fix(material/datepicker): calendar reopening on spacebar selection

src/material/datepicker/calendar.spec.ts

@@ -221,6 +221,8 @@ describe('MatCalendar', () => {
 
             dispatchKeyboardEvent(tableBodyEl, 'keydown', ENTER);
             fixture.detectChanges();
+            dispatchKeyboardEvent(tableBodyEl, 'keyup', ENTER);
+            fixture.detectChanges();
 
             expect(calendarInstance.currentView).toBe('month');
             expect(calendarInstance.activeDate).toEqual(new Date(2017, FEB, 28));
@@ -235,6 +237,8 @@ describe('MatCalendar', () => {
 
             dispatchKeyboardEvent(tableBodyEl, 'keydown', SPACE);
             fixture.detectChanges();
+            dispatchKeyboardEvent(tableBodyEl, 'keyup', SPACE);
+            fixture.detectChanges();
 
             expect(calendarInstance.currentView).toBe('month');
             expect(calendarInstance.activeDate).toEqual(new Date(2017, FEB, 28));
@@ -258,6 +262,8 @@ describe('MatCalendar', () => {
 
             dispatchKeyboardEvent(tableBodyEl, 'keydown', ENTER);
             fixture.detectChanges();
+            dispatchKeyboardEvent(tableBodyEl, 'keyup', ENTER);
+            fixture.detectChanges();
 
             expect(calendarInstance.currentView).toBe('year');
             expect(calendarInstance.activeDate).toEqual(new Date(2018, JAN, 31));
@@ -272,6 +278,8 @@ describe('MatCalendar', () => {
 
             dispatchKeyboardEvent(tableBodyEl, 'keydown', SPACE);
             fixture.detectChanges();
+            dispatchKeyboardEvent(tableBodyEl, 'keyup', SPACE);
+            fixture.detectChanges();
 
             expect(calendarInstance.currentView).toBe('year');
             expect(calendarInstance.activeDate).toEqual(new Date(2018, JAN, 31));
@@ -582,6 +590,8 @@ describe('MatCalendar', () => {
         tableBodyEl = calendarElement.querySelector('.mat-calendar-body') as HTMLElement;
         dispatchKeyboardEvent(tableBodyEl, 'keydown', ENTER);
         fixture.detectChanges();
+        dispatchKeyboardEvent(tableBodyEl, 'keyup', ENTER);
+        fixture.detectChanges();
 
         expect(calendarInstance.currentView).toBe('month');
         expect(testComponent.selected).toBeUndefined();

src/material/datepicker/datepicker.spec.ts

@@ -324,6 +324,8 @@ describe('MatDatepicker', () => {
           flush();
           dispatchKeyboardEvent(calendarBodyEl, 'keydown', ENTER);
           fixture.detectChanges();
+          dispatchKeyboardEvent(calendarBodyEl, 'keyup', ENTER);
+          fixture.detectChanges();
           flush();
 
           expect(document.querySelector('.mat-datepicker-dialog')).toBeNull();

src/material/datepicker/month-view.html

@@ -25,6 +25,7 @@
          [activeCell]="_dateAdapter.getDate(activeDate) - 1"
          (selectedValueChange)="_dateSelected($event)"
          (previewChange)="_previewChanged($event)"
+         (keyup)="_handleCalendarBodyKeyup($event)"
          (keydown)="_handleCalendarBodyKeydown($event)">
   </tbody>
 </table>

src/material/datepicker/month-view.spec.ts

@@ -287,6 +287,8 @@ describe('MatMonthView', () => {
 
             dispatchKeyboardEvent(calendarBodyEl, 'keydown', ENTER);
             fixture.detectChanges();
+            dispatchKeyboardEvent(calendarBodyEl, 'keyup', ENTER);
+            fixture.detectChanges();
 
             expect(testComponent.selected).toEqual(new Date(2017, JAN, 4));
           });
@@ -299,6 +301,8 @@ describe('MatMonthView', () => {
 
             dispatchKeyboardEvent(calendarBodyEl, 'keydown', SPACE);
             fixture.detectChanges();
+            dispatchKeyboardEvent(calendarBodyEl, 'keyup', SPACE);
+            fixture.detectChanges();
 
             expect(testComponent.selected).toEqual(new Date(2017, JAN, 4));
           });

src/material/datepicker/month-view.ts

@@ -71,6 +71,9 @@ const DAYS_PER_WEEK = 7;
 export class MatMonthView<D> implements AfterContentInit, OnChanges, OnDestroy {
   private _rerenderSubscription = Subscription.EMPTY;
 
+  /** Flag used to filter out space/enter keyup events that originated outside of the view. */
+  private _selectionKeyPressed: boolean;
+
   /**
    * The date to display in this month view (everything other than the month and year is ignored).
    */
@@ -285,9 +288,14 @@ export class MatMonthView<D> implements AfterContentInit, OnChanges, OnDestroy {
         break;
       case ENTER:
       case SPACE:
-        if (!this.dateFilter || this.dateFilter(this._activeDate)) {
-          this._dateSelected({value: this._dateAdapter.getDate(this._activeDate), event});
+        this._selectionKeyPressed = true;
+
+        if (this._canSelect(this._activeDate)) {
           // Prevent unexpected default actions such as form submission.
+          // Note that we only prevent the default action here while the selection happens in
+          // `keyup` below. We can't do the selection here, because it can cause the calendar to
+          // reopen if focus is restored immediately. We also can't call `preventDefault` on `keyup`
+          // because it's too late (see #23305).
           event.preventDefault();
         }
         return;
@@ -315,6 +323,17 @@ export class MatMonthView<D> implements AfterContentInit, OnChanges, OnDestroy {
     event.preventDefault();
   }
 
+  /** Handles keyup events on the calendar body when calendar is in month view. */
+  _handleCalendarBodyKeyup(event: KeyboardEvent): void {
+    if (event.keyCode === SPACE || event.keyCode === ENTER) {
+      if (this._selectionKeyPressed && this._canSelect(this._activeDate)) {
+        this._dateSelected({value: this._dateAdapter.getDate(this._activeDate), event});
+      }
+
+      this._selectionKeyPressed = false;
+    }
+  }
+
   /** Initializes this month view. */
   _init() {
     this._setRanges(this.selected);
@@ -450,4 +469,9 @@ export class MatMonthView<D> implements AfterContentInit, OnChanges, OnDestroy {
     this._comparisonRangeStart = this._getCellCompareValue(this.comparisonStart);
     this._comparisonRangeEnd = this._getCellCompareValue(this.comparisonEnd);
   }
+
+  /** Gets whether a date can be selected in the month view. */
+  private _canSelect(date: D) {
+    return !this.dateFilter || this.dateFilter(date);
+  }
 }

src/material/datepicker/multi-year-view.html

@@ -11,6 +11,7 @@
          [cellAspectRatio]="4 / 7"
          [activeCell]="_getActiveCell()"
          (selectedValueChange)="_yearSelected($event)"
+         (keyup)="_handleCalendarBodyKeyup($event)"
          (keydown)="_handleCalendarBodyKeydown($event)">
   </tbody>
 </table>

src/material/datepicker/multi-year-view.ts

@@ -62,6 +62,9 @@ export const yearsPerRow = 4;
 export class MatMultiYearView<D> implements AfterContentInit, OnDestroy {
   private _rerenderSubscription = Subscription.EMPTY;
 
+  /** Flag used to filter out space/enter keyup events that originated outside of the view. */
+  private _selectionKeyPressed: boolean;
+
   /** The date to display in this multi-year view (everything other than the year is ignored). */
   @Input()
   get activeDate(): D { return this._activeDate; }
@@ -233,7 +236,11 @@ export class MatMultiYearView<D> implements AfterContentInit, OnDestroy {
         break;
       case ENTER:
       case SPACE:
-        this._yearSelected({value: this._dateAdapter.getYear(this._activeDate), event});
+        // Note that we only prevent the default action here while the selection happens in
+        // `keyup` below. We can't do the selection here, because it can cause the calendar to
+        // reopen if focus is restored immediately. We also can't call `preventDefault` on `keyup`
+        // because it's too late (see #23305).
+        this._selectionKeyPressed = true;
         break;
       default:
         // Don't prevent default or focus active cell on keys that we don't explicitly handle.
@@ -248,6 +255,17 @@ export class MatMultiYearView<D> implements AfterContentInit, OnDestroy {
     event.preventDefault();
   }
 
+  /** Handles keyup events on the calendar body when calendar is in multi-year view. */
+  _handleCalendarBodyKeyup(event: KeyboardEvent): void {
+    if (event.keyCode === SPACE || event.keyCode === ENTER) {
+      if (this._selectionKeyPressed) {
+        this._yearSelected({value: this._dateAdapter.getYear(this._activeDate), event});
+      }
+
+      this._selectionKeyPressed = false;
+    }
+  }
+
   _getActiveCell(): number {
     return getActiveOffset(this._dateAdapter, this.activeDate, this.minDate, this.maxDate);
   }

src/material/datepicker/year-view.html

@@ -13,6 +13,7 @@
          [cellAspectRatio]="4 / 7"
          [activeCell]="_dateAdapter.getMonth(activeDate)"
          (selectedValueChange)="_monthSelected($event)"
+         (keyup)="_handleCalendarBodyKeyup($event)"
          (keydown)="_handleCalendarBodyKeydown($event)">
   </tbody>
 </table>

src/material/datepicker/year-view.ts

@@ -59,6 +59,9 @@ import {DateRange} from './date-selection-model';
 export class MatYearView<D> implements AfterContentInit, OnDestroy {
   private _rerenderSubscription = Subscription.EMPTY;
 
+  /** Flag used to filter out space/enter keyup events that originated outside of the view. */
+  private _selectionKeyPressed: boolean;
+
   /** The date to display in this year view (everything other than the year is ignored). */
   @Input()
   get activeDate(): D { return this._activeDate; }
@@ -220,7 +223,11 @@ export class MatYearView<D> implements AfterContentInit, OnDestroy {
         break;
       case ENTER:
       case SPACE:
-        this._monthSelected({value: this._dateAdapter.getMonth(this._activeDate), event});
+        // Note that we only prevent the default action here while the selection happens in
+        // `keyup` below. We can't do the selection here, because it can cause the calendar to
+        // reopen if focus is restored immediately. We also can't call `preventDefault` on `keyup`
+        // because it's too late (see #23305).
+        this._selectionKeyPressed = true;
         break;
       default:
         // Don't prevent default or focus active cell on keys that we don't explicitly handle.
@@ -236,6 +243,17 @@ export class MatYearView<D> implements AfterContentInit, OnDestroy {
     event.preventDefault();
   }
 
+  /** Handles keyup events on the calendar body when calendar is in year view. */
+  _handleCalendarBodyKeyup(event: KeyboardEvent): void {
+    if (event.keyCode === SPACE || event.keyCode === ENTER) {
+      if (this._selectionKeyPressed) {
+        this._monthSelected({value: this._dateAdapter.getMonth(this._activeDate), event});
+      }
+
+      this._selectionKeyPressed = false;
+    }
+  }
+
   /** Initializes this year view. */
   _init() {
     this._setSelectedMonth(this.selected);

tools/public_api_guard/material/datepicker.md

@@ -785,6 +785,7 @@ export class MatMonthView<D> implements AfterContentInit, OnChanges, OnDestroy {
     _firstWeekOffset: number;
     _focusActiveCell(movePreview?: boolean): void;
     _handleCalendarBodyKeydown(event: KeyboardEvent): void;
+    _handleCalendarBodyKeyup(event: KeyboardEvent): void;
     _init(): void;
     _isRange: boolean;
     _matCalendarBody: MatCalendarBody;
@@ -834,6 +835,7 @@ export class MatMultiYearView<D> implements AfterContentInit, OnDestroy {
     // (undocumented)
     _getActiveCell(): number;
     _handleCalendarBodyKeydown(event: KeyboardEvent): void;
+    _handleCalendarBodyKeyup(event: KeyboardEvent): void;
     _init(): void;
     _matCalendarBody: MatCalendarBody;
     get maxDate(): D | null;
@@ -922,6 +924,7 @@ export class MatYearView<D> implements AfterContentInit, OnDestroy {
     dateFilter: (date: D) => boolean;
     _focusActiveCell(): void;
     _handleCalendarBodyKeydown(event: KeyboardEvent): void;
+    _handleCalendarBodyKeyup(event: KeyboardEvent): void;
     _init(): void;
     _matCalendarBody: MatCalendarBody;
     get maxDate(): D | null;