import { CdkVirtualScrollViewport, VirtualScrollStrategy } from '@angular/cdk/scrolling';
import { Observable } from 'rxjs';
import { DestroyService } from '@mosaic-design/infosec-components/services';
import { Range } from '@mosaic-design/infosec-components/types';
export declare class VerticalAutosizeVirtualScrollStrategy implements VirtualScrollStrategy {
    private buffer;
    private destroyed$;
    scrolledIndexChange: Observable<number>;
    get scrolledToEnd(): Observable<void>;
    private _scrolledToEnd;
    get renderedRangeChange(): Observable<Range>;
    private _renderedRangeChange;
    get orientation(): 'horizontal' | 'vertical' | undefined;
    private readonly totalSizeChangeTimeout;
    private viewport;
    private renderingState;
    private scrollItems;
    private firstRenderedIndex$;
    private totalSizeChange$;
    private lastDataLength;
    private lastRenderedRange;
    constructor(buffer: number, destroyed$: DestroyService);
    private static getViewportSize;
    private static renderNextItem;
    private static getViewportParameters;
    private static getRangeIndexes;
    updateBufferSize(buffer: number): void;
    attach(viewport: CdkVirtualScrollViewport): void;
    detach(): void;
    onContentRendered(): void;
    onContentScrolled(): void;
    onDataLengthChanged(): void;
    onRenderedOffsetChanged(): void;
    scrollToIndex(index: number, behavior: ScrollBehavior): void;
    private get totalElementsSize();
    private get averageElementSize();
    private get renderedElements();
    private get renderedItems();
    private initPrepareState;
    private renderIteration;
    private renderPrepareStateIteration;
    private renderStagingStateIteration;
    private switchToStagingState;
    private processDataLengthChange;
    private calculatePossibleItemsSize;
    private isChangedTotalSize;
    private actualizeElementSize;
    private checkEmptyViewportSpace;
    private updateTotalContentSize;
    private clearElementsResizeSubscriptions;
    private createRenderedElementsResizeSubscriptions;
    private getIndexByOffset;
    private getOffsetFromStartByIndex;
    private getParametersForScroll;
    private createSubscriptions;
}