@angular/material
Version:
Angular Material
92 lines • 11.6 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 { 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';
/**
* 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
if (this._changeDetectorRef) {
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();
}
}
}
MatMenuContent.decorators = [
{ type: Directive, args: [{
selector: 'ng-template[matMenuContent]',
providers: [{ provide: MAT_MENU_CONTENT, useExisting: MatMenuContent }],
},] }
];
MatMenuContent.ctorParameters = () => [
{ type: TemplateRef },
{ type: ComponentFactoryResolver },
{ type: ApplicationRef },
{ type: Injector },
{ type: ViewContainerRef },
{ type: undefined, decorators: [{ type: Inject, args: [DOCUMENT,] }] },
{ type: ChangeDetectorRef }
];
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