@hxui/angular
Version:
An Angular library based on the [HXUI design system](https://hxui.io).
155 lines • 24.1 kB
JavaScript
// todo: add delay support
// todo: merge events onShow, onShown, etc...
// todo: add global positioning configuration?
import { EventEmitter, ReflectiveInjector, TemplateRef } from '@angular/core';
import { listenToTriggers } from '../utils/triggers';
import { ContentRef } from './content-ref.class';
export class ComponentLoader {
/**
* Do not use this directly, it should be instanced via
* `ComponentLoadFactory.attach`
* @internal
* @param _viewContainerRef
* @param _elementRef
* @param _injector
* @param _renderer
* @param _componentFactoryResolver
* @param _ngZone
* @param _posService
*/
// eslint-disable-next-line
constructor(_viewContainerRef, _renderer, _elementRef, _injector, _componentFactoryResolver, _ngZone, _posService) {
this.onBeforeShow = new EventEmitter();
this.onShown = new EventEmitter();
this.onBeforeHide = new EventEmitter();
this.onHidden = new EventEmitter();
this._providers = [];
this._ngZone = _ngZone;
this._injector = _injector;
this._renderer = _renderer;
this._elementRef = _elementRef;
this._posService = _posService;
this._viewContainerRef = _viewContainerRef;
this._componentFactoryResolver = _componentFactoryResolver;
}
get isShown() {
return !!this._componentRef;
}
attach(compType) {
this._componentFactory =
this._componentFactoryResolver.resolveComponentFactory(compType);
return this;
}
// todo: add behaviour: to target element, `body`, custom element
to(container) {
this.container = container || this.container;
return this;
}
position(opts) {
this.attachment = opts.attachment || this.attachment;
this._elementRef = opts.target || this._elementRef;
return this;
}
provide(provider) {
this._providers.push(provider);
return this;
}
show(opts = {}) {
this._subscribePositioning();
if (!this._componentRef) {
this.onBeforeShow.emit();
this._contentRef = this._getContentRef(opts.content);
const injector = ReflectiveInjector.resolveAndCreate(this._providers, this._injector);
this._componentRef = this._viewContainerRef.createComponent(this._componentFactory, 0, injector, this._contentRef.nodes);
this.instance = this._componentRef.instance;
Object.assign(this._componentRef.instance, opts);
if (this.container === 'body' && typeof document !== 'undefined') {
document
.querySelector(this.container)
.appendChild(this._componentRef.location.nativeElement);
}
// we need to manually invoke change detection since events registered
// via
// Renderer::listen() are not picked up by change detection with the
// OnPush strategy
this._componentRef.changeDetectorRef.markForCheck();
this.onShown.emit(this._componentRef.instance);
}
return this._componentRef;
}
hide() {
if (this._componentRef) {
this.onBeforeHide.emit(this._componentRef.instance);
this._viewContainerRef.remove(this._viewContainerRef.indexOf(this._componentRef.hostView));
this._componentRef = null;
if (this._contentRef.viewRef) {
this._viewContainerRef.remove(this._viewContainerRef.indexOf(this._contentRef.viewRef));
this._contentRef = null;
}
this._componentRef = null;
this.onHidden.emit();
}
return this;
}
toggle() {
if (this.isShown) {
this.hide();
return;
}
this.show();
}
dispose() {
if (this.isShown) {
this.hide();
}
this._unsubscribePositioning();
if (this._unregisterListenersFn) {
this._unregisterListenersFn();
}
}
listen(listenOpts) {
this.triggers = listenOpts.triggers || this.triggers;
listenOpts.target = listenOpts.target || this._elementRef;
listenOpts.show = listenOpts.show || (() => this.show());
listenOpts.hide = listenOpts.hide || (() => this.hide());
listenOpts.toggle =
listenOpts.toggle ||
(() => (this.isShown ? listenOpts.hide() : listenOpts.show()));
this._unregisterListenersFn = listenToTriggers(this._renderer, listenOpts.target.nativeElement, this.triggers, listenOpts.show, listenOpts.hide, listenOpts.toggle);
return this;
}
_subscribePositioning() {
if (this._zoneSubscription || !this.attachment) {
return;
}
this._zoneSubscription = this._ngZone.onStable.subscribe(() => {
if (!this._componentRef) {
return;
}
this._posService.position({
element: this._componentRef.location,
target: this._elementRef,
attachment: this.attachment,
appendToBody: this.container === 'body'
});
});
}
_unsubscribePositioning() {
if (!this._zoneSubscription) {
return;
}
this._zoneSubscription.unsubscribe();
this._zoneSubscription = null;
}
_getContentRef(content) {
if (!content) {
return new ContentRef([]);
}
if (content instanceof TemplateRef) {
const viewRef = this._viewContainerRef.createEmbeddedView(content);
return new ContentRef([viewRef.rootNodes], viewRef);
}
return new ContentRef([[this._renderer.createText(`${content}`)]]);
}
}
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todo: add delay support\r\n// todo: merge events onShow, onShown, etc...\r\n// todo: add global positioning configuration?\r\nimport {\r\n  ComponentFactory,\r\n  ComponentFactoryResolver,\r\n  ComponentRef,\r\n  ElementRef,\r\n  EventEmitter,\r\n  Injector,\r\n  NgZone,\r\n  Provider,\r\n  ReflectiveInjector,\r\n  Renderer2,\r\n  TemplateRef,\r\n  Type,\r\n  ViewContainerRef\r\n} from '@angular/core';\r\nimport { PositioningOptions } from '../positioning/positioning.options';\r\nimport { PositioningService } from '../positioning/positioning.service';\r\nimport { listenToTriggers } from '../utils/triggers';\r\nimport { ContentRef } from './content-ref.class';\r\n\r\nexport interface ListenOptions {\r\n  target?: ElementRef;\r\n  triggers?: string;\r\n  show?: any;\r\n  hide?: any;\r\n  toggle?: any;\r\n}\r\n\r\nexport class ComponentLoader<T> {\r\n  public onBeforeShow: EventEmitter<any> = new EventEmitter();\r\n  public onShown: EventEmitter<any> = new EventEmitter();\r\n  public onBeforeHide: EventEmitter<any> = new EventEmitter();\r\n  public onHidden: EventEmitter<any> = new EventEmitter();\r\n\r\n  public instance: T;\r\n  public _componentRef: ComponentRef<T>;\r\n\r\n  private _providers: Provider[] = [];\r\n  private _componentFactory: ComponentFactory<T>;\r\n  private _elementRef: ElementRef;\r\n  private _zoneSubscription: any;\r\n  private _contentRef: ContentRef;\r\n  private _viewContainerRef: ViewContainerRef;\r\n  private _injector: Injector;\r\n  private _renderer: Renderer2;\r\n  private _ngZone: NgZone;\r\n  private _componentFactoryResolver: ComponentFactoryResolver;\r\n  private _posService: PositioningService;\r\n\r\n  // eslint-disable-next-line @typescript-eslint/ban-types\r\n  private _unregisterListenersFn: Function;\r\n\r\n  public get isShown(): boolean {\r\n    return !!this._componentRef;\r\n  }\r\n\r\n  /**\r\n   * Placement of a component. Accepts: \"top\", \"bottom\", \"left\", \"right\"\r\n   */\r\n  private attachment: string;\r\n\r\n  /**\r\n   * A selector specifying the element the popover should be appended to.\r\n   * Currently only supports \"body\".\r\n   */\r\n  private container: string | ElementRef | any;\r\n\r\n  /**\r\n   * Specifies events that should trigger. Supports a space separated list of\r\n   * event names.\r\n   */\r\n  private triggers: string;\r\n\r\n  /**\r\n   * Do not use this directly, it should be instanced via\r\n   * `ComponentLoadFactory.attach`\r\n   * @internal\r\n   * @param _viewContainerRef\r\n   * @param _elementRef\r\n   * @param _injector\r\n   * @param _renderer\r\n   * @param _componentFactoryResolver\r\n   * @param _ngZone\r\n   * @param _posService\r\n   */\r\n  // eslint-disable-next-line\r\n  public constructor(\r\n    _viewContainerRef: ViewContainerRef,\r\n    _renderer: Renderer2,\r\n    _elementRef: ElementRef,\r\n    _injector: Injector,\r\n    _componentFactoryResolver: ComponentFactoryResolver,\r\n    _ngZone: NgZone,\r\n    _posService: PositioningService\r\n  ) {\r\n    this._ngZone = _ngZone;\r\n    this._injector = _injector;\r\n    this._renderer = _renderer;\r\n    this._elementRef = _elementRef;\r\n    this._posService = _posService;\r\n    this._viewContainerRef = _viewContainerRef;\r\n    this._componentFactoryResolver = _componentFactoryResolver;\r\n  }\r\n\r\n  public attach(compType: Type<T>): ComponentLoader<T> {\r\n    this._componentFactory =\r\n      this._componentFactoryResolver.resolveComponentFactory<T>(compType);\r\n    return this;\r\n  }\r\n\r\n  // todo: add behaviour: to target element, `body`, custom element\r\n  public to(container?: string): ComponentLoader<T> {\r\n    this.container = container || this.container;\r\n    return this;\r\n  }\r\n\r\n  public position(opts?: PositioningOptions): ComponentLoader<T> {\r\n    this.attachment = opts.attachment || this.attachment;\r\n    this._elementRef = (opts.target as ElementRef) || this._elementRef;\r\n    return this;\r\n  }\r\n\r\n  public provide(provider: Provider): ComponentLoader<T> {\r\n    this._providers.push(provider);\r\n    return this;\r\n  }\r\n\r\n  public show(\r\n    opts: { content?: string | TemplateRef<any>; [key: string]: any } = {}\r\n  ): ComponentRef<T> {\r\n    this._subscribePositioning();\r\n\r\n    if (!this._componentRef) {\r\n      this.onBeforeShow.emit();\r\n      this._contentRef = this._getContentRef(opts.content);\r\n      const injector = ReflectiveInjector.resolveAndCreate(\r\n        this._providers,\r\n        this._injector\r\n      );\r\n      this._componentRef = this._viewContainerRef.createComponent(\r\n        this._componentFactory,\r\n        0,\r\n        injector,\r\n        this._contentRef.nodes\r\n      );\r\n      this.instance = this._componentRef.instance;\r\n\r\n      Object.assign(this._componentRef.instance, opts);\r\n\r\n      if (this.container === 'body' && typeof document !== 'undefined') {\r\n        document\r\n          .querySelector(this.container as string)\r\n          .appendChild(this._componentRef.location.nativeElement);\r\n      }\r\n\r\n      // we need to manually invoke change detection since events registered\r\n      // via\r\n      // Renderer::listen() are not picked up by change detection with the\r\n      // OnPush strategy\r\n      this._componentRef.changeDetectorRef.markForCheck();\r\n      this.onShown.emit(this._componentRef.instance);\r\n    }\r\n    return this._componentRef;\r\n  }\r\n\r\n  public hide(): ComponentLoader<T> {\r\n    if (this._componentRef) {\r\n      this.onBeforeHide.emit(this._componentRef.instance);\r\n      this._viewContainerRef.remove(\r\n        this._viewContainerRef.indexOf(this._componentRef.hostView)\r\n      );\r\n      this._componentRef = null;\r\n\r\n      if (this._contentRef.viewRef) {\r\n        this._viewContainerRef.remove(\r\n          this._viewContainerRef.indexOf(this._contentRef.viewRef)\r\n        );\r\n        this._contentRef = null;\r\n      }\r\n\r\n      this._componentRef = null;\r\n      this.onHidden.emit();\r\n    }\r\n    return this;\r\n  }\r\n\r\n  public toggle(): void {\r\n    if (this.isShown) {\r\n      this.hide();\r\n      return;\r\n    }\r\n\r\n    this.show();\r\n  }\r\n\r\n  public dispose(): void {\r\n    if (this.isShown) {\r\n      this.hide();\r\n    }\r\n\r\n    this._unsubscribePositioning();\r\n\r\n    if (this._unregisterListenersFn) {\r\n      this._unregisterListenersFn();\r\n    }\r\n  }\r\n\r\n  public listen(listenOpts: ListenOptions): ComponentLoader<T> {\r\n    this.triggers = listenOpts.triggers || this.triggers;\r\n\r\n    listenOpts.target = listenOpts.target || this._elementRef;\r\n    listenOpts.show = listenOpts.show || (() => this.show());\r\n    listenOpts.hide = listenOpts.hide || (() => this.hide());\r\n    listenOpts.toggle =\r\n      listenOpts.toggle ||\r\n      (() => (this.isShown ? listenOpts.hide() : listenOpts.show()));\r\n\r\n    this._unregisterListenersFn = listenToTriggers(\r\n      this._renderer,\r\n      listenOpts.target.nativeElement,\r\n      this.triggers,\r\n      listenOpts.show,\r\n      listenOpts.hide,\r\n      listenOpts.toggle\r\n    );\r\n\r\n    return this;\r\n  }\r\n\r\n  private _subscribePositioning(): void {\r\n    if (this._zoneSubscription || !this.attachment) {\r\n      return;\r\n    }\r\n\r\n    this._zoneSubscription = this._ngZone.onStable.subscribe(() => {\r\n      if (!this._componentRef) {\r\n        return;\r\n      }\r\n      this._posService.position({\r\n        element: this._componentRef.location,\r\n        target: this._elementRef,\r\n        attachment: this.attachment,\r\n        appendToBody: this.container === 'body'\r\n      });\r\n    });\r\n  }\r\n\r\n  private _unsubscribePositioning(): void {\r\n    if (!this._zoneSubscription) {\r\n      return;\r\n    }\r\n    this._zoneSubscription.unsubscribe();\r\n    this._zoneSubscription = null;\r\n  }\r\n\r\n  private _getContentRef(content: string | TemplateRef<any>): ContentRef {\r\n    if (!content) {\r\n      return new ContentRef([]);\r\n    }\r\n\r\n    if (content instanceof TemplateRef) {\r\n      const viewRef =\r\n        this._viewContainerRef.createEmbeddedView<TemplateRef<T>>(content);\r\n      return new ContentRef([viewRef.rootNodes], viewRef);\r\n    }\r\n\r\n    return new ContentRef([[this._renderer.createText(`${content}`)]]);\r\n  }\r\n}\r\n"]}