| /** |
| * @license |
| * Copyright Google LLC All Rights Reserved. |
| * |
| * Use of this source code is governed by an MIT-style license that can be |
| * found in the LICENSE file at https://angular.io/license |
| */ |
| import { OnChanges } from '@angular/core'; |
| import { Observable } from 'rxjs'; |
| import { VirtualScrollStrategy } from './virtual-scroll-strategy'; |
| import { CdkVirtualScrollViewport } from './virtual-scroll-viewport'; |
| /** Virtual scrolling strategy for lists with items of known fixed size. */ |
| export declare class FixedSizeVirtualScrollStrategy implements VirtualScrollStrategy { |
| private _scrolledIndexChange; |
| /** @docs-private Implemented as part of VirtualScrollStrategy. */ |
| scrolledIndexChange: Observable<number>; |
| /** The attached viewport. */ |
| private _viewport; |
| /** The size of the items in the virtually scrolling list. */ |
| private _itemSize; |
| /** The minimum amount of buffer rendered beyond the viewport (in pixels). */ |
| private _minBufferPx; |
| /** The number of buffer items to render beyond the edge of the viewport (in pixels). */ |
| private _maxBufferPx; |
| /** |
| * @param itemSize The size of the items in the virtually scrolling list. |
| * @param minBufferPx The minimum amount of buffer (in pixels) before needing to render more |
| * @param maxBufferPx The amount of buffer (in pixels) to render when rendering more. |
| */ |
| constructor(itemSize: number, minBufferPx: number, maxBufferPx: number); |
| /** |
| * Attaches this scroll strategy to a viewport. |
| * @param viewport The viewport to attach this strategy to. |
| */ |
| attach(viewport: CdkVirtualScrollViewport): void; |
| /** Detaches this scroll strategy from the currently attached viewport. */ |
| detach(): void; |
| /** |
| * Update the item size and buffer size. |
| * @param itemSize The size of the items in the virtually scrolling list. |
| * @param minBufferPx The minimum amount of buffer (in pixels) before needing to render more |
| * @param maxBufferPx The amount of buffer (in pixels) to render when rendering more. |
| */ |
| updateItemAndBufferSize(itemSize: number, minBufferPx: number, maxBufferPx: number): void; |
| /** @docs-private Implemented as part of VirtualScrollStrategy. */ |
| onContentScrolled(): void; |
| /** @docs-private Implemented as part of VirtualScrollStrategy. */ |
| onDataLengthChanged(): void; |
| /** @docs-private Implemented as part of VirtualScrollStrategy. */ |
| onContentRendered(): void; |
| /** @docs-private Implemented as part of VirtualScrollStrategy. */ |
| onRenderedOffsetChanged(): void; |
| /** |
| * Scroll to the offset for the given index. |
| * @param index The index of the element to scroll to. |
| * @param behavior The ScrollBehavior to use when scrolling. |
| */ |
| scrollToIndex(index: number, behavior: ScrollBehavior): void; |
| /** Update the viewport's total content size. */ |
| private _updateTotalContentSize; |
| /** Update the viewport's rendered range. */ |
| private _updateRenderedRange; |
| } |
| /** |
| * Provider factory for `FixedSizeVirtualScrollStrategy` that simply extracts the already created |
| * `FixedSizeVirtualScrollStrategy` from the given directive. |
| * @param fixedSizeDir The instance of `CdkFixedSizeVirtualScroll` to extract the |
| * `FixedSizeVirtualScrollStrategy` from. |
| */ |
| export declare function _fixedSizeVirtualScrollStrategyFactory(fixedSizeDir: CdkFixedSizeVirtualScroll): FixedSizeVirtualScrollStrategy; |
| /** A virtual scroll strategy that supports fixed-size items. */ |
| export declare class CdkFixedSizeVirtualScroll implements OnChanges { |
| /** The size of the items in the list (in pixels). */ |
| itemSize: number; |
| _itemSize: number; |
| /** |
| * The minimum amount of buffer rendered beyond the viewport (in pixels). |
| * If the amount of buffer dips below this number, more items will be rendered. Defaults to 100px. |
| */ |
| minBufferPx: number; |
| _minBufferPx: number; |
| /** |
| * The number of pixels worth of buffer to render for when rendering new items. Defaults to 200px. |
| */ |
| maxBufferPx: number; |
| _maxBufferPx: number; |
| /** The scroll strategy used by this directive. */ |
| _scrollStrategy: FixedSizeVirtualScrollStrategy; |
| ngOnChanges(): void; |
| } |