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/**
* @license
* Copyright Google Inc. 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
*/
/* tslint:disable:array-type member-access variable-name typedef
only-arrow-functions directive-class-suffix component-class-suffix
component-selector no-unused-expression*/
import {Injectable} from '@angular/core';
import {ViewportRuler} from '../position/viewport-ruler';
import {BlockScrollStrategy} from './block-scroll-strategy';
import {CloseScrollStrategy} from './close-scroll-strategy';
import {NoopScrollStrategy} from './noop-scroll-strategy';
import {RepositionScrollStrategy, RepositionScrollStrategyConfig} from './reposition-scroll-strategy';
import {ScrollDispatcher} from './scroll-dispatcher';
// import {ScrollStrategy} from './scroll-strategy';
/**
* Options for how an overlay will handle scrolling.
*
* Users can provide a custom value for `ScrollStrategyOptions` to replace the
* default behaviors. This class primarily acts as a factory for ScrollStrategy
* instances.
*/
@Injectable()
export class ScrollStrategyOptions {
constructor(
private _scrollDispatcher: ScrollDispatcher,
private _viewportRuler: ViewportRuler) {}
/** Do nothing on scroll. */
noop = () => new NoopScrollStrategy();
/** Close the overlay as soon as the user scrolls. */
close = () => new CloseScrollStrategy(this._scrollDispatcher);
/** Block scrolling. */
block = () => new BlockScrollStrategy(this._viewportRuler);
/**
* Update the overlay's position on scroll.
* @param config Configuration to be used inside the scroll strategy.
* Allows debouncing the reposition calls.
*/
reposition = (config?: RepositionScrollStrategyConfig) =>
new RepositionScrollStrategy(this._scrollDispatcher, config)
}
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