feat: add View Transition API package (#117)

Co-authored-by: vsevolod arutyunov <v.arutyunov@tinkoff.ru>

.github/workflows/test.yml

@@ -27,6 +27,7 @@ jobs:
             speech,
             storage,
             workers,
+            view-transition,
           ]
     name: ${{ matrix.project }}
     steps:
@@ -128,6 +129,11 @@ jobs:
           directory: ./coverage/workers/
           flags: summary,workers
           name: workers
+      - uses: codecov/codecov-action@v3.1.3
+        with:
+          directory: ./coverage/view-transition/
+          flags: summary,view-transition
+          name: view-transition
 
 concurrency:
   group: test-${{ github.workflow }}-${{ github.ref }}

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "typescript.tsdk": "node_modules/typescript/lib"
+}

README.md

@@ -21,6 +21,7 @@ High quality lightweight wrappers for native Web APIs for idiomatic use with Ang
 - [`@ng-web-apis/storage`](https://github.com/taiga-family/ng-web-apis/blob/main/libs/storage/CHANGELOG.md)
 - [`@ng-web-apis/universal`](https://github.com/taiga-family/ng-web-apis/blob/main/libs/universal/CHANGELOG.md)
 - [`@ng-web-apis/workers`](https://github.com/taiga-family/ng-web-apis/blob/main/libs/workers/CHANGELOG.md)
+- [`@ng-web-apis/view-transition`](https://github.com/taiga-family/ng-web-apis/blob/main/libs/view-transition/CHANGELOG.md)
 
 ## Core team
 

apps/demo/src/app/app.routes.ts

@@ -87,6 +87,12 @@ export const appRoutes: Routes = [
         loadChildren: async () =>
             (await import(`./pages/workers/workers-page.module`)).WorkersPageModule,
     },
+    {
+        path: DemoPath.ViewTransitionPage,
+        loadChildren: async () =>
+            (await import(`./pages/view-transition/view-transition-page.module`))
+                .ViewTransitionPageModule,
+    },
     {
         path: '',
         redirectTo: DemoPath.HomePage,

apps/demo/src/app/constants/demo-path.ts

@@ -14,4 +14,5 @@ export enum DemoPath {
     PermissionsPage = `permissions`,
     StoragePage = `storage`,
     WorkersPage = `workers`,
+    ViewTransitionPage = `view-transition`,
 }

apps/demo/src/app/pages/home/home-page.component.html

@@ -235,3 +235,18 @@ <h2>Workers</h2>
         class="icon"
     />
 </a>
+<a class="link" [routerLink]="['/', link.ViewTransitionPage]">
+    <div>
+        <h2>View Transition</h2>
+        A library for declarative use of
+        <strong>View Transition API</strong>
+        with Angular
+    </div>
+    <img
+        src="assets/images/view-transition.svg"
+        width="64"
+        height="64"
+        alt="View transition API logo"
+        class="icon"
+    />
+</a>

apps/demo/src/app/pages/view-transition/view-transition-page.component.html

@@ -0,0 +1,37 @@
+<h2>How to use</h2>
+<p>
+    Usage is pretty simple: just import service in your component and call
+    <code>startViewTransition</code>
+    on it.
+</p>
+<pre><code [highlight]="codeSample" [languages]="['ts']"></code></pre>
+<h2>Basic example</h2>
+
+<ng-container
+    *tuiLet="{ detailInfo: detailInfo$ | async, activeIndex: activeIndex$ | async } as context"
+>
+    <div *ngIf="!context.detailInfo" class="photos">
+        <div
+            *ngFor="let item of data; let index = index"
+            class="photo"
+            (click)="open(index)"
+        >
+            <span class="author">
+                Photo by
+                <a target="_blank" [href]="item.url">{{item.author}}</a>
+            </span>
+            <img
+                [src]="item.src"
+                [style.viewTransitionName]="context.activeIndex === index ? 'expandable-image' : null"
+            />
+        </div>
+    </div>
+
+    <div *ngIf="context.detailInfo" class="expanded-photo">
+        <img [src]="context.detailInfo.src" (click)="close()" />
+    </div>
+</ng-container>
+
+<a tuiLink href="https://www.pexels.com" target="_blank">
+    Photos provided by Pexels
+</a>

apps/demo/src/app/pages/view-transition/view-transition-page.component.less

@@ -0,0 +1,56 @@
+:host {
+    display: flex;
+    align-items: center;
+    flex-direction: column;
+}
+
+.photos {
+    display: flex;
+    justify-content: center;
+    align-items: flex-start;
+    flex-wrap: wrap;
+    gap: 1rem;
+    margin: 1rem 0;
+}
+
+.photo {
+    width: 12rem;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    cursor: pointer;
+
+    .author {
+        margin-bottom: 0.5rem;
+
+        a:hover {
+            text-decoration: underline;
+        }
+    }
+
+    img {
+        display: block;
+        width: 100%;
+        border-radius: 0.5rem;
+        transition: transform 0.2s;
+
+        &:hover {
+            transform: scale(1.05);
+        }
+    }
+}
+
+.expanded-photo {
+    margin: 0 auto 1rem;
+    width: 20rem;
+    display: flex;
+    cursor: pointer;
+
+    img {
+        display: block;
+        view-transition-name: expandable-image;
+        border-radius: 1rem;
+        box-shadow: 0 12px 36px rgba(0, 0, 0, 0.2);
+        width: 100%;
+    }
+}

apps/demo/src/app/pages/view-transition/view-transition-page.component.ts

@@ -0,0 +1,87 @@
+import {ChangeDetectionStrategy, ChangeDetectorRef, Component} from '@angular/core';
+import {BehaviorSubject, takeUntil} from 'rxjs';
+import {ViewTransitionService} from '@ng-web-apis/view-transition';
+import {TuiDestroyService} from '@taiga-ui/cdk';
+
+interface Photo {
+    src: string;
+    author: string;
+    url: string;
+}
+
+const PHOTOS: readonly Photo[] = [
+    {
+        src: 'https://images.pexels.com/photos/16316785/pexels-photo-16316785/free-photo-of-fluffy-cat-on-blooming-tree-background.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1',
+        author: 'Peng Louis',
+        url: 'https://www.pexels.com/photo/fluffy-cat-on-blooming-tree-background-16316785/',
+    },
+    {
+        src: 'https://images.pexels.com/photos/6001385/pexels-photo-6001385.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1',
+        author: 'Sam Lion',
+        url: 'https://www.pexels.com/photo/cute-curious-cat-watching-video-on-laptop-sitting-on-couch-6001385/',
+    },
+    {
+        src: 'https://images.pexels.com/photos/7210265/pexels-photo-7210265.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1',
+        author: 'Blue Bird',
+        url: 'https://www.pexels.com/photo/ginger-cat-sleeping-on-ground-in-autumn-7210265/',
+    },
+];
+
+const USAGE_SAMPLE = `
+    // 1) Import service throught DI
+    // In Constructor
+    constructor(private viewTransitionService: ViewTransitionService) {}
+    // or with inject (Angular 14+)
+    private service = inject(ViewTransitionService);
+    
+    // 2) Call startViewTransition method and pass callback that would change the DOM
+    private showMyComponent(): void {
+        this.viewTransitionService.startViewTransition(() => {
+            this.showMyComponent = true;
+            // You might want to call detectChanges to update the DOM inside startViewTransition callback
+            this.cdr.detectChanges();
+        }).subscribe();
+    }
+`;
+
+@Component({
+    selector: `view-transition-page`,
+    templateUrl: `./view-transition-page.component.html`,
+    styleUrls: [`./view-transition-page.component.less`],
+    changeDetection: ChangeDetectionStrategy.OnPush,
+    providers: [TuiDestroyService],
+})
+export class ViewTransitionPageComponent {
+    readonly codeSample = USAGE_SAMPLE;
+    readonly data = PHOTOS;
+    readonly activeIndex$ = new BehaviorSubject(-1);
+    readonly detailInfo$ = new BehaviorSubject<Photo | undefined>(undefined);
+
+    constructor(
+        private readonly viewTransitionService: ViewTransitionService,
+        private readonly cdr: ChangeDetectorRef,
+        private readonly destroy$: TuiDestroyService,
+    ) {}
+
+    open(index: number): void {
+        this.activeIndex$.next(index);
+        this.viewTransitionService
+            .startViewTransition(() => {
+                this.detailInfo$.next(this.data[index]);
+                this.cdr.detectChanges();
+            })
+            .pipe(takeUntil(this.destroy$))
+            .subscribe();
+    }
+
+    close(): void {
+        this.viewTransitionService
+            .startViewTransition(() => {
+                this.detailInfo$.next(undefined);
+                this.cdr.detectChanges();
+                this.activeIndex$.next(-1);
+            })
+            .pipe(takeUntil(this.destroy$))
+            .subscribe();
+    }
+}

apps/demo/src/app/pages/view-transition/view-transition-page.module.ts

@@ -0,0 +1,19 @@
+import {NgModule} from '@angular/core';
+import {ViewTransitionPageComponent} from './view-transition-page.component';
+import {RouterModule} from '@angular/router';
+import {CommonModule} from '@angular/common';
+import {HighlightModule} from 'ngx-highlightjs';
+import {TuiLinkModule} from '@taiga-ui/core';
+import {TuiLetModule} from '@taiga-ui/cdk';
+
+@NgModule({
+    imports: [
+        CommonModule,
+        HighlightModule,
+        TuiLinkModule,
+        TuiLetModule,
+        RouterModule.forChild([{path: '', component: ViewTransitionPageComponent}]),
+    ],
+    declarations: [ViewTransitionPageComponent],
+})
+export class ViewTransitionPageModule {}

apps/demo/tsconfig.app.json

@@ -2,8 +2,7 @@
     "extends": "../../tsconfig.json",
     "files": ["src/main.ts", "src/polyfills.ts"],
     "compilerOptions": {
-        "outDir": "./out-tsc/app",
-        "types": ["webmidi"]
+        "outDir": "./out-tsc/app"
     },
     "include": ["**/*.d.ts"],
     "angularCompilerOptions": {

apps/demo/tsconfig.server.json

@@ -3,7 +3,7 @@
     "compilerOptions": {
         "outDir": "./dist/out-tsc-server",
         "target": "es2016",
-        "types": ["node", "webmidi"]
+        "types": ["node", "webmidi", "dom-view-transitions"]
     },
     "files": ["src/typings.d.ts", "src/main.server.ts", "server.ts"],
     "angularCompilerOptions": {