/**
 * @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, Input, ViewContainerRef } from '@angular/core';
import * as i0 from "@angular/core";
/**
 * @ngModule CommonModule
 *
 * @description
 *
 * Inserts an embedded view from a prepared `TemplateRef`.
 *
 * You can attach a context object to the `EmbeddedViewRef` by setting `[ngTemplateOutletContext]`.
 * `[ngTemplateOutletContext]` should be an object, the object's keys will be available for binding
 * by the local template `let` declarations.
 *
 * @usageNotes
 * ```
 * <ng-container *ngTemplateOutlet="templateRefExp; context: contextExp"></ng-container>
 * ```
 *
 * Using the key `$implicit` in the context object will set its value as default.
 *
 * ### Example
 *
 * {@example common/ngTemplateOutlet/ts/module.ts region='NgTemplateOutlet'}
 *
 * @publicApi
 */
export class NgTemplateOutlet {
    constructor(_viewContainerRef) {
        this._viewContainerRef = _viewContainerRef;
        this._viewRef = null;
        /**
         * A context object to attach to the {@link EmbeddedViewRef}. This should be an
         * object, the object's keys will be available for binding by the local template `let`
         * declarations.
         * Using the key `$implicit` in the context object will set its value as default.
         */
        this.ngTemplateOutletContext = null;
        /**
         * A string defining the template reference and optionally the context object for the template.
         */
        this.ngTemplateOutlet = null;
        /** Injector to be used within the embedded view. */
        this.ngTemplateOutletInjector = null;
    }
    /** @nodoc */
    ngOnChanges(changes) {
        if (changes['ngTemplateOutlet'] || changes['ngTemplateOutletInjector']) {
            const viewContainerRef = this._viewContainerRef;
            if (this._viewRef) {
                viewContainerRef.remove(viewContainerRef.indexOf(this._viewRef));
            }
            if (this.ngTemplateOutlet) {
                const { ngTemplateOutlet: template, ngTemplateOutletContext: context, ngTemplateOutletInjector: injector } = this;
                this._viewRef = viewContainerRef.createEmbeddedView(template, context, injector ? { injector } : undefined);
            }
            else {
                this._viewRef = null;
            }
        }
        else if (this._viewRef && changes['ngTemplateOutletContext'] && this.ngTemplateOutletContext) {
            this._viewRef.context = this.ngTemplateOutletContext;
        }
    }
}
NgTemplateOutlet.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.2.8", ngImport: i0, type: NgTemplateOutlet, deps: [{ token: i0.ViewContainerRef }], target: i0.ɵɵFactoryTarget.Directive });
NgTemplateOutlet.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "14.2.8", type: NgTemplateOutlet, isStandalone: true, selector: "[ngTemplateOutlet]", inputs: { ngTemplateOutletContext: "ngTemplateOutletContext", ngTemplateOutlet: "ngTemplateOutlet", ngTemplateOutletInjector: "ngTemplateOutletInjector" }, usesOnChanges: true, ngImport: i0 });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.2.8", ngImport: i0, type: NgTemplateOutlet, decorators: [{
            type: Directive,
            args: [{
                    selector: '[ngTemplateOutlet]',
                    standalone: true,
                }]
        }], ctorParameters: function () { return [{ type: i0.ViewContainerRef }]; }, propDecorators: { ngTemplateOutletContext: [{
                type: Input
            }], ngTemplateOutlet: [{
                type: Input
            }], ngTemplateOutletInjector: [{
                type: Input
            }] } });
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