[ADF-2990] Datatable - access header row via keyboard (#5206)

* header row as adf-datatable-row

* remove tabindex if header is hidden

* adjust logic if no row data is passed

* skip row focus if disabled

* set active row index on header interaction

* take in account header row

* fix header row and cells focus

* tests

* fix reference

* fix tests

lib/core/datatable/components/datatable/datatable-row.component.spec.ts

@@ -55,6 +55,14 @@ describe('DataTableRowComponent', () => {
             .not.toBe(true);
     });
 
+    it('should not have select class when row data is null', () => {
+        row.isSelected = false;
+        fixture.detectChanges();
+
+        expect(fixture.debugElement.nativeElement.classList.contains('adf-is-selected'))
+            .not.toBe(true);
+    });
+
     it('should set aria selected to true when row is selected', () => {
         row.isSelected = true;
         component.row = row;
@@ -71,6 +79,11 @@ describe('DataTableRowComponent', () => {
         expect(fixture.debugElement.nativeElement.getAttribute('aria-selected')).toBe('false');
     });
 
+    it('should set aria selected to false when row is null', () => {
+        fixture.detectChanges();
+        expect(fixture.debugElement.nativeElement.getAttribute('aria-selected')).toBe('false');
+    });
+
     it('should set aria label', () => {
         spyOn(row, 'getValue').and.returnValue('some-name');
         component.row = row;
@@ -79,6 +92,17 @@ describe('DataTableRowComponent', () => {
         expect(fixture.debugElement.nativeElement.getAttribute('aria-label')).toBe('some-name');
     });
 
+    it('should set tabindex as focusable  when row is not disabled', () => {
+        fixture.detectChanges();
+        expect(fixture.debugElement.nativeElement.getAttribute('tabindex')).toBe('0');
+    });
+
+    it('should not set tabindex when row is disabled', () => {
+        component.disabled = true;
+        fixture.detectChanges();
+        expect(fixture.debugElement.nativeElement.getAttribute('tabindex')).toBe(null);
+    });
+
     it('should focus element', () => {
         expect(document.activeElement.classList.contains('adf-datatable-row')).toBe(false);
 

lib/core/datatable/components/datatable/datatable-row.component.ts

@@ -41,24 +41,40 @@ import { DataRow } from '../../data/data-row.model';
 export class DataTableRowComponent implements FocusableOption {
     @Input() row: DataRow;
 
+    @Input() disabled = false;
+
     @Output()
     select: EventEmitter<any> = new EventEmitter<any>();
 
     @HostBinding('class.adf-is-selected')
     get isSelected(): boolean {
+        if (!this.row) {
+            return false;
+        }
         return this.row.isSelected;
     }
 
     @HostBinding('attr.aria-selected')
     get isAriaSelected(): boolean {
+        if (!this.row) {
+           return false;
+        }
         return this.row.isSelected;
     }
 
     @HostBinding('attr.aria-label')
-    get ariaLabel(): boolean {
+    get ariaLabel(): string|null {
+        if (!this.row) {
+            return null;
+        }
         return this.row.getValue('name') || '';
     }
 
+    @HostBinding('attr.tabindex')
+    get tabindex(): number|null {
+        return this.disabled ? null : 0;
+    }
+
     @HostListener('keydown.space', ['$event'])
     onKeyDown(event: KeyboardEvent) {
         if ((event.target as Element).tagName === this.element.nativeElement.tagName) {

lib/core/datatable/components/datatable/datatable.component.html

@@ -6,7 +6,12 @@
     [class.adf-sticky-header]="isStickyHeaderEnabled()"
     [class.adf-datatable--empty]="!isHeaderVisible()">
     <div *ngIf="isHeaderVisible()" class="adf-datatable-header" role="rowgroup" [ngClass]="{ 'adf-sr-only': !showHeader }">
-        <div class="adf-datatable-row" *ngIf="display === 'list'" role="row">
+        <adf-datatable-row
+            data-automation-id="datatable-row-header"
+            [disabled]="!showHeader"
+            class="adf-datatable-row"
+            *ngIf="display === 'list'"
+            role="row">
             <!-- Actions (left) -->
             <div *ngIf="actions && actionsPosition === 'left'" class="adf-actions-column adf-datatable-cell-header">
                 <span class="adf-sr-only">Actions</span>
@@ -24,7 +29,7 @@
                  (click)="onColumnHeaderClick(col)"
                  (keyup.enter)="onColumnHeaderClick(col)"
                  role="columnheader"
-                 [tabindex]="showHeader ? 0 : -1"
+                 [attr.tabindex]="showHeader ? 0 : null"
                  [attr.aria-sort]="col.sortable ? (getAriaSort(col) | translate) : null"
                  title="{{ col.title | translate }}"
                  adf-drop-zone dropTarget="header" [dropColumn]="col">
@@ -35,7 +40,7 @@
             <div *ngIf="actions && actionsPosition === 'right'" class="adf-actions-column adf-datatable-cell-header adf-datatable__actions-cell">
                 <span class="adf-sr-only">Actions</span>
             </div>
-        </div>
+        </adf-datatable-row>
         <mat-form-field *ngIf="display === 'gallery' && showHeader">
             <mat-select [value]="getSortingKey()" [attr.data-automation-id]="'grid-view-sorting'">
                 <mat-option *ngFor="let col of getSortableColumns()"

lib/core/datatable/components/datatable/datatable.component.scss

@@ -220,6 +220,24 @@
             color: $data-table-cell-text-color;
         }
 
+        .adf-datatable-row {
+            &:hover, &:focus {
+                background-color: $data-table-hover-color;
+            }
+
+            &:focus {
+                outline-offset: -1px;
+                outline: $data-table-outline;
+            }
+
+            .adf-cell-value, .adf-datatable-cell-header {
+                &:focus {
+                    outline-offset: -1px;
+                    outline: $data-table-outline;
+                }
+            }
+        }
+
         .adf-datatable-body {
             display: flex;
             flex-direction: column;
@@ -234,15 +252,6 @@
 
                 @include adf-no-select;
 
-                &:hover, &:focus {
-                    background-color: $data-table-hover-color;
-                }
-
-                &:focus {
-                    outline-offset: -1px;
-                    outline: $data-table-outline;
-                }
-
                 &.adf-is-selected, &.adf-is-selected:hover {
                     background-color: $data-table-selection-color;
                 }
@@ -418,11 +427,6 @@
             align-items: center;
             word-break: break-all;
             width: 100%;
-
-            &:focus {
-                outline-offset: -1px;
-                outline: $data-table-outline;
-            }
         }
 
         .adf-datatable__actions-cell, .adf-datatable-cell--image {

lib/core/datatable/components/datatable/datatable.component.spec.ts

@@ -230,6 +230,8 @@ describe('DataTable', () => {
         });
 
         dataTable.ngOnChanges({});
+        fixture.detectChanges();
+        dataTable.ngAfterViewInit();
         dataTable.onColumnHeaderClick(column);
     });
 
@@ -709,6 +711,8 @@ describe('DataTable', () => {
 
     it('should not sort if column is missing', () => {
         dataTable.ngOnChanges({ 'data': new SimpleChange('123', {}, true) });
+        fixture.detectChanges();
+        dataTable.ngAfterViewInit();
         const adapter = dataTable.data;
         spyOn(adapter, 'setSorting').and.callThrough();
         dataTable.onColumnHeaderClick(null);
@@ -717,6 +721,8 @@ describe('DataTable', () => {
 
     it('should not sort upon clicking non-sortable column header', () => {
         dataTable.ngOnChanges({ 'data': new SimpleChange('123', {}, true) });
+        fixture.detectChanges();
+        dataTable.ngAfterViewInit();
         const adapter = dataTable.data;
         spyOn(adapter, 'setSorting').and.callThrough();
 
@@ -730,6 +736,8 @@ describe('DataTable', () => {
 
     it('should set sorting upon column header clicked', () => {
         dataTable.ngOnChanges({ 'data': new SimpleChange('123', {}, true) });
+        fixture.detectChanges();
+        dataTable.ngAfterViewInit();
         const adapter = dataTable.data;
         spyOn(adapter, 'setSorting').and.callThrough();
 
@@ -749,6 +757,8 @@ describe('DataTable', () => {
 
     it('should invert sorting upon column header clicked', () => {
         dataTable.ngOnChanges({ 'data': new SimpleChange('123', {}, true) });
+        fixture.detectChanges();
+        dataTable.ngAfterViewInit();
 
         const adapter = dataTable.data;
         const sorting = new DataSorting('column_1', 'asc');
@@ -789,6 +799,8 @@ describe('DataTable', () => {
                 new ObjectDataColumn({ key: 'other', sortable: true })
             ]
         );
+        fixture.detectChanges();
+        dataTable.ngAfterViewInit();
 
         const [col1, col2] = dataTable.getSortableColumns();
 
@@ -1227,8 +1239,8 @@ describe('Accesibility', () => {
 
     it('should focus previous row on ArrowUp event', () => {
         const event = new KeyboardEvent('keyup', {
-            code: 'ArrowDown',
-            key: 'ArrowDown',
+            code: 'ArrowUp',
+            key: 'ArrowUp',
             keyCode: 38
         } as KeyboardEventInit );
 
@@ -1254,4 +1266,68 @@ describe('Accesibility', () => {
 
         expect(document.activeElement.getAttribute('data-automation-id')).toBe('datatable-row-0');
     });
+
+    it('should select header row when `showHeader` is true', () => {
+        const event = new KeyboardEvent('keyup', {
+            code: 'ArrowUp',
+            key: 'ArrowUp',
+            keyCode: 38
+        } as KeyboardEventInit );
+
+        const dataRows =
+        [ { name: 'test1'}, { name: 'test2' } ];
+
+        dataTable.data = new ObjectDataTableAdapter([],
+            [new ObjectDataColumn({ key: 'name' })]
+        );
+
+        dataTable.showHeader = true;
+
+        dataTable.ngOnChanges({
+            rows: new SimpleChange(null, dataRows, false)
+        });
+
+        fixture.detectChanges();
+        dataTable.ngAfterViewInit();
+
+        const rowElement = document.querySelector('.adf-datatable-row[data-automation-id="datatable-row-0"]');
+        const rowCellElement = rowElement.querySelector('.adf-datatable-cell');
+
+        rowCellElement.dispatchEvent(new MouseEvent('click'));
+        fixture.debugElement.nativeElement.dispatchEvent(event);
+
+        expect(document.activeElement.getAttribute('data-automation-id')).toBe('datatable-row-header');
+    });
+
+    it('should not select header row when `showHeader` is false', () => {
+        const event = new KeyboardEvent('keyup', {
+            code: 'ArrowUp',
+            key: 'ArrowUp',
+            keyCode: 38
+        } as KeyboardEventInit );
+
+        const dataRows =
+        [ { name: 'test1'}, { name: 'test2' } ];
+
+        dataTable.data = new ObjectDataTableAdapter([],
+            [new ObjectDataColumn({ key: 'name' })]
+        );
+
+        dataTable.showHeader = false;
+
+        dataTable.ngOnChanges({
+            rows: new SimpleChange(null, dataRows, false)
+        });
+
+        fixture.detectChanges();
+        dataTable.ngAfterViewInit();
+
+        const rowElement = document.querySelector('.adf-datatable-row[data-automation-id="datatable-row-0"]');
+        const rowCellElement = rowElement.querySelector('.adf-datatable-cell');
+
+        rowCellElement.dispatchEvent(new MouseEvent('click'));
+        fixture.debugElement.nativeElement.dispatchEvent(event);
+
+        expect(document.activeElement.getAttribute('data-automation-id')).toBe('datatable-row-1');
+    });
 });

lib/core/datatable/components/datatable/datatable.component.ts

@@ -223,7 +223,9 @@ export class DataTableComponent implements AfterContentInit, OnChanges, DoCheck,
     }
 
     ngAfterViewInit() {
-        this.keyManager = new FocusKeyManager(this.rowsList).withWrap();
+        this.keyManager = new FocusKeyManager(this.rowsList)
+            .withWrap()
+            .skipPredicate(item => item.disabled);
     }
 
     ngOnChanges(changes: SimpleChanges) {
@@ -406,7 +408,9 @@ export class DataTableComponent implements AfterContentInit, OnChanges, DoCheck,
         }
 
         if (row) {
-            this.keyManager.setActiveItem(this.data.getRows().indexOf(row));
+            const rowIndex = this.data.getRows().indexOf(row) + (this.isHeaderVisible() ? 1 : 0);
+            this.keyManager.setActiveItem(rowIndex);
+
             const dataRowEvent = new DataRowEvent(row, mouseEvent, this);
             this.clickObserver.next(dataRowEvent);
         }
@@ -511,6 +515,8 @@ export class DataTableComponent implements AfterContentInit, OnChanges, DoCheck,
             this.data.setSorting(new DataSorting(column.key, newDirection));
             this.emitSortingChangedEvent(column.key, newDirection);
         }
+
+        this.keyManager.updateActiveItemIndex(0);
     }
 
     onSelectAllClick(matCheckboxChange: MatCheckboxChange) {