabs component as it causes a reflow of the
     * page.
     */
    updatePagination(): void;
    /**
     * Sets focus to a particular tab.
     * @param index Index of the tab to be focused.
     */
    focusTab(index: number): void;
    _focusChanged(index: number): void;
    private _createChangeEvent;
    /**
     * Subscribes to changes in the tab labels. This is needed, because the @Input for the label is
     * on the MatTab component, whereas the data binding is inside the MatTabGroup. In order for the
     * binding to be updated, we need to subscribe to changes in it and trigger change detection
     * manually.
     */
    private _subscribeToTabLabels;
    /** Clamps the given index to the bounds of 0 and the tabs length. */
    private _clampTabIndex;
    /** Returns a unique id for each tab label element */
    _getTabLabelId(i: number): string;
    /** Returns a unique id for each tab content element */
    _getTabContentId(i: number): string;
    /**
     * Sets the height of the body wrapper to the height of the activating tab if dynamic
     * height property is true.
     */
    _setTabBodyWrapperHeight(tabHeight: number): void;
    /** Removes the height of the tab body wrapper. */
    _removeTabBodyWrapperHeight(): void;
    /** Handle click events, setting new selected index if appropriate. */
    _handleClick(tab: MatTab, tabHeader: MatTabGroupBaseHeader, index: number): void;
    /** Retrieves the tabindex for the tab. */
    _getTabIndex(index: number): number;
    /** Callback for when the focused state of a tab has changed. */
    _tabFocusChanged(focusOrigin: FocusOrigin, index: number): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<_MatTabGroupBase, [null, null, { optional: true; }, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<_MatTabGroupBase, never, never, { "dynamicHeight": "dynamicHeight"; "selectedIndex": "selectedIndex"; "headerPosition": "headerPosition"; "animationDuration": "animationDuration"; "contentTabIndex": "contentTabIndex"; "disablePagination": "disablePagination"; "preserveContent": "preserveContent"; "backgroundColor": "backgroundColor"; }, { "selectedIndexChange": "selectedIndexChange"; "focusChange": "focusChange"; "animationDone": "animationDone"; "selectedTabChange": "selectedTabChange"; }, never, never, false, never>;
}

/** @docs-private */
export declare interface MatTabGroupBaseHeader {
    _alignInkBarToSelectedTab(): void;
    updatePagination(): void;
    focusIndex: number;
}

/** @docs-private */
declare const _MatTabGroupMixinBase: _Constructor<CanColor> & _AbstractConstructor<CanColor> & _Constructor<CanDisableRipple> & _AbstractConstructor<CanDisableRipple> & {
    new (_elementRef: ElementRef): {
        _elementRef: ElementRef;
    };
};

/**
 * The header of the tab group which displays a list of all the tabs in the tab group. Includes
 * an ink bar that follows the currently selected tab. When the tabs list's width exceeds the
 * width of the header container, then arrows will be displayed to allow the user to scroll
 * left and right across the header.
 * @docs-private
 */
export declare class MatTabHeader extends _MatTabHeaderBase implements AfterContentInit {
    _items: QueryList<MatTabLabelWrapper>;
    _tabListContainer: ElementRef;
    _tabList: ElementRef;
    _tabListInner: ElementRef;
    _nextPaginator: ElementRef<HTMLElement>;
    _previousPaginator: ElementRef<HTMLElement>;
    _inkBar: MatInkBar;
    constructor(elementRef: ElementRef, changeDetectorRef: ChangeDetectorRef, viewportRuler: ViewportRuler, dir: Directionality, ngZone: NgZone, platform: Platform, animationMode?: string);
    ngAfterContentInit(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabHeader, [null, null, null, { optional: true; }, null, null, { optional: true; }]>;
    static ɵcmp: i0.ɵɵComponentDeclaration<MatTabHeader, "mat-tab-header", never, { "selectedIndex": "selectedIndex"; }, { "selectFocusedIndex": "selectFocusedIndex"; "indexFocused": "indexFocused"; }, ["_items"], ["*"], false, never>;
}

/**
 * Base class with all of the `MatTabHeader` functionality.
 * @docs-private
 */
export declare abstract class _MatTabHeaderBase extends MatPaginatedTabHeader implements AfterContentChecked, AfterContentInit, AfterViewInit, OnDestroy {
    /** Whether the ripple effect is disabled or not. */
    get disableRipple(): boolean;
    set disableRipple(value: BooleanInput);
    private _disableRipple;
    constructor(elementRef: ElementRef, changeDetectorRef: ChangeDetectorRef, viewportRuler: ViewportRuler, dir: Directionality, ngZone: NgZone, platform: Platform, animationMode?: string);
    protected _itemSelected(event: KeyboardEvent): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<_MatTabHeaderBase, [null, null, null, { optional: true; }, null, null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<_MatTabHeaderBase, never, never, { "disableRipple": "disableRipple"; }, {}, never, never, false, never>;
}

/** Possible positions for the tab header. */
export declare type MatTabHeaderPosition = 'above' | 'below';

/** Used to flag tab labels for use with the portal directive */
export declare class MatTabLabel extends CdkPortal {
    _closestTab: any;
    constructor(templateRef: TemplateRef<any>, viewContainerRef: ViewContainerRef, _closestTab: any);
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabLabel, [null, null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<MatTabLabel, "[mat-tab-label], [matTabLabel]", never, {}, {}, never, never, false, never>;
}

/**
 * Used in the `mat-tab-group` view to display tab labels.
 * @docs-private
 */
export declare class MatTabLabelWrapper extends _MatTabLabelWrapperBaseWithInkBarItem implements MatInkBarItem {
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabLabelWrapper, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<MatTabLabelWrapper, "[matTabLabelWrapper]", never, { "disabled": "disabled"; "fitInkBarToContent": "fitInkBarToContent"; }, {}, never, never, false, never>;
}

/**
 * Used in the `mat-tab-group` view to display tab labels.
 * @docs-private
 */
export declare class _MatTabLabelWrapperBase extends _MatTabLabelWrapperMixinBase implements CanDisable {
    elementRef: ElementRef;
    constructor(elementRef: ElementRef);
    /** Sets focus on the wrapper element */
    focus(): void;
    getOffsetLeft(): number;
    getOffsetWidth(): number;
    static ɵfac: i0.ɵɵFactoryDeclaration<_MatTabLabelWrapperBase, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<_MatTabLabelWrapperBase, never, never, {}, {}, never, never, false, never>;
}

declare const _MatTabLabelWrapperBaseWithInkBarItem: typeof _MatTabLabelWrapperBase & (new (...args: any[]) => MatInkBarItem);

/** @docs-private */
declare const _MatTabLabelWrapperMixinBase: _Constructor<CanDisable> & _AbstractConstructor<CanDisable> & {
    new (): {};
};

/**
 * Link inside of a `mat-tab-nav-bar`.
 */
export declare class MatTabLink extends _MatTabLinkBaseWithInkBarItem implements MatInkBarItem, OnDestroy {
    private readonly _destroyed;
    constructor(tabNavBar: MatTabNav, elementRef: ElementRef, globalRippleOptions: RippleGlobalOptions | null, tabIndex: string, focusMonitor: FocusMonitor, animationMode?: string);
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabLink, [null, null, { optional: true; }, { attribute: "tabindex"; }, null, { optional: true; }]>;
    static ɵcmp: i0.ɵɵComponentDeclaration<MatTabLink, "[mat-tab-link], [matTabLink]", ["matTabLink"], { "disabled": "disabled"; "disableRipple": "disableRipple"; "tabIndex": "tabIndex"; "active": "active"; "id": "id"; }, {}, never, ["*"], false, never>;
}

/** Base class with all of the `MatTabLink` functionality. */
export declare class _MatTabLinkBase extends _MatTabLinkMixinBase implements AfterViewInit, OnDestroy, CanDisable, CanDisableRipple, HasTabIndex, RippleTarget, FocusableOption {
    private _tabNavBar;
    /** @docs-private */ elementRef: ElementRef;
    private _focusMonitor;
    /** Whether the tab link is active or not. */
    protected _isActive: boolean;
    /** Whether the link is active. */
    get active(): boolean;
    set active(value: BooleanInput);
    /**
     * Ripple configuration for ripples that are launched on pointer down. The ripple config
     * is set to the global ripple options since we don't have any configurable options for
     * the tab link ripples.
     * @docs-private
     */
    rippleConfig: RippleConfig & RippleGlobalOptions;
    /**
     * Whether ripples are disabled on interaction.
     * @docs-private
     */
    get rippleDisabled(): boolean;
    /** Unique id for the tab. */
    id: string;
    constructor(_tabNavBar: _MatTabNavBase, 
    /** @docs-private */ elementRef: ElementRef, globalRippleOptions: RippleGlobalOptions | null, tabIndex: string, _focusMonitor: FocusMonitor, animationMode?: string);
    /** Focuses the tab link. */
    focus(): void;
    ngAfterViewInit(): void;
    ngOnDestroy(): void;
    _handleFocus(): void;
    _handleKeydown(event: KeyboardEvent): void;
    _getAriaControls(): string | null;
    _getAriaSelected(): string | null;
    _getAriaCurrent(): string | null;
    _getRole(): string | null;
    _getTabIndex(): number;
    static ɵfac: i0.ɵɵFactoryDeclaration<_MatTabLinkBase, [null, null, { optional: true; }, { attribute: "tabindex"; }, null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<_MatTabLinkBase, never, never, { "active": "active"; "id": "id"; }, {}, never, never, false, never>;
}

declare const _MatTabLinkBaseWithInkBarItem: typeof _MatTabLinkBase & (new (...args: any[]) => MatInkBarItem);

declare const _MatTabLinkMixinBase: _Constructor<HasTabIndex> & _AbstractConstructor<HasTabIndex> & _Constructor<CanDisableRipple> & _AbstractConstructor<CanDisableRipple> & _Constructor<CanDisable> & _AbstractConstructor<CanDisable> & {
    new (): {};
};

/** @docs-private */
declare const _MatTabMixinBase: _Constructor<CanDisable> & _AbstractConstructor<CanDisable> & {
    new (): {};
};

/**
 * Navigation component matching the styles of the tab group header.
 * Provides anchored navigation with animated ink bar.
 */
export declare class MatTabNav extends _MatTabNavBase implements AfterContentInit, AfterViewInit {
    /** Whether the ink bar should fit its width to the size of the tab label content. */
    get fitInkBarToContent(): boolean;
    set fitInkBarToContent(v: BooleanInput);
    _fitInkBarToContent: BehaviorSubject<boolean>;
    /** Whether tabs should be stretched to fill the header. */
    get stretchTabs(): boolean;
    set stretchTabs(v: BooleanInput);
    private _stretchTabs;
    _items: QueryList<MatTabLink>;
    _tabListContainer: ElementRef;
    _tabList: ElementRef;
    _tabListInner: ElementRef;
    _nextPaginator: ElementRef<HTMLElement>;
    _previousPaginator: ElementRef<HTMLElement>;
    _inkBar: MatInkBar;
    constructor(elementRef: ElementRef, dir: Directionality, ngZone: NgZone, changeDetectorRef: ChangeDetectorRef, viewportRuler: ViewportRuler, platform: Platform, animationMode?: string, defaultConfig?: MatTabsConfig);
    ngAfterContentInit(): void;
    ngAfterViewInit(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabNav, [null, { optional: true; }, null, null, null, null, { optional: true; }, { optional: true; }]>;
    static ɵcmp: i0.ɵɵComponentDeclaration<MatTabNav, "[mat-tab-nav-bar]", ["matTabNavBar", "matTabNav"], { "color": "color"; "fitInkBarToContent": "fitInkBarToContent"; "stretchTabs": "mat-stretch-tabs"; }, {}, ["_items"], ["*"], false, never>;
}

/**
 * Base class with all of the `MatTabNav` functionality.
 * @docs-private
 */
export declare abstract class _MatTabNavBase extends MatPaginatedTabHeader implements AfterContentChecked, AfterContentInit, OnDestroy {
    /** Query list of all tab links of the tab navigation. */
    abstract _items: QueryList<MatPaginatedTabHeaderItem & {
        active: boolean;
        id: string;
    }>;
    /** Background color of the tab nav. */
    get backgroundColor(): ThemePalette;
    set backgroundColor(value: ThemePalette);
    private _backgroundColor;
    /** Whether the ripple effect is disabled or not. */
    get disableRipple(): boolean;
    set disableRipple(value: BooleanInput);
    private _disableRipple;
    /** Theme color of the nav bar. */
    color: ThemePalette;
    /**
     * Associated tab panel controlled by the nav bar. If not provided, then the nav bar
     * follows the ARIA link / navigation landmark pattern. If provided, it follows the
     * ARIA tabs design pattern.
     */
    tabPanel?: MatTabNavPanel;
    constructor(elementRef: ElementRef, dir: Directionality, ngZone: NgZone, changeDetectorRef: ChangeDetectorRef, viewportRuler: ViewportRuler, platform: Platform, animationMode?: string);
    protected _itemSelected(): void;
    ngAfterContentInit(): void;
    /** Notifies the component that the active link has been changed. */
    updateActiveLink(): void;
    _getRole(): string | null;
    static ɵfac: i0.ɵɵFactoryDeclaration<_MatTabNavBase, [null, { optional: true; }, null, null, null, null, { optional: true; }]>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<_MatTabNavBase, never, never, { "backgroundColor": "backgroundColor"; "disableRipple": "disableRipple"; "color": "color"; "tabPanel": "tabPanel"; }, {}, never, never, false, never>;
}

/**
 * Tab panel component associated with MatTabNav.
 */
export declare class MatTabNavPanel {
    /** Unique id for the tab panel. */
    id: string;
    /** Id of the active tab in the nav bar. */
    _activeTabId?: string;
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabNavPanel, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<MatTabNavPanel, "mat-tab-nav-panel", ["matTabNavPanel"], { "id": "id"; }, {}, never, ["*"], false, never>;
}

/**
 * Animations used by the Material tabs.
 * @docs-private
 */
export declare const matTabsAnimations: {
    readonly translateTab: AnimationTriggerMetadata;
};

/** Object that can be used to configure the default options for the tabs module. */
export declare interface MatTabsConfig {
    /** Duration for the tab animation. Must be a valid CSS value (e.g. 600ms). */
    animationDuration?: string;
    /**
     * Whether pagination should be disabled. This can be used to avoid unnecessary
     * layout recalculations if it's known that pagination won't be required.
     */
    disablePagination?: boolean;
    /**
     * Whether the ink bar should fit its width to the size of the tab label content.
     * This only applies to the MDC-based tabs.
     */
    fitInkBarToContent?: boolean;
    /** Whether the tab group should grow to the size of the active tab. */
    dynamicHeight?: boolean;
    /** `tabindex` to be set on the inner element that wraps the tab content. */
    contentTabIndex?: number;
    /**
     * By default tabs remove their content from the DOM while it's off-screen.
     * Setting this to `true` will keep it in the DOM which will prevent elements
     * like iframes and videos from reloading next time it comes back into the view.
     */
    preserveContent?: boolean;
}

export declare class MatTabsModule {
    static ɵfac: i0.ɵɵFactoryDeclaration<MatTabsModule, never>;
    static ɵmod: i0.ɵɵNgModuleDeclaration<MatTabsModule, [typeof i1.MatTabContent, typeof i2.MatTabLabel, typeof i3.MatTab, typeof i4.MatTabGroup, typeof i5.MatTabNav, typeof i5.MatTabNavPanel, typeof i5.MatTabLink, typeof i6.MatTabBody, typeof i6.MatTabBodyPortal, typeof i7.MatTabLabelWrapper, typeof i8.MatTabHeader], [typeof i9.CommonModule, typeof i10.MatCommonModule, typeof i11.PortalModule, typeof i10.MatRippleModule, typeof i12.ObserversModule, typeof i13.A11yModule], [typeof i10.MatCommonModule, typeof i1.MatTabContent, typeof i2.MatTabLabel, typeof i3.MatTab, typeof i4.MatTabGroup, typeof i5.MatTabNav, typeof i5.MatTabNavPanel, typeof i5.MatTabLink]>;
    static ɵinj: i0.ɵɵInjectorDeclaration<MatTabsModule>;
}

/**
 * The directions that scrolling can go in when the header's tabs exceed the header width. 'After'
 * will scroll the header towards the end of the tabs list and 'before' will scroll towards the
 * beginning of the list.
 */
export declare type ScrollDirection = 'after' | 'before';

export { }