fix(module:transfer): cancel selecting all should emit nzSelectChange event (#8872)

Author: WwwHhhYran

components/transfer/interface.ts

@@ -44,6 +44,7 @@ export interface TransferStat {
   checkHalf: boolean;
   checkCount: number;
   shownCount: number;
+  availableCount: number;
 }
 
 export interface RenderListContext {

components/transfer/transfer-list.component.ts

@@ -44,7 +44,7 @@ import { NzTransferSearchComponent } from './transfer-search.component';
           [nzChecked]="stat.checkAll"
           (nzCheckedChange)="onItemSelectAll($event)"
           [nzIndeterminate]="stat.checkHalf"
-          [nzDisabled]="stat.shownCount === 0 || disabled"
+          [nzDisabled]="stat.availableCount === 0 || disabled"
         ></label>
       }
       <span class="ant-transfer-list-header-selected">
@@ -175,13 +175,19 @@ export class NzTransferListComponent implements AfterViewInit {
     checkAll: false,
     checkHalf: false,
     checkCount: 0,
-    shownCount: 0
+    shownCount: 0,
+    availableCount: 0
   };
 
   get validData(): TransferItem[] {
     return this.dataSource.filter(w => !w.hide);
   }
 
+  get availableData(): TransferItem[] {
+    // filter disabled data
+    return this.validData.filter(w => !w.disabled);
+  }
+
   onItemSelect = (item: TransferItem): void => {
     if (this.disabled || item.disabled) {
       return;
@@ -206,6 +212,7 @@ export class NzTransferListComponent implements AfterViewInit {
     const validCount = this.dataSource.filter(w => !w.disabled).length;
     this.stat.checkCount = this.dataSource.filter(w => w.checked && !w.disabled).length;
     this.stat.shownCount = this.validData.length;
+    this.stat.availableCount = this.availableData.length;
     this.stat.checkAll = validCount > 0 && validCount === this.stat.checkCount;
     this.stat.checkHalf = this.stat.checkCount > 0 && !this.stat.checkAll;
     // Note: this is done explicitly since the internal `nzChecked` value may not be updated in edge cases.
@@ -233,6 +240,7 @@ export class NzTransferListComponent implements AfterViewInit {
       item.hide = value.length > 0 && !this.matchFilter(value, item);
     });
     this.stat.shownCount = this.validData.length;
+    this.stat.availableCount = this.availableData.length;
     this.filterChange.emit({ direction: this.direction, value });
   }
 

components/transfer/transfer.component.ts

@@ -245,11 +245,8 @@ export class NzTransferComponent implements OnInit, OnChanges, OnDestroy {
 
   handleSelect(direction: TransferDirection, checked: boolean, item?: TransferItem): void {
     const list = this.getCheckedData(direction);
-    if (list.every(i => i.disabled)) {
-      this.updateOperationStatus(direction, 0);
-      return;
-    }
-    this.updateOperationStatus(direction, list.length);
+    const count = list.filter(i => !i.disabled).length;
+    this.updateOperationStatus(direction, count);
     this.nzSelectChange.emit({ direction, checked, list, item });
   }
 

components/transfer/transfer.spec.ts

@@ -247,6 +247,13 @@ describe('transfer', () => {
         const selectorPath = '[data-direction="left"] .ant-transfer-list-header .ant-checkbox-disabled';
         expect(pageObject.leftList.querySelectorAll(selectorPath).length).toBe(1);
       });
+
+      it('should be disabled check all when all options are disabled', () => {
+        instance.nzDataSource = [{ title: `content`, disabled: true }];
+        fixture.detectChanges();
+        const cls = '[data-direction="left"] .ant-transfer-list-header .ant-checkbox-disabled';
+        expect(debugElement.queryAll(By.css(cls)).length).toBe(1);
+      });
     });
 
     it('#nzShowSelectAll', () => {