import { FocusableOption } from '@angular/cdk/a11y';
import { ViewportRuler } from '@angular/cdk/overlay';
import { Platform } from '@angular/cdk/platform';
import { AfterContentChecked, AfterContentInit, ChangeDetectorRef, ElementRef, EventEmitter, NgZone, OnDestroy, QueryList, Renderer2 } from '@angular/core';
import { MixinElementRefBase } from '@ngx-simple/core/common-behaviors';
import { TabInkBarComponent } from './tab-ink-bar.component';
export declare type TabHeaderItem = FocusableOption & {
    elementRef: ElementRef;
};
export declare type ScrollDirection = 'after' | 'before';
declare const _TabHeaderMixinBase: import("../../../dist/libs/core/common-behaviors/constructor").Constructor<import("../../../dist/libs/core/common-behaviors/unsubscribe").CanUnsubscribe> & typeof MixinElementRefBase;
export declare class SimTabHeaderComponent extends _TabHeaderMixinBase implements AfterContentInit, AfterContentChecked, OnDestroy {
    private _viewportRuler;
    private _changeDetectorRef;
    private _ngZone;
    private _platform;
    get selectedIndex(): number;
    set selectedIndex(value: number);
    /** 选择该选项时发出的事件 */
    readonly selectFocusedIndex: EventEmitter<number>;
    /** 标签聚焦时发出的事件. */
    readonly indexFocused: EventEmitter<number>;
    _items: QueryList<TabHeaderItem>;
    _inkBar: TabInkBarComponent;
    _tabListContainer: ElementRef<HTMLDivElement>;
    _tabList: ElementRef<HTMLDivElement>;
    _nextPaginator: ElementRef<HTMLDivElement>;
    _previousPaginator: ElementRef<HTMLDivElement>;
    /** 是否可以将选项卡列表更多地滚动到选项卡标签列表的末尾 */
    _disableScrollAfter: boolean;
    /** 是否可以将选项卡列表更多地滚动到选项卡标签列表的开头 */
    _disableScrollBefore: boolean;
    /** 是否应该显示分页控件 */
    _showPaginationControls: boolean;
    private _selectedIndex;
    /** 用于管理标签之间的焦点 */
    private _keyManager;
    /** 将停止自动滚动的流 */
    private _stopScrolling;
    /** 标签向左平移的距离(以像素为单位) */
    private _scrollDistance;
    /** 滚动距离是否已更改，并且应在检查视图后应用 */
    private _scrollDistanceChanged;
    /** 检查视图后，标题是否应滚动到所选索引 */
    private _selectedIndexChanged;
    /** 缓存标题的文本内容 */
    private _currentTextContent;
    /** 标题上显示的标签页标签的数目。当这个改变时，标题应该重新计算滚动位置 */
    private _tabLabelCount;
    /** 跟踪哪个元素具有焦点； 用于键盘导航 */
    get focusIndex(): number;
    /** 设置焦点索引后，我们必须手动将焦点发送到正确的标签 */
    set focusIndex(value: number);
    get scrollDistance(): number;
    set scrollDistance(value: number);
    constructor(_elementRef: ElementRef, _viewportRuler: ViewportRuler, _changeDetectorRef: ChangeDetectorRef, _ngZone: NgZone, _platform: Platform, renderer: Renderer2);
    ngAfterContentInit(): void;
    ngAfterContentChecked(): void;
    ngOnDestroy(): void;
    /** 将焦点放在标签容器的HTML元素上，并在启用滚动时将其滚动到视图中 */
    _setTabFocus(tabIndex: number): void;
    _alignInkBarToSelectedTab(): void;
    _scrollToLabel(labelIndex: number): void;
    _isValidIndex(index: number): boolean;
    _itemSelected(event: KeyboardEvent): void;
    /** 更新视图是否应启用分页 */
    updatePagination(): void;
    _checkPaginationEnabled(): void;
    /** 在选项卡列表上执行CSS transformation，这将导致列表滚动。 */
    _updateTabScrollPosition(): void;
    /**
     * MutationObserver检测到内容已更改时的回调
     */
    _onContentChanges(): void;
    /** 停止当前正在运行的分页器间隔 */
    _stopInterval(): void;
    _handlePaginatorClick(direction: ScrollDirection): void;
    _handlePaginatorPress(direction: ScrollDirection, mouseEvent?: MouseEvent): void;
    _scrollHeader(direction: ScrollDirection): {
        maxScrollDistance: number;
        distance: number;
    };
    /** 处理标签页标题上的键盘事件 */
    _handleKeydown(event: KeyboardEvent): void;
    private _checkScrollingControls;
    private _getMaxScrollDistance;
    /** 将标题滚动到指定位置 */
    private _scrollTo;
}
export {};