@angular/common
Version:
Angular - commonly needed directives and services
133 lines • 14.6 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { createNgModule, Directive, Injector, Input, NgModuleFactory, NgModuleRef, Type, ViewContainerRef } from '@angular/core';
import * as i0 from "@angular/core";
/**
* Instantiates a {@link Component} type and inserts its Host View into the current View.
* `NgComponentOutlet` provides a declarative approach for dynamic component creation.
*
* `NgComponentOutlet` requires a component type, if a falsy value is set the view will clear and
* any existing component will be destroyed.
*
* @usageNotes
*
* ### Fine tune control
*
* You can control the component creation process by using the following optional attributes:
*
* * `ngComponentOutletInjector`: Optional custom {@link Injector} that will be used as parent for
* the Component. Defaults to the injector of the current view container.
*
* * `ngComponentOutletContent`: Optional list of projectable nodes to insert into the content
* section of the component, if it exists.
*
* * `ngComponentOutletNgModule`: Optional NgModule class reference to allow loading another
* module dynamically, then loading a component from that module.
*
* * `ngComponentOutletNgModuleFactory`: Deprecated config option that allows providing optional
* NgModule factory to allow loading another module dynamically, then loading a component from that
* module. Use `ngComponentOutletNgModule` instead.
*
* ### Syntax
*
* Simple
* ```
* <ng-container *ngComponentOutlet="componentTypeExpression"></ng-container>
* ```
*
* Customized injector/content
* ```
* <ng-container *ngComponentOutlet="componentTypeExpression;
* injector: injectorExpression;
* content: contentNodesExpression;">
* </ng-container>
* ```
*
* Customized NgModule reference
* ```
* <ng-container *ngComponentOutlet="componentTypeExpression;
* ngModule: ngModuleClass;">
* </ng-container>
* ```
*
* ### A simple example
*
* {@example common/ngComponentOutlet/ts/module.ts region='SimpleExample'}
*
* A more complete example with additional options:
*
* {@example common/ngComponentOutlet/ts/module.ts region='CompleteExample'}
*
* @publicApi
* @ngModule CommonModule
*/
class NgComponentOutlet {
constructor(_viewContainerRef) {
this._viewContainerRef = _viewContainerRef;
this.ngComponentOutlet = null;
}
/** @nodoc */
ngOnChanges(changes) {
const { _viewContainerRef: viewContainerRef, ngComponentOutletNgModule: ngModule, ngComponentOutletNgModuleFactory: ngModuleFactory, } = this;
viewContainerRef.clear();
this._componentRef = undefined;
if (this.ngComponentOutlet) {
const injector = this.ngComponentOutletInjector || viewContainerRef.parentInjector;
if (changes['ngComponentOutletNgModule'] || changes['ngComponentOutletNgModuleFactory']) {
if (this._moduleRef)
this._moduleRef.destroy();
if (ngModule) {
this._moduleRef = createNgModule(ngModule, getParentInjector(injector));
}
else if (ngModuleFactory) {
this._moduleRef = ngModuleFactory.create(getParentInjector(injector));
}
else {
this._moduleRef = undefined;
}
}
this._componentRef = viewContainerRef.createComponent(this.ngComponentOutlet, {
index: viewContainerRef.length,
injector,
ngModuleRef: this._moduleRef,
projectableNodes: this.ngComponentOutletContent,
});
}
}
/** @nodoc */
ngOnDestroy() {
if (this._moduleRef)
this._moduleRef.destroy();
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.0.3", ngImport: i0, type: NgComponentOutlet, deps: [{ token: i0.ViewContainerRef }], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "16.0.3", type: NgComponentOutlet, isStandalone: true, selector: "[ngComponentOutlet]", inputs: { ngComponentOutlet: "ngComponentOutlet", ngComponentOutletInjector: "ngComponentOutletInjector", ngComponentOutletContent: "ngComponentOutletContent", ngComponentOutletNgModule: "ngComponentOutletNgModule", ngComponentOutletNgModuleFactory: "ngComponentOutletNgModuleFactory" }, usesOnChanges: true, ngImport: i0 }); }
}
export { NgComponentOutlet };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.0.3", ngImport: i0, type: NgComponentOutlet, decorators: [{
type: Directive,
args: [{
selector: '[ngComponentOutlet]',
standalone: true,
}]
}], ctorParameters: function () { return [{ type: i0.ViewContainerRef }]; }, propDecorators: { ngComponentOutlet: [{
type: Input
}], ngComponentOutletInjector: [{
type: Input
}], ngComponentOutletContent: [{
type: Input
}], ngComponentOutletNgModule: [{
type: Input
}], ngComponentOutletNgModuleFactory: [{
type: Input
}] } });
// Helper function that returns an Injector instance of a parent NgModule.
function getParentInjector(injector) {
const parentNgModule = injector.get(NgModuleRef);
return parentNgModule.injector;
}
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Defaults to the injector of the current view container.\n *\n * * `ngComponentOutletContent`: Optional list of projectable nodes to insert into the content\n * section of the component, if it exists.\n *\n * * `ngComponentOutletNgModule`: Optional NgModule class reference to allow loading another\n * module dynamically, then loading a component from that module.\n *\n * * `ngComponentOutletNgModuleFactory`: Deprecated config option that allows providing optional\n * NgModule factory to allow loading another module dynamically, then loading a component from that\n * module. Use `ngComponentOutletNgModule` instead.\n *\n * ### Syntax\n *\n * Simple\n * ```\n * <ng-container *ngComponentOutlet=\"componentTypeExpression\"></ng-container>\n * ```\n *\n * Customized injector/content\n * ```\n * <ng-container *ngComponentOutlet=\"componentTypeExpression;\n *                                   injector: injectorExpression;\n *                                   content: contentNodesExpression;\">\n * </ng-container>\n * ```\n *\n * Customized NgModule reference\n * ```\n * <ng-container *ngComponentOutlet=\"componentTypeExpression;\n *                                   ngModule: ngModuleClass;\">\n * </ng-container>\n * ```\n *\n * ### A simple example\n *\n * {@example common/ngComponentOutlet/ts/module.ts region='SimpleExample'}\n *\n * A more complete example with additional options:\n *\n * {@example common/ngComponentOutlet/ts/module.ts region='CompleteExample'}\n *\n * @publicApi\n * @ngModule CommonModule\n */\n@Directive({\n  selector: '[ngComponentOutlet]',\n  standalone: true,\n})\nexport class NgComponentOutlet implements OnChanges, OnDestroy {\n  @Input() ngComponentOutlet: Type<any>|null = null;\n\n  @Input() ngComponentOutletInjector?: Injector;\n  @Input() ngComponentOutletContent?: any[][];\n\n  @Input() ngComponentOutletNgModule?: Type<any>;\n  /**\n   * @deprecated This input is deprecated, use `ngComponentOutletNgModule` instead.\n   */\n  @Input() ngComponentOutletNgModuleFactory?: NgModuleFactory<any>;\n\n  private _componentRef: ComponentRef<any>|undefined;\n  private _moduleRef: NgModuleRef<any>|undefined;\n\n  constructor(private _viewContainerRef: ViewContainerRef) {}\n\n  /** @nodoc */\n  ngOnChanges(changes: SimpleChanges) {\n    const {\n      _viewContainerRef: viewContainerRef,\n      ngComponentOutletNgModule: ngModule,\n      ngComponentOutletNgModuleFactory: ngModuleFactory,\n    } = this;\n    viewContainerRef.clear();\n    this._componentRef = undefined;\n\n    if (this.ngComponentOutlet) {\n      const injector = this.ngComponentOutletInjector || viewContainerRef.parentInjector;\n\n      if (changes['ngComponentOutletNgModule'] || changes['ngComponentOutletNgModuleFactory']) {\n        if (this._moduleRef) this._moduleRef.destroy();\n\n        if (ngModule) {\n          this._moduleRef = createNgModule(ngModule, getParentInjector(injector));\n        } else if (ngModuleFactory) {\n          this._moduleRef = ngModuleFactory.create(getParentInjector(injector));\n        } else {\n          this._moduleRef = undefined;\n        }\n      }\n\n      this._componentRef = viewContainerRef.createComponent(this.ngComponentOutlet, {\n        index: viewContainerRef.length,\n        injector,\n        ngModuleRef: this._moduleRef,\n        projectableNodes: this.ngComponentOutletContent,\n      });\n    }\n  }\n\n  /** @nodoc */\n  ngOnDestroy() {\n    if (this._moduleRef) this._moduleRef.destroy();\n  }\n}\n\n// Helper function that returns an Injector instance of a parent NgModule.\nfunction getParentInjector(injector: Injector): Injector {\n  const parentNgModule = injector.get(NgModuleRef);\n  return parentNgModule.injector;\n}\n"]}