Revert "fix(autocomplete): update template when changing autocomplete in trigger"

src/lib/autocomplete/autocomplete-trigger.ts

@@ -15,6 +15,7 @@ import {
   PositionStrategy,
   ScrollStrategy,
 } from '@angular/cdk/overlay';
+import {TemplatePortal} from '@angular/cdk/portal';
 import {DOCUMENT} from '@angular/common';
 import {filter, take, switchMap, delay, tap, map} from 'rxjs/operators';
 import {
@@ -29,6 +30,7 @@ import {
   NgZone,
   OnDestroy,
   Optional,
+  ViewContainerRef,
 } from '@angular/core';
 import {ViewportRuler} from '@angular/cdk/scrolling';
 import {ControlValueAccessor, NG_VALUE_ACCESSOR} from '@angular/forms';
@@ -115,9 +117,9 @@ export function getMatAutocompleteMissingPanelError(): Error {
 })
 export class MatAutocompleteTrigger implements ControlValueAccessor, OnDestroy {
   private _overlayRef: OverlayRef | null;
+  private _portal: TemplatePortal;
   private _componentDestroyed = false;
   private _autocompleteDisabled = false;
-  private _autocomplete: MatAutocomplete;
   private _scrollStrategy: () => ScrollStrategy;
 
   /** Old value of the native input. Used to work around issues with the `input` event on IE. */
@@ -130,7 +132,7 @@ export class MatAutocompleteTrigger implements ControlValueAccessor, OnDestroy {
   private _manuallyFloatingLabel = false;
 
   /** The subscription for closing actions (some are bound to document). */
-  private _closingActionsSubscription = Subscription.EMPTY;
+  private _closingActionsSubscription: Subscription;
 
   /** Subscription to viewport size changes. */
   private _viewportSubscription = Subscription.EMPTY;
@@ -164,12 +166,7 @@ export class MatAutocompleteTrigger implements ControlValueAccessor, OnDestroy {
   _onTouched = () => {};
 
   /** The autocomplete panel to be attached to this trigger. */
-  @Input('matAutocomplete')
-  get autocomplete(): MatAutocomplete { return this._autocomplete; }
-  set autocomplete(value: MatAutocomplete) {
-    this._autocomplete = value;
-    this._detachOverlay();
-  }
+  @Input('matAutocomplete') autocomplete: MatAutocomplete;
 
   /**
    * Reference relative to which to position the autocomplete panel.
@@ -193,8 +190,8 @@ export class MatAutocompleteTrigger implements ControlValueAccessor, OnDestroy {
     this._autocompleteDisabled = coerceBooleanProperty(value);
   }
 
-  constructor(private _element: ElementRef<HTMLInputElement>,
-              private _overlay: Overlay,
+  constructor(private _element: ElementRef<HTMLInputElement>, private _overlay: Overlay,
+              private _viewContainerRef: ViewContainerRef,
               private _zone: NgZone,
               private _changeDetectorRef: ChangeDetectorRef,
               @Inject(MAT_AUTOCOMPLETE_SCROLL_STRATEGY) scrollStrategy: any,
@@ -249,9 +246,12 @@ export class MatAutocompleteTrigger implements ControlValueAccessor, OnDestroy {
       this.autocomplete.closed.emit();
     }
 
-    this.autocomplete._isOpen = false;
-    this._detachOverlay();
+    this.autocomplete._isOpen = this._overlayAttached = false;
 
+    if (this._overlayRef && this._overlayRef.hasAttached()) {
+      this._overlayRef.detach();
+      this._closingActionsSubscription.unsubscribe();
+    }
 
     // Note that in some cases this can end up being called after the component is destroyed.
     // Add a check to ensure that we don't try to run change detection on a destroyed view.
@@ -570,6 +570,7 @@ export class MatAutocompleteTrigger implements ControlValueAccessor, OnDestroy {
     }
 
     if (!this._overlayRef) {
+      this._portal = new TemplatePortal(this.autocomplete.template, this._viewContainerRef);
       this._overlayRef = this._overlay.create(this._getOverlayConfig());
 
       // Use the `keydownEvents` in order to take advantage of
@@ -596,7 +597,7 @@ export class MatAutocompleteTrigger implements ControlValueAccessor, OnDestroy {
     }
 
     if (this._overlayRef && !this._overlayRef.hasAttached()) {
-      this._overlayRef.attach(this.autocomplete._portal);
+      this._overlayRef.attach(this._portal);
       this._closingActionsSubscription = this._subscribeToClosingActions();
     }
 
@@ -612,14 +613,6 @@ export class MatAutocompleteTrigger implements ControlValueAccessor, OnDestroy {
     }
   }
 
-  private _detachOverlay() {
-    this._overlayAttached = false;
-    this._closingActionsSubscription.unsubscribe();
-    if (this._overlayRef) {
-      this._overlayRef.detach();
-    }
-  }
-
   private _getOverlayConfig(): OverlayConfig {
     return new OverlayConfig({
       positionStrategy: this._getOverlayPosition(),

src/lib/autocomplete/autocomplete.spec.ts

@@ -2233,35 +2233,6 @@ describe('MatAutocomplete', () => {
     expect(formControl.value).toBe('Cal', 'Expected new value to be propagated to model');
   }));
 
-  it('should work when dynamically changing the autocomplete', () => {
-    const fixture = createComponent(DynamicallyChangingAutocomplete);
-    fixture.detectChanges();
-    const input = fixture.debugElement.query(By.css('input')).nativeElement;
-
-    dispatchFakeEvent(input, 'focusin');
-    fixture.detectChanges();
-
-    expect(overlayContainerElement.textContent).toContain('First',
-      `Expected panel to display the option of the first autocomplete.`);
-    expect(overlayContainerElement.textContent).not.toContain('Second',
-      `Expected panel to not display the option of the second autocomplete.`);
-
-    dispatchFakeEvent(document, 'click');
-    fixture.detectChanges();
-
-    fixture.componentInstance.trigger.autocomplete = fixture.componentInstance.autoTow;
-    fixture.detectChanges();
-
-    dispatchFakeEvent(input, 'focusin');
-    fixture.detectChanges();
-
-    expect(overlayContainerElement.textContent).not.toContain('First',
-      `Expected panel to not display the option of the first autocomplete.`);
-    expect(overlayContainerElement.textContent).toContain('Second',
-      `Expected panel to display the option of the second autocomplete.`);
-
-  });
-
 });
 
 @Component({
@@ -2648,21 +2619,3 @@ class AutocompleteWithNativeAutocompleteAttribute {
 })
 class InputWithoutAutocompleteAndDisabled {
 }
-
-@Component({
-  template: `
-    <input type="number" matInput [matAutocomplete]="autoOne">
-    <mat-autocomplete #autoOne>
-      <mat-option [value]="0">First</mat-option>
-    </mat-autocomplete>
-
-    <mat-autocomplete #autoTow>
-      <mat-option [value]="1">Second</mat-option>
-    </mat-autocomplete>
-  `,
-})
-class DynamicallyChangingAutocomplete {
-  @ViewChild('autoOne') autoOne: MatAutocomplete;
-  @ViewChild('autoTow') autoTow: MatAutocomplete;
-  @ViewChild(MatAutocompleteTrigger) trigger: MatAutocompleteTrigger;
-}

src/lib/autocomplete/autocomplete.ts

@@ -24,8 +24,6 @@ import {
   TemplateRef,
   ViewChild,
   ViewEncapsulation,
-  AfterViewInit,
-  ViewContainerRef,
 } from '@angular/core';
 import {
   CanDisableRipple,
@@ -35,7 +33,6 @@ import {
   MatOption,
   mixinDisableRipple,
 } from '@angular/material/core';
-import {TemplatePortal} from '@angular/cdk/portal';
 
 
 /**
@@ -95,17 +92,14 @@ export function MAT_AUTOCOMPLETE_DEFAULT_OPTIONS_FACTORY(): MatAutocompleteDefau
   ]
 })
 export class MatAutocomplete extends _MatAutocompleteMixinBase implements AfterContentInit,
-  AfterViewInit, CanDisableRipple {
+  CanDisableRipple {
 
   /** Manages active item in option list based on key events. */
   _keyManager: ActiveDescendantKeyManager<MatOption>;
 
   /** Whether the autocomplete panel should be visible, depending on option length. */
   showPanel: boolean = false;
 
-  /** @docs-private */
-  _portal: TemplatePortal;
-
   /** Whether the autocomplete panel is open. */
   get isOpen(): boolean { return this._isOpen && this.showPanel; }
   _isOpen: boolean = false;
@@ -171,17 +165,12 @@ export class MatAutocomplete extends _MatAutocompleteMixinBase implements AfterC
   constructor(
     private _changeDetectorRef: ChangeDetectorRef,
     private _elementRef: ElementRef<HTMLElement>,
-    private _viewContainerRef: ViewContainerRef,
     @Inject(MAT_AUTOCOMPLETE_DEFAULT_OPTIONS) defaults: MatAutocompleteDefaultOptions) {
     super();
 
     this._autoActiveFirstOption = !!defaults.autoActiveFirstOption;
   }
 
-  ngAfterViewInit() {
-    this._portal = new TemplatePortal(this.template, this._viewContainerRef);
-  }
-
   ngAfterContentInit() {
     this._keyManager = new ActiveDescendantKeyManager<MatOption>(this.options).withWrap();
     // Set the initial visibility state.