You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1.7 KiB
38 lines
1.7 KiB
/**
|
|
* @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 { InjectionToken } from '@angular/core';
|
|
import { Observable } from 'rxjs';
|
|
import { CdkVirtualScrollViewport } from './virtual-scroll-viewport';
|
|
/** The injection token used to specify the virtual scrolling strategy. */
|
|
export declare const VIRTUAL_SCROLL_STRATEGY: InjectionToken<VirtualScrollStrategy>;
|
|
/** A strategy that dictates which items should be rendered in the viewport. */
|
|
export interface VirtualScrollStrategy {
|
|
/** Emits when the index of the first element visible in the viewport changes. */
|
|
scrolledIndexChange: Observable<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;
|
|
/** Called when the viewport is scrolled (debounced using requestAnimationFrame). */
|
|
onContentScrolled(): void;
|
|
/** Called when the length of the data changes. */
|
|
onDataLengthChanged(): void;
|
|
/** Called when the range of items rendered in the DOM has changed. */
|
|
onContentRendered(): void;
|
|
/** Called when the offset of the rendered items changed. */
|
|
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;
|
|
}
|