@angular/material
Version:
Angular Material
86 lines • 13.2 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 { DomPortalOutlet, TemplatePortal } from '@angular/cdk/portal';
import { DOCUMENT } from '@angular/common';
import { ApplicationRef, ChangeDetectorRef, ComponentFactoryResolver, Directive, Inject, InjectionToken, Injector, TemplateRef, ViewContainerRef, } from '@angular/core';
import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
/**
* Injection token that can be used to reference instances of `MatMenuContent`. It serves
* as alternative token to the actual `MatMenuContent` class which could cause unnecessary
* retention of the class and its directive metadata.
*/
export const MAT_MENU_CONTENT = new InjectionToken('MatMenuContent');
/** Menu content that will be rendered lazily once the menu is opened. */
export class MatMenuContent {
constructor(_template, _componentFactoryResolver, _appRef, _injector, _viewContainerRef, _document, _changeDetectorRef) {
this._template = _template;
this._componentFactoryResolver = _componentFactoryResolver;
this._appRef = _appRef;
this._injector = _injector;
this._viewContainerRef = _viewContainerRef;
this._document = _document;
this._changeDetectorRef = _changeDetectorRef;
/** Emits when the menu content has been attached. */
this._attached = new Subject();
}
/**
* Attaches the content with a particular context.
* @docs-private
*/
attach(context = {}) {
if (!this._portal) {
this._portal = new TemplatePortal(this._template, this._viewContainerRef);
}
this.detach();
if (!this._outlet) {
this._outlet = new DomPortalOutlet(this._document.createElement('div'), this._componentFactoryResolver, this._appRef, this._injector);
}
const element = this._template.elementRef.nativeElement;
// Because we support opening the same menu from different triggers (which in turn have their
// own `OverlayRef` panel), we have to re-insert the host element every time, otherwise we
// risk it staying attached to a pane that's no longer in the DOM.
element.parentNode.insertBefore(this._outlet.outletElement, element);
// When `MatMenuContent` is used in an `OnPush` component, the insertion of the menu
// content via `createEmbeddedView` does not cause the content to be seen as "dirty"
// by Angular. This causes the `@ContentChildren` for menu items within the menu to
// not be updated by Angular. By explicitly marking for check here, we tell Angular that
// it needs to check for new menu items and update the `@ContentChild` in `MatMenu`.
// @breaking-change 9.0.0 Make change detector ref required
this._changeDetectorRef?.markForCheck();
this._portal.attach(this._outlet, context);
this._attached.next();
}
/**
* Detaches the content.
* @docs-private
*/
detach() {
if (this._portal.isAttached) {
this._portal.detach();
}
}
ngOnDestroy() {
if (this._outlet) {
this._outlet.dispose();
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.0.0", ngImport: i0, type: MatMenuContent, deps: [{ token: i0.TemplateRef }, { token: i0.ComponentFactoryResolver }, { token: i0.ApplicationRef }, { token: i0.Injector }, { token: i0.ViewContainerRef }, { token: DOCUMENT }, { token: i0.ChangeDetectorRef }], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "17.0.0", type: MatMenuContent, selector: "ng-template[matMenuContent]", providers: [{ provide: MAT_MENU_CONTENT, useExisting: MatMenuContent }], ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.0.0", ngImport: i0, type: MatMenuContent, decorators: [{
type: Directive,
args: [{
selector: 'ng-template[matMenuContent]',
providers: [{ provide: MAT_MENU_CONTENT, useExisting: MatMenuContent }],
}]
}], ctorParameters: () => [{ type: i0.TemplateRef }, { type: i0.ComponentFactoryResolver }, { type: i0.ApplicationRef }, { type: i0.Injector }, { type: i0.ViewContainerRef }, { type: undefined, decorators: [{
type: Inject,
args: [DOCUMENT]
}] }, { type: i0.ChangeDetectorRef }] });
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It serves\n * as alternative token to the actual `MatMenuContent` class which could cause unnecessary\n * retention of the class and its directive metadata.\n */\nexport const MAT_MENU_CONTENT = new InjectionToken<MatMenuContent>('MatMenuContent');\n\n/** Menu content that will be rendered lazily once the menu is opened. */\n@Directive({\n  selector: 'ng-template[matMenuContent]',\n  providers: [{provide: MAT_MENU_CONTENT, useExisting: MatMenuContent}],\n})\nexport class MatMenuContent implements OnDestroy {\n  private _portal: TemplatePortal<any>;\n  private _outlet: DomPortalOutlet;\n\n  /** Emits when the menu content has been attached. */\n  readonly _attached = new Subject<void>();\n\n  constructor(\n    template: TemplateRef<any>,\n    componentFactoryResolver: ComponentFactoryResolver,\n    appRef: ApplicationRef,\n    injector: Injector,\n    viewContainerRef: ViewContainerRef,\n    document: any,\n    changeDetectorRef: ChangeDetectorRef,\n  );\n\n  /**\n   * @deprecated `changeDetectorRef` is now a required parameter.\n   * @breaking-change 9.0.0\n   */\n  constructor(\n    template: TemplateRef<any>,\n    componentFactoryResolver: ComponentFactoryResolver,\n    appRef: ApplicationRef,\n    injector: Injector,\n    viewContainerRef: ViewContainerRef,\n    document: any,\n    changeDetectorRef?: ChangeDetectorRef,\n  );\n\n  constructor(\n    private _template: TemplateRef<any>,\n    private _componentFactoryResolver: ComponentFactoryResolver,\n    private _appRef: ApplicationRef,\n    private _injector: Injector,\n    private _viewContainerRef: ViewContainerRef,\n    @Inject(DOCUMENT) private _document: any,\n    private _changeDetectorRef?: ChangeDetectorRef,\n  ) {}\n\n  /**\n   * Attaches the content with a particular context.\n   * @docs-private\n   */\n  attach(context: any = {}) {\n    if (!this._portal) {\n      this._portal = new TemplatePortal(this._template, this._viewContainerRef);\n    }\n\n    this.detach();\n\n    if (!this._outlet) {\n      this._outlet = new DomPortalOutlet(\n        this._document.createElement('div'),\n        this._componentFactoryResolver,\n        this._appRef,\n        this._injector,\n      );\n    }\n\n    const element: HTMLElement = this._template.elementRef.nativeElement;\n\n    // Because we support opening the same menu from different triggers (which in turn have their\n    // own `OverlayRef` panel), we have to re-insert the host element every time, otherwise we\n    // risk it staying attached to a pane that's no longer in the DOM.\n    element.parentNode!.insertBefore(this._outlet.outletElement, element);\n\n    // When `MatMenuContent` is used in an `OnPush` component, the insertion of the menu\n    // content via `createEmbeddedView` does not cause the content to be seen as \"dirty\"\n    // by Angular. This causes the `@ContentChildren` for menu items within the menu to\n    // not be updated by Angular. By explicitly marking for check here, we tell Angular that\n    // it needs to check for new menu items and update the `@ContentChild` in `MatMenu`.\n    // @breaking-change 9.0.0 Make change detector ref required\n    this._changeDetectorRef?.markForCheck();\n    this._portal.attach(this._outlet, context);\n    this._attached.next();\n  }\n\n  /**\n   * Detaches the content.\n   * @docs-private\n   */\n  detach() {\n    if (this._portal.isAttached) {\n      this._portal.detach();\n    }\n  }\n\n  ngOnDestroy() {\n    if (this._outlet) {\n      this._outlet.dispose();\n    }\n  }\n}\n"]}