我有一个Angular 5
应用程序,默认语言为French。我必须添加需要更改全局布局的阿拉伯语(必须从右到左显示内容......)。
我想知道是否有办法只使用一个组件并进行条件模板选择。例如:
--my-compenent_ar.html
--my-compenent_fr.html
--my-component.ts
And in my @Component({
moduleId: module.id,
templateUrl: ==> condition here
styleUrls: ['./sign-in.component.scss']
})
export class MyComponent
当前版本的Angular(5)本身不支持这种情况。
有没有好办法呢?
我想要做的是
--my-compenent_ar.html
--my-compenent_fr.html
--my-component.ts
--my-component.ar.ts
@Component({
moduleId: module.id,
templateUrl: './my-compenent_fr.html'
styleUrls: ['./sign-in.component.scss']
})
export class MyComponent {
....
}
@Component({
moduleId: module.id,
templateUrl: './my-compenent_ar.html'
styleUrls: ['./sign-in.component.scss']
})
export class MyComponentAR extends MyComponent {}
通过此配置,FR
区域设置将导航至MyComponent
和AR
区域设置为MyComponentAR
。
这很冗长。你有干净的方法吗?
答案 0 :(得分:1)
对于具有相同场景的用户,在我的解决方案下面仅使用一个组件并支持更改布局方向。
假设我的路线是:
const routes: Routes = [
{
path: '',
component: HomeComponent,
pathMatch: 'full'
},
{
path: 'users',
children: [
{
path: '',
component: UsersComponent
},
{
path: ':uid/profile',
component: ProfileViewComponent
}
]
}
]
想法是使用支持的语言为这些路由添加前缀。我按如下方式动态地执行此操作(我在这里仅以阿拉伯语作为前缀):
/**
* Initialize language and routes
* @param routes
* @returns {Promise<any>}
*/
init(routes: Routes): Promise<any> {
this.routes = routes;
let children: Routes = [...this.routes];
/** exclude certain routes */
for (let i = children.length - 1; i >= 0; i--) {
if (children[i].data && children[i].data['skipRouteLocalization']) {
children.splice(i, 1);
}
}
/** append children routes */
if (children && children.length) {
if (this.locales.length > 1) {
this.routes.unshift({path: 'ar', children: children});
}
}
return of(this.routes).toPromise();
}
在应用初始化时调用此方法:
@Injectable()
export class ParserInitializer {
parser: LocalizeParser;
routes: Routes;
/**
* CTOR
* @param injector
*/
constructor(private injector: Injector) {
}
/**
* @returns {Promise<any>}
*/
appInitializer(): Promise<any> {
const res = this.parser.init(this.routes);
res.then(() => {
let router = this.injector.get(Router);
router.resetConfig(this.parser.routes);
});
return res;
}
/**
* @param parser
* @param routes
* @returns {()=>Promise<any>}
*/
generateInitializer(parser: LocalizeParser, routes: Routes[]): () => Promise<any> {
this.parser = parser;
this.routes = routes.reduce((a, b) => a.concat(b));
return this.appInitializer;
}
}
/**
* @param p
* @param parser
* @param routes
* @returns {any}
*/
export function getAppInitializer(p: ParserInitializer, parser: LocalizeParser, routes: Routes[]): any {
return p.generateInitializer(parser, routes).bind(p);
}
@NgModule({
imports: [CommonModule, RouterModule, TranslateModule],
declarations: [],
exports: []
})
export class LocalizeRouterModule {
static forRoot(routes: Routes, config: LocalizeRouterConfig = {}): ModuleWithProviders {
return {
ngModule: LocalizeRouterModule,
providers: [
{
provide: RAW_ROUTES,
multi: true,
useValue: routes
},
config.parser,
// LocalizeParser,
ParserInitializer,
{
provide: APP_INITIALIZER,
multi: true,
useFactory: getAppInitializer,
deps: [ParserInitializer, LocalizeParser, RAW_ROUTES]
}
]
};
}
}
由于阿拉伯语要求版式方向为从右到左,因此我使用RTL Boostrap support来执行此操作。我将这个rtl css的作用域放在.rtl
css类中,并使用angular指令在选择阿拉伯语时将此css类设置为顶级。
@Directive({
selector: '[yfLayoutClass]'
})
export class LayoutClassDirective implements OnInit {
constructor(private elRef: ElementRef,
private renderer: Renderer2,
private store: Store<fromRoot.State>) {
}
ngOnInit(): void {
this.store.select(fromRoot.getLocale)
.filter(loc => loc != null)
.subscribe(locale => {
if (locale.isArabic()) {
this.renderer.addClass(this.elRef.nativeElement, 'rtl');
} else {
this.renderer.removeClass(this.elRef.nativeElement, 'rtl');
}
});
}
}
语言更改时,必须将用户重定向到正确的带前缀的路由。为了动态地做到这一点,我在appComponent
public ngOnInit(): void {
this.translateService.onLangChange
.combineLatest(this.router.events)
.subscribe(([langEvent, event]) => {
if (event instanceof RoutesRecognized) {
let currentUrl = event.url;
let locale = Locale.getLocaleByShortcut(langEvent.lang);
let queryParams = event.state.root.queryParams;
if (locale) {
if (locale.isArabic()) {
if (!ContextUtils.isArabicUrl(currentUrl)) {
this.router.navigateByUrl(ContextUtils.arabizeUrl(currentUrl), {queryParams: queryParams});
}
} else {
if (ContextUtils.isArabicUrl(currentUrl)) {
this.router.navigateByUrl(ContextUtils.frenchifyUrl(currentUrl), {queryParams: queryParams});
}
}
}
}
});
}
仅此而已!像这样,您只使用一个组件。
希望有帮助!