abstract_form_group_directive.ts
/**
* @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 {Directive, OnDestroy, OnInit} from '@angular/core';
import {FormGroup} from '../model/form_group';
import {ControlContainer} from './control_container';
import {Form} from './form_interface';
import {controlPath} from './shared';
/**
* @description
* A base class for code shared between the `NgModelGroup` and `FormGroupName` directives.
*
* @publicApi
*/
@Directive()
export class AbstractFormGroupDirective extends ControlContainer implements OnInit, OnDestroy {
/**
* @description
* The parent control for the group
*
* @internal
*/
// TODO(issue/24571): remove '!'.
_parent!: ControlContainer;
/** @nodoc */
ngOnInit(): void {
this._checkParentType();
// Register the group with its parent group.
this.formDirective!.addFormGroup(this);
}
/** @nodoc */
ngOnDestroy(): void {
if (this.formDirective) {
// Remove the group from its parent group.
this.formDirective.removeFormGroup(this);
}
}
/**
* @description
* The `FormGroup` bound to this directive.
*/
override get control(): FormGroup {
return this.formDirective!.getFormGroup(this);
}
/**
* @description
* The path to this group from the top-level directive.
*/
override get path(): string[] {
return controlPath(this.name == null ? this.name : this.name.toString(), this._parent);
}
/**
* @description
* The top-level directive for this group if present, otherwise null.
*/
override get formDirective(): Form|null {
return this._parent ? this._parent.formDirective : null;
}
/** @internal */
_checkParentType(): void {}
}