license import { ViewContainerRef , InjectionToken } from '@angular/core' ; import { AriaLivePoliteness } from '@angular/cdk/a11y' ; import { Direction } from '@angular/cdk/bidi' ; /** Injection token that can be used to access the data that was passed in to a snack bar. */ export const MAT_SNACK_BAR_DATA = new InjectionToken < any > ( 'MatSnackBarData' ) ; /** Possible values for horizontalPosition on MatSnackBarConfig. */ export type MatSnackBarHorizontalPosition = 'start' | 'center' | 'end' | 'left' | 'right' ; /** Possible values for verticalPosition on MatSnackBarConfig. */ export type MatSnackBarVerticalPosition = 'top' | 'bottom' ; /**
 * Configuration used when opening a snack-bar.
 */ export class MatSnackBarConfig < D = any > { /** The politeness level for the MatAriaLiveAnnouncer announcement. */ politeness ? : AriaLivePoliteness = 'assertive' ; /**
     * Message to be announced by the LiveAnnouncer. When opening a snackbar without a custom
     * component or template, the announcement message will default to the specified message.
     */ announcementMessage ? : string = '' ; /** The view container to place the overlay for the snack bar into. */ viewContainerRef ? : ViewContainerRef ; /** The length of time in milliseconds to wait before automatically dismissing the snack bar. */ duration ? : number = 0 ; /** Extra CSS classes to be added to the snack bar container. */ panelClass ? : string | string [ ] ; /** Text layout direction for the snack bar. */ direction ? : Direction ; /** Data being injected into the child component. */ data ? : D | null = null ; /** The horizontal position to place the snack bar. */ horizontalPosition ? : MatSnackBarHorizontalPosition = 'center' ; /** The vertical position to place the snack bar. */ verticalPosition ? : MatSnackBarVerticalPosition = 'bottom' ; }