feat(module:carousel): support custom strategies

components/carousel/doc/index.en-US.md

@@ -28,19 +28,28 @@ import { NzCarouselModule } from 'ng-zorro-antd';
 | -------- | ----------- | ---- | ------- |
 | `[nzAutoPlay]` | Whether to scroll automatically | `boolean` | `false` |
 | `[nzAutoPlaySpeed]` | Duration (milliseconds), does not scroll when set to 0 | `number` | `3000` |
-| `[nzDots]` | Whether to show the dots at the bottom of the gallery | `boolean` | `true` |
 | `[nzDotRender]` | Dot render template | `TemplateRef<{ $implicit: number }>` | - |
-| `[nzEffect]` | Transition effect | `'scrollx'｜'fade'` | `'scrollx'` |
+| `[nzDots]` | Whether to show the dots at the bottom of the gallery | `boolean` | `true` |
+| `[nzEffect]` | Transition effect | `'scrollx'\|'fade'` | `'scrollx'` |
+| `[nzEnableSwipe]` | Whether to support swipe gesture | `boolean` | `true` |
 | `[nzVertical]` | Whether to use a vertical display | `boolean` | `false` |
 | `(nzAfterChange)` | Callback function called after the current index changes | `EventEmitter<number>` | - |
 | `(nzBeforeChange)` | Callback function called before the current index changes | `EventEmitter{ from: number; to: number }>` | - |
-| `[nzEnableSwipe]` | Whether to support swipe gesture | `boolean` | `true` |
 
 #### Methods
 
 | Name | Description |
 | ---- | ----------- |
-| goTo(slideNumber) | Change current slide to given slide number |
-| next() | Change current slide to next slide |
-| pre() | Change current slide to previous slide |
+| `goTo(slideNumber)` | Change current slide to given slide number |
+| `next()` | Change current slide to next slide |
+| `pre()` | Change current slide to previous slide |
+
+### InjectionToken
+
+| Token | Description | Parameters | Default Value |
+| ----- | --- | ---- | --- |
+| `NZ_CAROUSEL_CUSTOM_STRATEGIES` | Provide custom transitioning strategies | `CarouselStrategyRegistryItem[]` | - |
+
+### Customizing transition effects
 
+From version `7.5.0`, you can provide strategies that extends `NzCarouselBaseStrategy` to implement custom transition effects.

components/carousel/doc/index.zh-CN.md

@@ -29,18 +29,28 @@ import { NzCarouselModule } from 'ng-zorro-antd';
 | --- | --- | --- | --- |
 | `[nzAutoPlay]` | 是否自动切换 | `boolean` | `false` |
 | `[nzAutoPlaySpeed]` | 切换时间(毫秒)，当设置为0时不切换 | `number` | `3000` |
-| `[nzDots]` | 是否显示面板指示点 | `boolean` | `true` |
 | `[nzDotRender]` | Dot渲染模板 | `TemplateRef<{ $implicit: number }>` | - |
-| `[nzEffect]` | 动画效果函数，可取 scrollx, fade | `'scrollx'｜'fade'` | `'scrollx'` |
+| `[nzDots]` | 是否显示面板指示点 | `boolean` | `true` |
+| `[nzEffect]` | 动画效果函数，可取 `scrollx`, `fade` | `'scrollx'\|'fade'`|`'scrollx'` |
+| `[nzEnableSwipe]` | 是否支持手势划动切换 | `boolean` | `true` |
 | `[nzVertical]` | 垂直显示 | `boolean` | `false` |
 | `(nzAfterChange)` | 切换面板的回调 | `EventEmitter<number>` | - |
 | `(nzBeforeChange)` | 切换面板的回调 | `EventEmitter<{ from: number; to: number }>` | - |
-| `[nzEnableSwipe]` | 是否支持手势划动切换 | `boolean` | `true` |
+
 #### 方法
 
 | 名称 | 描述 |
 | --- | --- |
-| goTo(slideNumber) | 切换到指定面板 |
-| next() | 切换到下一面板 |
-| pre() | 切换到上一面板 |
+| `goTo(slideNumber)` | 切换到指定面板 |
+| `next()` | 切换到下一面板 |
+| `pre()` | 切换到上一面板 |
+
+### InjectionToken
+
+| Token | 说明 | 参数 | 默认值 | 
+| ----- | --- | ---- | --- |
+| `NZ_CAROUSEL_CUSTOM_STRATEGIES` | 提供用户自定义的切换效果 | `CarouselStrategyRegistryItem[]` | - |
+
+### 自定义切换效果
 
+从 `7.5.0` 版本开始，你可以提供自定义的切换效果，切换效果应当继承 `NzCarouselBaseStrategy` 类（默认的两种切换效果同样基于该类）。

components/carousel/nz-carousel-definitions.ts

@@ -6,10 +6,12 @@
  * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
  */
 
-import { QueryList } from '@angular/core';
+import { InjectionToken, QueryList } from '@angular/core';
 import { NzCarouselContentDirective } from './nz-carousel-content.directive';
+import { NzCarouselBaseStrategy } from './strategies/base-strategy';
 
-export type NzCarouselEffects = 'fade' | 'scrollx';
+// Support string for custom transition effect.
+export type NzCarouselEffects = 'fade' | 'scrollx' | string;
 
 export interface NzCarouselComponentAsSource {
   carouselContents: QueryList<NzCarouselContentDirective>;
@@ -30,3 +32,12 @@ export interface FromToInterface {
   from: number;
   to: number;
 }
+
+export interface CarouselStrategyRegistryItem {
+  name: string;
+  strategy: NzCarouselBaseStrategy;
+}
+
+export const NZ_CAROUSEL_CUSTOM_STRATEGIES = new InjectionToken<CarouselStrategyRegistryItem[]>(
+  'nz-carousel-custom-strategies'
+);

components/carousel/nz-carousel.component.ts

@@ -23,6 +23,7 @@ import {
   NgZone,
   OnChanges,
   OnDestroy,
+  Optional,
   Output,
   QueryList,
   Renderer2,
@@ -37,7 +38,13 @@ import { isTouchEvent, InputBoolean, InputNumber } from 'ng-zorro-antd/core';
 import { takeUntil, throttleTime } from 'rxjs/operators';
 
 import { NzCarouselContentDirective } from './nz-carousel-content.directive';
-import { FromToInterface, NzCarouselEffects, PointerVector } from './nz-carousel-definitions';
+import {
+  CarouselStrategyRegistryItem,
+  FromToInterface,
+  NzCarouselEffects,
+  NZ_CAROUSEL_CUSTOM_STRATEGIES,
+  PointerVector
+} from './nz-carousel-definitions';
 import { NzCarouselBaseStrategy } from './strategies/base-strategy';
 import { NzCarouselOpacityStrategy } from './strategies/opacity-strategy';
 import { NzCarouselTransformStrategy } from './strategies/transform-strategy';
@@ -111,7 +118,8 @@ export class NzCarouselComponent implements AfterContentInit, AfterViewInit, OnD
     private renderer: Renderer2,
     private cdr: ChangeDetectorRef,
     private ngZone: NgZone,
-    private platform: Platform
+    private platform: Platform,
+    @Optional() @Inject(NZ_CAROUSEL_CUSTOM_STRATEGIES) private customStrategies: CarouselStrategyRegistryItem[]
   ) {
     this.document = document;
     this.renderer.addClass(elementRef.nativeElement, 'ant-carousel');
@@ -223,6 +231,14 @@ export class NzCarouselComponent implements AfterContentInit, AfterViewInit, OnD
       this.strategy.dispose();
     }
 
+    // Load custom strategies first.
+    const customStrategy = this.customStrategies ? this.customStrategies.find(s => s.name === this.nzEffect) : null;
+    if (customStrategy) {
+      // tslint:disable-next-line:no-any
+      this.strategy = new (customStrategy.strategy as any)(this, this.cdr, this.renderer);
+      return;
+    }
+
     this.strategy =
       this.nzEffect === 'scrollx'
         ? new NzCarouselTransformStrategy(this, this.cdr, this.renderer)

components/carousel/nz-carousel.spec.ts

@@ -6,8 +6,44 @@ import { By } from '@angular/platform-browser';
 import { dispatchKeyboardEvent } from 'ng-zorro-antd/core';
 
 import { NzCarouselContentDirective } from './nz-carousel-content.directive';
+import { NZ_CAROUSEL_CUSTOM_STRATEGIES } from './nz-carousel-definitions';
 import { NzCarouselComponent } from './nz-carousel.component';
 import { NzCarouselModule } from './nz-carousel.module';
+import { NzCarouselOpacityStrategy } from './strategies/opacity-strategy';
+
+@Component({
+  selector: 'nz-test-carousel-basic',
+  template: `
+    <nz-carousel
+      [nzEffect]="effect"
+      [nzVertical]="vertical"
+      [nzDots]="dots"
+      [nzDotRender]="dotRender"
+      [nzAutoPlay]="autoPlay"
+      [nzAutoPlaySpeed]="autoPlaySpeed"
+      (nzAfterChange)="afterChange($event)"
+      (nzBeforeChange)="beforeChange($event)"
+    >
+      <div nz-carousel-content *ngFor="let index of array">
+        <h3>{{ index }}</h3>
+      </div>
+      <ng-template #dotRender let-index
+        ><a>{{ index + 1 }}</a></ng-template
+      >
+    </nz-carousel>
+  `
+})
+export class NzTestCarouselBasicComponent {
+  @ViewChild(NzCarouselComponent) nzCarouselComponent: NzCarouselComponent;
+  dots = true;
+  vertical = false;
+  effect = 'scrollx';
+  array = [1, 2, 3, 4];
+  autoPlay = false;
+  autoPlaySpeed = 3000;
+  afterChange = jasmine.createSpy('afterChange callback');
+  beforeChange = jasmine.createSpy('beforeChange callback');
+}
 
 describe('carousel', () => {
   beforeEach(fakeAsync(() => {
@@ -296,39 +332,46 @@ describe('carousel', () => {
   });
 });
 
-@Component({
-  selector: 'nz-test-carousel-basic',
-  template: `
-    <nz-carousel
-      [nzEffect]="effect"
-      [nzVertical]="vertical"
-      [nzDots]="dots"
-      [nzDotRender]="dotRender"
-      [nzAutoPlay]="autoPlay"
-      [nzAutoPlaySpeed]="autoPlaySpeed"
-      (nzAfterChange)="afterChange($event)"
-      (nzBeforeChange)="beforeChange($event)"
-    >
-      <div nz-carousel-content *ngFor="let index of array">
-        <h3>{{ index }}</h3>
-      </div>
-      <ng-template #dotRender let-index
-        ><a>{{ index + 1 }}</a></ng-template
-      >
-    </nz-carousel>
-  `
-})
-export class NzTestCarouselBasicComponent {
-  @ViewChild(NzCarouselComponent) nzCarouselComponent: NzCarouselComponent;
-  dots = true;
-  vertical = false;
-  effect = 'scrollx';
-  array = [1, 2, 3, 4];
-  autoPlay = false;
-  autoPlaySpeed = 3000;
-  afterChange = jasmine.createSpy('afterChange callback');
-  beforeChange = jasmine.createSpy('beforeChange callback');
-}
+describe('carousel custom strategies', () => {
+  let fixture: ComponentFixture<NzTestCarouselBasicComponent>;
+  let testComponent: NzTestCarouselBasicComponent;
+  let carouselWrapper: DebugElement;
+  let carouselContents: DebugElement[];
+
+  beforeEach(fakeAsync(() => {
+    TestBed.configureTestingModule({
+      imports: [NzCarouselModule],
+      declarations: [NzTestCarouselBasicComponent],
+      providers: [
+        {
+          provide: NZ_CAROUSEL_CUSTOM_STRATEGIES,
+          useValue: [
+            {
+              name: 'fade',
+              strategy: NzCarouselOpacityStrategy
+            }
+          ]
+        }
+      ]
+    });
+  }));
+
+  it('could use custom strategies', fakeAsync(() => {
+    fixture = TestBed.createComponent(NzTestCarouselBasicComponent);
+    fixture.detectChanges();
+    testComponent = fixture.debugElement.componentInstance;
+    carouselWrapper = fixture.debugElement.query(By.directive(NzCarouselComponent));
+    carouselContents = fixture.debugElement.queryAll(By.directive(NzCarouselContentDirective));
+
+    // The custom provided strategy should also do the work.
+    testComponent.effect = 'fade';
+    fixture.detectChanges();
+    expect(carouselContents[0].nativeElement.classList).toContain('slick-active');
+    carouselWrapper.nativeElement.querySelector('.slick-dots').lastElementChild.click();
+    tickMilliseconds(fixture, 700);
+    expect(carouselWrapper.nativeElement.querySelector('.slick-track').style.transform).toBe('');
+  }));
+});
 
 function tickMilliseconds<T>(fixture: ComponentFixture<T>, seconds: number = 1): void {
   fixture.detectChanges();

components/carousel/public-api.ts

@@ -10,3 +10,4 @@ export * from './nz-carousel.module';
 export * from './nz-carousel.component';
 export * from './nz-carousel-content.directive';
 export * from './nz-carousel-definitions';
+export * from './strategies/base-strategy';

tsconfig.json

@@ -9,7 +9,7 @@
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "target": "es5",
-    "typeRoots": ["../../node_modules/@types/!(node)"],
+    "typeRoots": ["node_modules/@types/!(node)"],
     "lib": ["es2017", "dom"],
     "noUnusedParameters": true,
     "noUnusedLocals": true,