fix(option group): propagate disabled state to child options

src/framework/theme/components/select/option-group.component.spec.ts

@@ -0,0 +1,148 @@
+import { Component, ViewChild } from '@angular/core';
+import { ComponentFixture, fakeAsync, flush, TestBed } from '@angular/core/testing';
+import { By } from '@angular/platform-browser';
+import { RouterTestingModule } from '@angular/router/testing';
+import {
+  NbLayoutModule,
+  NbOptionComponent,
+  NbOptionGroupComponent,
+  NbSelectModule,
+  NbSelectComponent,
+  NbThemeModule,
+} from '@nebular/theme';
+
+@Component({
+  template: `
+    <nb-layout>
+      <nb-layout-column>
+
+        <nb-select [disabled]="selectDisabled">
+          <nb-option-group [disabled]="optionGroupDisabled" [title]="optionGroupTitle">
+            <nb-option *ngIf="showOption" [value]="1" [disabled]="optionDisabled">1</nb-option>
+          </nb-option-group>
+        </nb-select>
+
+      </nb-layout-column>
+    </nb-layout>
+  `,
+})
+export class NbOptionGroupTestComponent {
+  selectDisabled: boolean = false;
+  optionGroupDisabled: boolean = false;
+  optionDisabled: boolean = false;
+  showOption: boolean = true;
+  optionGroupTitle: string = '';
+
+  @ViewChild(NbSelectComponent) selectComponent: NbSelectComponent<number>;
+  @ViewChild(NbOptionGroupComponent) optionGroupComponent: NbOptionGroupComponent;
+  @ViewChild(NbOptionComponent) optionComponent: NbOptionComponent<number>;
+}
+
+describe('NbOptionGroupComponent', () => {
+  let fixture: ComponentFixture<NbOptionGroupTestComponent>;
+  let testComponent: NbOptionGroupTestComponent;
+  let selectComponent: NbSelectComponent<number>;
+  let optionGroupComponent: NbOptionGroupComponent;
+  let optionComponent: NbOptionComponent<number>;
+
+  beforeEach(fakeAsync(() => {
+    TestBed.configureTestingModule({
+      imports: [
+        RouterTestingModule.withRoutes([]),
+        NbThemeModule.forRoot(),
+        NbLayoutModule,
+        NbSelectModule,
+      ],
+      declarations: [ NbOptionGroupTestComponent ],
+    });
+
+    fixture = TestBed.createComponent(NbOptionGroupTestComponent);
+    testComponent = fixture.componentInstance;
+    fixture.detectChanges();
+    flush();
+
+    selectComponent = testComponent.selectComponent;
+    optionGroupComponent = testComponent.optionGroupComponent;
+    optionComponent = testComponent.optionComponent;
+  }));
+
+  it('should contain passed title', () => {
+    const title = 'random option group title';
+    selectComponent.show();
+    testComponent.optionGroupTitle = title;
+    fixture.detectChanges();
+
+    const groupTitle = fixture.debugElement.query(By.directive(NbOptionGroupComponent))
+      .query(By.css('.option-group-title'));
+
+    expect(groupTitle.nativeElement.textContent).toEqual(title);
+  });
+
+  it('should have disabled attribute if disabled', () => {
+    selectComponent.show();
+    testComponent.optionGroupDisabled = true;
+    fixture.detectChanges();
+
+    const optionGroup = fixture.debugElement.query(By.directive(NbOptionGroupComponent));
+    expect(optionGroup.attributes.disabled).toEqual('');
+  });
+
+  it('should remove disabled attribute if disabled set to false', () => {
+    selectComponent.show();
+    testComponent.optionGroupDisabled = true;
+    fixture.detectChanges();
+
+    testComponent.optionGroupDisabled = false;
+    fixture.detectChanges();
+
+    const optionGroup = fixture.debugElement.query(By.directive(NbOptionGroupComponent));
+    expect(optionGroup.attributes.disabled).toEqual(null);
+  });
+
+  it('should disable options if set disabled', () => {
+    const setDisabledSpy = spyOn(optionComponent, 'setDisabledByGroupState');
+
+    optionGroupComponent.disabled = true;
+    fixture.detectChanges();
+
+    expect(setDisabledSpy).toHaveBeenCalledTimes(1);
+    expect(setDisabledSpy).toHaveBeenCalledWith(true);
+  });
+
+  it('should enable options if set enabled', () => {
+    testComponent.optionDisabled = true;
+    fixture.detectChanges();
+
+    expect(optionComponent.disabled).toEqual(true);
+
+    const setDisabledSpy = spyOn(optionComponent, 'setDisabledByGroupState');
+    optionGroupComponent.disabled = false;
+
+    expect(setDisabledSpy).toHaveBeenCalledTimes(1);
+    expect(setDisabledSpy).toHaveBeenCalledWith(false);
+  });
+
+  it('should update options state when options change', fakeAsync(() => {
+    testComponent.optionGroupDisabled = true;
+    testComponent.showOption = false;
+    fixture.detectChanges();
+    flush();
+
+    testComponent.showOption = true;
+    fixture.detectChanges();
+    flush();
+    fixture.detectChanges();
+
+    expect(optionComponent.disabledAttribute).toEqual('');
+  }));
+
+  it('should update options state after content initialisation', fakeAsync(() => {
+    fixture = TestBed.createComponent(NbOptionGroupTestComponent);
+    testComponent = fixture.componentInstance;
+    testComponent.optionDisabled = true;
+    fixture.detectChanges();
+    flush();
+
+    expect(testComponent.optionComponent.disabledAttribute).toEqual('');
+  }));
+});

src/framework/theme/components/select/option-group.component.ts

@@ -4,9 +4,20 @@
  * Licensed under the MIT License. See License.txt in the project root for license information.
  */
 
-import { ChangeDetectionStrategy, Component, HostBinding, Input } from '@angular/core';
-import { convertToBoolProperty } from '../helpers';
+import {
+  AfterContentInit,
+  ChangeDetectionStrategy,
+  Component,
+  ContentChildren,
+  HostBinding,
+  Input,
+  OnDestroy,
+  QueryList,
+} from '@angular/core';
+import { takeWhile } from 'rxjs/operators';
 
+import { convertToBoolProperty } from '../helpers';
+import { NbOptionComponent } from './option.component';
 
 @Component({
   selector: 'nb-option-group',
@@ -17,7 +28,10 @@ import { convertToBoolProperty } from '../helpers';
     <ng-content select="nb-option, ng-container"></ng-content>
   `,
 })
-export class NbOptionGroupComponent {
+export class NbOptionGroupComponent implements AfterContentInit, OnDestroy {
+
+  protected alive: boolean = true;
+
   @Input() title: string;
 
   @Input()
@@ -26,13 +40,49 @@ export class NbOptionGroupComponent {
   }
   set disabled(value: boolean) {
     this._disabled = convertToBoolProperty(value);
+
+    if (this.options) {
+      this.updateOptionsDisabledState();
+    }
   }
   protected _disabled: boolean = false;
 
   @HostBinding('attr.disabled')
   get disabledAttribute(): '' | null {
     return this.disabled ? '' : null;
   }
+
+  @ContentChildren(NbOptionComponent, { descendants: true }) options: QueryList<NbOptionComponent<any>>;
+
+  ngAfterContentInit() {
+    if (this.options.length) {
+      this.asyncUpdateOptionsDisabledState();
+    }
+
+    this.options.changes
+      .pipe(takeWhile(() => this.alive))
+      .subscribe(() => this.asyncUpdateOptionsDisabledState());
+  }
+
+  ngOnDestroy() {
+    this.alive = false;
+  }
+
+  /**
+   * Sets disabled state for each option to current group disabled state.
+   */
+  protected updateOptionsDisabledState(): void {
+    this.options.forEach((option: NbOptionComponent<any>) => option.setDisabledByGroupState(this.disabled));
+  }
+
+  /**
+   * Updates options disabled state after promise resolution.
+   * This way change detection will be triggered after options state updated.
+   * Use this method when updating options during change detection run (e.g. QueryList.changes, lifecycle hooks).
+   */
+  protected asyncUpdateOptionsDisabledState(): void {
+    Promise.resolve().then(() => this.updateOptionsDisabledState());
+  }
 }
 
 

src/framework/theme/components/select/option.component.ts

@@ -42,6 +42,9 @@ import { NbSelectComponent } from './select.component';
   `,
 })
 export class NbOptionComponent<T> implements OnDestroy {
+
+  protected disabledByGroup: boolean = false;
+
   /**
    * Option value that will be fired on selection.
    * */
@@ -103,7 +106,7 @@ export class NbOptionComponent<T> implements OnDestroy {
 
   @HostBinding('attr.disabled')
   get disabledAttribute(): '' | null {
-    return this.disabled ? '' : null;
+    return (this.disabledByGroup || this.disabled) ? '' : null;
   }
 
   @HostListener('click')
@@ -119,6 +122,17 @@ export class NbOptionComponent<T> implements OnDestroy {
     this.setSelection(false);
   }
 
+  /**
+   * Sets disabled by group state and marks component for check.
+   * @param disabled group disabled state
+   */
+  setDisabledByGroupState(disabled: boolean): void {
+    if (this.disabledByGroup !== disabled) {
+      this.disabledByGroup = disabled;
+      this.cd.markForCheck();
+    }
+  }
+
   protected setSelection(selected: boolean): void {
     /**
      * In case of changing options in runtime the reference to the selected option will be kept in select component.

src/framework/theme/components/select/select.spec.ts

@@ -19,6 +19,7 @@ import { NB_DOCUMENT } from '../../theme.options';
 import { NbSelectComponent } from './select.component';
 import { NbLayoutModule } from '../layout/layout.module';
 import { NbOptionComponent } from './option.component';
+import { NbOptionGroupComponent } from './option-group.component';
 
 
 const TEST_GROUPS = [
@@ -248,6 +249,30 @@ export class NbSelectWithFalsyOptionValuesComponent {
 })
 export class NbMultipleSelectWithFalsyOptionValuesComponent extends NbSelectWithFalsyOptionValuesComponent {}
 
+@Component({
+  template: `
+    <nb-layout>
+      <nb-layout-column>
+
+        <nb-select>
+          <nb-option-group [disabled]="optionGroupDisabled">
+            <nb-option [value]="1" [disabled]="optionDisabled">1</nb-option>
+          </nb-option-group>
+        </nb-select>
+
+      </nb-layout-column>
+    </nb-layout>
+  `,
+})
+export class NbOptionDisabledTestComponent {
+  optionGroupDisabled: boolean = false;
+  optionDisabled: boolean = false;
+
+  @ViewChild(NbSelectComponent) selectComponent: NbSelectComponent<number>;
+  @ViewChild(NbOptionGroupComponent) optionGroupComponent: NbOptionGroupComponent;
+  @ViewChild(NbOptionComponent) optionComponent: NbOptionComponent<number>;
+}
+
 describe('Component: NbSelectComponent', () => {
   let fixture: ComponentFixture<NbSelectTestComponent>;
   let overlayContainerService: NbOverlayContainerAdapter;
@@ -729,3 +754,61 @@ describe('NbOptionComponent', () => {
     expect(selectionChangeSpy).toHaveBeenCalledTimes(1);
   }));
 });
+
+describe('NbOptionComponent disabled', () => {
+  let fixture: ComponentFixture<NbOptionDisabledTestComponent>;
+  let testComponent: NbOptionDisabledTestComponent;
+  let selectComponent: NbSelectComponent<number>;
+  let optionGroupComponent: NbOptionGroupComponent;
+  let optionComponent: NbOptionComponent<number>;
+
+  beforeEach(fakeAsync(() => {
+    TestBed.configureTestingModule({
+      imports: [
+        RouterTestingModule.withRoutes([]),
+        NbThemeModule.forRoot(),
+        NbLayoutModule,
+        NbSelectModule,
+      ],
+      declarations: [ NbOptionDisabledTestComponent ],
+    });
+
+    fixture = TestBed.createComponent(NbOptionDisabledTestComponent);
+    testComponent = fixture.componentInstance;
+    fixture.detectChanges();
+    flush();
+
+    selectComponent = testComponent.selectComponent;
+    optionGroupComponent = testComponent.optionGroupComponent;
+    optionComponent = testComponent.optionComponent;
+  }));
+
+  it('should has disabled attribute if disabled set to true', () => {
+    selectComponent.show();
+    testComponent.optionDisabled = true;
+    fixture.detectChanges();
+
+    const option = fixture.debugElement.query(By.directive(NbOptionComponent));
+    expect(option.attributes.disabled).toEqual('');
+  });
+
+  it('should has disabled attribute if group disabled set to true', fakeAsync(() => {
+    selectComponent.show();
+    testComponent.optionGroupDisabled = true;
+    fixture.detectChanges();
+    flush();
+    fixture.detectChanges();
+
+    const option = fixture.debugElement.query(By.directive(NbOptionComponent));
+    expect(option.attributes.disabled).toEqual('');
+  }));
+
+  it('should not change disabled property if group disabled changes', fakeAsync(() => {
+    testComponent.optionGroupDisabled = true;
+    fixture.detectChanges();
+    flush();
+    fixture.detectChanges();
+
+    expect(optionComponent.disabled).toEqual(false);
+  }));
+});

src/framework/theme/index.ts

@@ -91,6 +91,9 @@ export * from './components/toastr/toastr.service';
 export * from './components/tooltip/tooltip.module';
 export * from './components/tooltip/tooltip.directive';
 export * from './components/select/select.module';
+export * from './components/select/select.component';
+export * from './components/select/option.component';
+export * from './components/select/option-group.component';
 export * from './components/window';
 export * from './components/datepicker/datepicker.module';
 export * from './components/datepicker/datepicker.directive';