refactor(cdk/scrolling): switch directives to standalone (#26236)

Switches all of the scrolling directives to standalone so they can be used as host directives.

Fixes #26219.

(cherry picked from commit 49749fd)

Author: crisbeto

src/cdk/scrolling/fixed-size-virtual-scroll.ts

@@ -192,6 +192,7 @@ export function _fixedSizeVirtualScrollStrategyFactory(fixedSizeDir: CdkFixedSiz
 /** A virtual scroll strategy that supports fixed-size items. */
 @Directive({
   selector: 'cdk-virtual-scroll-viewport[itemSize]',
+  standalone: true,
   providers: [
     {
       provide: VIRTUAL_SCROLL_STRATEGY,

src/cdk/scrolling/scrollable.ts

@@ -43,6 +43,7 @@ export type ExtendedScrollToOptions = _XAxis & _YAxis & ScrollOptions;
  */
 @Directive({
   selector: '[cdk-scrollable], [cdkScrollable]',
+  standalone: true,
 })
 export class CdkScrollable implements OnInit, OnDestroy {
   protected readonly _destroyed = new Subject<void>();

src/cdk/scrolling/scrolling-module.ts

@@ -17,25 +17,26 @@ import {CdkVirtualScrollableWindow} from './virtual-scrollable-window';
 
 @NgModule({
   exports: [CdkScrollable],
-  declarations: [CdkScrollable],
+  imports: [CdkScrollable],
 })
 export class CdkScrollableModule {}
 
 /**
  * @docs-primary-export
  */
 @NgModule({
-  imports: [BidiModule, CdkScrollableModule],
-  exports: [
+  imports: [
     BidiModule,
     CdkScrollableModule,
+    CdkVirtualScrollViewport,
     CdkFixedSizeVirtualScroll,
     CdkVirtualForOf,
-    CdkVirtualScrollViewport,
     CdkVirtualScrollableWindow,
     CdkVirtualScrollableElement,
   ],
-  declarations: [
+  exports: [
+    BidiModule,
+    CdkScrollableModule,
     CdkFixedSizeVirtualScroll,
     CdkVirtualForOf,
     CdkVirtualScrollViewport,

src/cdk/scrolling/virtual-for-of.ts

@@ -82,6 +82,7 @@ function getOffset(orientation: 'horizontal' | 'vertical', direction: 'start' |
 @Directive({
   selector: '[cdkVirtualFor][cdkVirtualForOf]',
   providers: [{provide: _VIEW_REPEATER_STRATEGY, useClass: _RecycleViewRepeaterStrategy}],
+  standalone: true,
 })
 export class CdkVirtualForOf<T>
   implements CdkVirtualScrollRepeater<T>, CollectionViewer, DoCheck, OnDestroy

src/cdk/scrolling/virtual-scroll-viewport.ts

@@ -67,6 +67,7 @@ const SCROLL_SCHEDULER =
   },
   encapsulation: ViewEncapsulation.None,
   changeDetection: ChangeDetectionStrategy.OnPush,
+  standalone: true,
   providers: [
     {
       provide: CdkScrollable,

src/cdk/scrolling/virtual-scrollable-element.ts

@@ -17,6 +17,7 @@ import {CdkVirtualScrollable, VIRTUAL_SCROLLABLE} from './virtual-scrollable';
 @Directive({
   selector: '[cdkVirtualScrollingElement]',
   providers: [{provide: VIRTUAL_SCROLLABLE, useExisting: CdkVirtualScrollableElement}],
+  standalone: true,
   host: {
     'class': 'cdk-virtual-scrollable',
   },

src/cdk/scrolling/virtual-scrollable-window.ts

@@ -19,6 +19,7 @@ import {CdkVirtualScrollable, VIRTUAL_SCROLLABLE} from './virtual-scrollable';
 @Directive({
   selector: 'cdk-virtual-scroll-viewport[scrollWindow]',
   providers: [{provide: VIRTUAL_SCROLLABLE, useExisting: CdkVirtualScrollableWindow}],
+  standalone: true,
 })
 export class CdkVirtualScrollableWindow extends CdkVirtualScrollable {
   protected override _elementScrolled: Observable<Event> = new Observable(

tools/public_api_guard/cdk/scrolling.md

@@ -12,7 +12,7 @@ import { Directionality } from '@angular/cdk/bidi';
 import { DoCheck } from '@angular/core';
 import { ElementRef } from '@angular/core';
 import * as i0 from '@angular/core';
-import * as i7 from '@angular/cdk/bidi';
+import * as i2 from '@angular/cdk/bidi';
 import { InjectionToken } from '@angular/core';
 import { IterableDiffers } from '@angular/core';
 import { ListRange } from '@angular/cdk/collections';
@@ -54,7 +54,7 @@ export class CdkFixedSizeVirtualScroll implements OnChanges {
     ngOnChanges(): void;
     _scrollStrategy: FixedSizeVirtualScrollStrategy;
     // (undocumented)
-    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkFixedSizeVirtualScroll, "cdk-virtual-scroll-viewport[itemSize]", never, { "itemSize": "itemSize"; "minBufferPx": "minBufferPx"; "maxBufferPx": "maxBufferPx"; }, {}, never, never, false, never>;
+    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkFixedSizeVirtualScroll, "cdk-virtual-scroll-viewport[itemSize]", never, { "itemSize": "itemSize"; "minBufferPx": "minBufferPx"; "maxBufferPx": "maxBufferPx"; }, {}, never, never, true, never>;
     // (undocumented)
     static ɵfac: i0.ɵɵFactoryDeclaration<CdkFixedSizeVirtualScroll, never>;
 }
@@ -83,7 +83,7 @@ export class CdkScrollable implements OnInit, OnDestroy {
     protected scrollDispatcher: ScrollDispatcher;
     scrollTo(options: ExtendedScrollToOptions): void;
     // (undocumented)
-    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkScrollable, "[cdk-scrollable], [cdkScrollable]", never, {}, {}, never, never, false, never>;
+    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkScrollable, "[cdk-scrollable], [cdkScrollable]", never, {}, {}, never, never, true, never>;
     // (undocumented)
     static ɵfac: i0.ɵɵFactoryDeclaration<CdkScrollable, [null, null, null, { optional: true; }]>;
 }
@@ -95,7 +95,7 @@ export class CdkScrollableModule {
     // (undocumented)
     static ɵinj: i0.ɵɵInjectorDeclaration<CdkScrollableModule>;
     // (undocumented)
-    static ɵmod: i0.ɵɵNgModuleDeclaration<CdkScrollableModule, [typeof i1.CdkScrollable], never, [typeof i1.CdkScrollable]>;
+    static ɵmod: i0.ɵɵNgModuleDeclaration<CdkScrollableModule, never, [typeof i1.CdkScrollable], [typeof i1.CdkScrollable]>;
 }
 
 // @public
@@ -123,7 +123,7 @@ export class CdkVirtualForOf<T> implements CdkVirtualScrollRepeater<T>, Collecti
     ngOnDestroy(): void;
     readonly viewChange: Subject<ListRange>;
     // (undocumented)
-    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkVirtualForOf<any>, "[cdkVirtualFor][cdkVirtualForOf]", never, { "cdkVirtualForOf": "cdkVirtualForOf"; "cdkVirtualForTrackBy": "cdkVirtualForTrackBy"; "cdkVirtualForTemplate": "cdkVirtualForTemplate"; "cdkVirtualForTemplateCacheSize": "cdkVirtualForTemplateCacheSize"; }, {}, never, never, false, never>;
+    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkVirtualForOf<any>, "[cdkVirtualFor][cdkVirtualForOf]", never, { "cdkVirtualForOf": "cdkVirtualForOf"; "cdkVirtualForTrackBy": "cdkVirtualForTrackBy"; "cdkVirtualForTemplate": "cdkVirtualForTemplate"; "cdkVirtualForTemplateCacheSize": "cdkVirtualForTemplateCacheSize"; }, {}, never, never, true, never>;
     // (undocumented)
     static ɵfac: i0.ɵɵFactoryDeclaration<CdkVirtualForOf<any>, [null, null, null, null, { skipSelf: true; }, null]>;
 }
@@ -157,7 +157,7 @@ export class CdkVirtualScrollableElement extends CdkVirtualScrollable {
     // (undocumented)
     measureBoundingClientRectWithScrollOffset(from: 'left' | 'top' | 'right' | 'bottom'): number;
     // (undocumented)
-    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkVirtualScrollableElement, "[cdkVirtualScrollingElement]", never, {}, {}, never, never, false, never>;
+    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkVirtualScrollableElement, "[cdkVirtualScrollingElement]", never, {}, {}, never, never, true, never>;
     // (undocumented)
     static ɵfac: i0.ɵɵFactoryDeclaration<CdkVirtualScrollableElement, [null, null, null, { optional: true; }]>;
 }
@@ -170,7 +170,7 @@ export class CdkVirtualScrollableWindow extends CdkVirtualScrollable {
     // (undocumented)
     measureBoundingClientRectWithScrollOffset(from: 'left' | 'top' | 'right' | 'bottom'): number;
     // (undocumented)
-    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkVirtualScrollableWindow, "cdk-virtual-scroll-viewport[scrollWindow]", never, {}, {}, never, never, false, never>;
+    static ɵdir: i0.ɵɵDirectiveDeclaration<CdkVirtualScrollableWindow, "cdk-virtual-scroll-viewport[scrollWindow]", never, {}, {}, never, never, true, never>;
     // (undocumented)
     static ɵfac: i0.ɵɵFactoryDeclaration<CdkVirtualScrollableWindow, [null, null, { optional: true; }]>;
 }
@@ -222,7 +222,7 @@ export class CdkVirtualScrollViewport extends CdkVirtualScrollable implements On
     _totalContentHeight: string;
     _totalContentWidth: string;
     // (undocumented)
-    static ɵcmp: i0.ɵɵComponentDeclaration<CdkVirtualScrollViewport, "cdk-virtual-scroll-viewport", never, { "orientation": "orientation"; "appendOnly": "appendOnly"; }, { "scrolledIndexChange": "scrolledIndexChange"; }, never, ["*"], false, never>;
+    static ɵcmp: i0.ɵɵComponentDeclaration<CdkVirtualScrollViewport, "cdk-virtual-scroll-viewport", never, { "orientation": "orientation"; "appendOnly": "appendOnly"; }, { "scrolledIndexChange": "scrolledIndexChange"; }, never, ["*"], true, never>;
     // (undocumented)
     static ɵfac: i0.ɵɵFactoryDeclaration<CdkVirtualScrollViewport, [null, null, null, { optional: true; }, { optional: true; }, null, null, { optional: true; }]>;
 }
@@ -294,7 +294,7 @@ export class ScrollingModule {
     // (undocumented)
     static ɵinj: i0.ɵɵInjectorDeclaration<ScrollingModule>;
     // (undocumented)
-    static ɵmod: i0.ɵɵNgModuleDeclaration<ScrollingModule, [typeof i2.CdkFixedSizeVirtualScroll, typeof i3.CdkVirtualForOf, typeof i4.CdkVirtualScrollViewport, typeof i5.CdkVirtualScrollableWindow, typeof i6.CdkVirtualScrollableElement], [typeof i7.BidiModule, typeof CdkScrollableModule], [typeof i7.BidiModule, typeof CdkScrollableModule, typeof i2.CdkFixedSizeVirtualScroll, typeof i3.CdkVirtualForOf, typeof i4.CdkVirtualScrollViewport, typeof i5.CdkVirtualScrollableWindow, typeof i6.CdkVirtualScrollableElement]>;
+    static ɵmod: i0.ɵɵNgModuleDeclaration<ScrollingModule, never, [typeof i2.BidiModule, typeof CdkScrollableModule, typeof i3.CdkVirtualScrollViewport, typeof i4.CdkFixedSizeVirtualScroll, typeof i5.CdkVirtualForOf, typeof i6.CdkVirtualScrollableWindow, typeof i7.CdkVirtualScrollableElement], [typeof i2.BidiModule, typeof CdkScrollableModule, typeof i4.CdkFixedSizeVirtualScroll, typeof i5.CdkVirtualForOf, typeof i3.CdkVirtualScrollViewport, typeof i6.CdkVirtualScrollableWindow, typeof i7.CdkVirtualScrollableElement]>;
 }
 
 // @public (undocumented)