@angular/core/esm2020/src/linker/view_container_ref.mjs

import { isType } from '../interface/type';
import { assertNodeInjector } from '../render3/assert';
import { ComponentFactory as R3ComponentFactory } from '../render3/component_ref';
import { getComponentDef } from '../render3/definition';
import { getParentInjectorLocation, NodeInjector } from '../render3/di';
import { addToViewTree, createLContainer } from '../render3/instructions/shared';
import { CONTAINER_HEADER_OFFSET, NATIVE, VIEW_REFS } from '../render3/interfaces/container';
import { isLContainer } from '../render3/interfaces/type_checks';
import { PARENT, RENDERER, T_HOST, TVIEW } from '../render3/interfaces/view';
import { assertTNodeType } from '../render3/node_assert';
import { addViewToContainer, destroyLView, detachView, getBeforeNodeForView, insertView, nativeInsertBefore, nativeNextSibling, nativeParentNode } from '../render3/node_manipulation';
import { getCurrentTNode, getLView } from '../render3/state';
import { getParentInjectorIndex, getParentInjectorView, hasParentInjector } from '../render3/util/injector_utils';
import { getNativeByTNode, unwrapRNode, viewAttachedToContainer } from '../render3/util/view_utils';
import { ViewRef as R3ViewRef } from '../render3/view_ref';
import { addToArray, removeFromArray } from '../util/array_utils';
import { assertDefined, assertEqual, assertGreaterThan, assertLessThan } from '../util/assert';
import { noop } from '../util/noop';
import { createElementRef } from './element_ref';
import { NgModuleRef } from './ng_module_factory';
export const SWITCH_VIEW_CONTAINER_REF_FACTORY__POST_R3__ = injectViewContainerRef;
const SWITCH_VIEW_CONTAINER_REF_FACTORY__PRE_R3__ = noop;
const SWITCH_VIEW_CONTAINER_REF_FACTORY = SWITCH_VIEW_CONTAINER_REF_FACTORY__POST_R3__;
/**
 * Represents a container where one or more views can be attached to a component.
 *
 * Can contain *host views* (created by instantiating a
 * component with the `createComponent()` method), and *embedded views*
 * (created by instantiating a `TemplateRef` with the `createEmbeddedView()` method).
 *
 * A view container instance can contain other view containers,
 * creating a [view hierarchy](guide/glossary#view-tree).
 *
 * @see `ComponentRef`
 * @see `EmbeddedViewRef`
 *
 * @publicApi
 */
export class ViewContainerRef {
}
/**
 * @internal
 * @nocollapse
 */
ViewContainerRef.__NG_ELEMENT_ID__ = SWITCH_VIEW_CONTAINER_REF_FACTORY;
/**
 * Creates a ViewContainerRef and stores it on the injector. Or, if the ViewContainerRef
 * already exists, retrieves the existing ViewContainerRef.
 *
 * @returns The ViewContainerRef instance to use
 */
export function injectViewContainerRef() {
    const previousTNode = getCurrentTNode();
    return createContainerRef(previousTNode, getLView());
}
const VE_ViewContainerRef = ViewContainerRef;
const R3ViewContainerRef = class ViewContainerRef extends VE_ViewContainerRef {
    constructor(_lContainer, _hostTNode, _hostLView) {
        super();
        this._lContainer = _lContainer;
        this._hostTNode = _hostTNode;
        this._hostLView = _hostLView;
    }
    get element() {
        return createElementRef(this._hostTNode, this._hostLView);
    }
    get injector() {
        return new NodeInjector(this._hostTNode, this._hostLView);
    }
    /** @deprecated No replacement */
    get parentInjector() {
        const parentLocation = getParentInjectorLocation(this._hostTNode, this._hostLView);
        if (hasParentInjector(parentLocation)) {
            const parentView = getParentInjectorView(parentLocation, this._hostLView);
            const injectorIndex = getParentInjectorIndex(parentLocation);
            ngDevMode && assertNodeInjector(parentView, injectorIndex);
            const parentTNode = parentView[TVIEW].data[injectorIndex + 8 /* TNODE */];
            return new NodeInjector(parentTNode, parentView);
        }
        else {
            return new NodeInjector(null, this._hostLView);
        }
    }
    clear() {
        while (this.length > 0) {
            this.remove(this.length - 1);
        }
    }
    get(index) {
        const viewRefs = getViewRefs(this._lContainer);
        return viewRefs !== null && viewRefs[index] || null;
    }
    get length() {
        return this._lContainer.length - CONTAINER_HEADER_OFFSET;
    }
    createEmbeddedView(templateRef, context, index) {
        const viewRef = templateRef.createEmbeddedView(context || {});
        this.insert(viewRef, index);
        return viewRef;
    }
    createComponent(componentFactoryOrType, indexOrOptions, injector, projectableNodes, ngModuleRef) {
        const isComponentFactory = componentFactoryOrType && !isType(componentFactoryOrType);
        let index;
        // This function supports 2 signatures and we need to handle options correctly for both:
        //   1. When first argument is a Component type. This signature also requires extra
        //      options to be provided as as object (more ergonomic option).
        //   2. First argument is a Component factory. In this case extra options are represented as
        //      positional arguments. This signature is less ergonomic and will be deprecated.
        if (isComponentFactory) {
            if (ngDevMode) {
                assertEqual(typeof indexOrOptions !== 'object', true, 'It looks like Component factory was provided as the first argument ' +
                    'and an options object as the second argument. This combination of arguments ' +
                    'is incompatible. You can either change the first argument to provide Component ' +
                    'type or change the second argument to be a number (representing an index at ' +
                    'which to insert the new component\'s host view into this container)');
            }
            index = indexOrOptions;
        }
        else {
            if (ngDevMode) {
                assertDefined(getComponentDef(componentFactoryOrType), `Provided Component class doesn't contain Component definition. ` +
                    `Please check whether provided class has @Component decorator.`);
                assertEqual(typeof indexOrOptions !== 'number', true, 'It looks like Component type was provided as the first argument ' +
                    'and a number (representing an index at which to insert the new component\'s ' +
                    'host view into this container as the second argument. This combination of arguments ' +
                    'is incompatible. Please use an object as the second argument instead.');
            }
            const options = (indexOrOptions || {});
            index = options.index;
            injector = options.injector;
            projectableNodes = options.projectableNodes;
            ngModuleRef = options.ngModuleRef;
        }
        const componentFactory = isComponentFactory ?
            componentFactoryOrType :
            new R3ComponentFactory(getComponentDef(componentFactoryOrType));
        const contextInjector = injector || this.parentInjector;
        if (!ngModuleRef && componentFactory.ngModule == null && contextInjector) {
            // DO NOT REFACTOR. The code here used to have a `value || undefined` expression
            // which seems to cause internal google apps to fail. This is documented in the
            // following internal bug issue: go/b/142967802
            const result = contextInjector.get(NgModuleRef, null);
            if (result) {
                ngModuleRef = result;
            }
        }
        const componentRef = componentFactory.create(contextInjector, projectableNodes, undefined, ngModuleRef);
        this.insert(componentRef.hostView, index);
        return componentRef;
    }
    insert(viewRef, index) {
        const lView = viewRef._lView;
        const tView = lView[TVIEW];
        if (ngDevMode && viewRef.destroyed) {
            throw new Error('Cannot insert a destroyed View in a ViewContainer!');
        }
        if (viewAttachedToContainer(lView)) {
            // If view is already attached, detach it first so we clean up references appropriately.
            const prevIdx = this.indexOf(viewRef);
            // A view might be attached either to this or a different container. The `prevIdx` for
            // those cases will be:
            // equal to -1 for views attached to this ViewContainerRef
            // >= 0 for views attached to a different ViewContainerRef
            if (prevIdx !== -1) {
                this.detach(prevIdx);
            }
            else {
                const prevLContainer = lView[PARENT];
                ngDevMode &&
                    assertEqual(isLContainer(prevLContainer), true, 'An attached view should have its PARENT point to a container.');
                // We need to re-create a R3ViewContainerRef instance since those are not stored on
                // LView (nor anywhere else).
                const prevVCRef = new R3ViewContainerRef(prevLContainer, prevLContainer[T_HOST], prevLContainer[PARENT]);
                prevVCRef.detach(prevVCRef.indexOf(viewRef));
            }
        }
        // Logical operation of adding `LView` to `LContainer`
        const adjustedIdx = this._adjustIndex(index);
        const lContainer = this._lContainer;
        insertView(tView, lView, lContainer, adjustedIdx);
        // Physical operation of adding the DOM nodes.
        const beforeNode = getBeforeNodeForView(adjustedIdx, lContainer);
        const renderer = lView[RENDERER];
        const parentRNode = nativeParentNode(renderer, lContainer[NATIVE]);
        if (parentRNode !== null) {
            addViewToContainer(tView, lContainer[T_HOST], renderer, lView, parentRNode, beforeNode);
        }
        viewRef.attachToViewContainerRef();
        addToArray(getOrCreateViewRefs(lContainer), adjustedIdx, viewRef);
        return viewRef;
    }
    move(viewRef, newIndex) {
        if (ngDevMode && viewRef.destroyed) {
            throw new Error('Cannot move a destroyed View in a ViewContainer!');
        }
        return this.insert(viewRef, newIndex);
    }
    indexOf(viewRef) {
        const viewRefsArr = getViewRefs(this._lContainer);
        return viewRefsArr !== null ? viewRefsArr.indexOf(viewRef) : -1;
    }
    remove(index) {
        const adjustedIdx = this._adjustIndex(index, -1);
        const detachedView = detachView(this._lContainer, adjustedIdx);
        if (detachedView) {
            // Before destroying the view, remove it from the container's array of `ViewRef`s.
            // This ensures the view container length is updated before calling
            // `destroyLView`, which could recursively call view container methods that
            // rely on an accurate container length.
            // (e.g. a method on this view container being called by a child directive's OnDestroy
            // lifecycle hook)
            removeFromArray(getOrCreateViewRefs(this._lContainer), adjustedIdx);
            destroyLView(detachedView[TVIEW], detachedView);
        }
    }
    detach(index) {
        const adjustedIdx = this._adjustIndex(index, -1);
        const view = detachView(this._lContainer, adjustedIdx);
        const wasDetached = view && removeFromArray(getOrCreateViewRefs(this._lContainer), adjustedIdx) != null;
        return wasDetached ? new R3ViewRef(view) : null;
    }
    _adjustIndex(index, shift = 0) {
        if (index == null) {
            return this.length + shift;
        }
        if (ngDevMode) {
            assertGreaterThan(index, -1, `ViewRef index must be positive, got ${index}`);
            // +1 because it's legal to insert at the end.
            assertLessThan(index, this.length + 1 + shift, 'index');
        }
        return index;
    }
};
function getViewRefs(lContainer) {
    return lContainer[VIEW_REFS];
}
function getOrCreateViewRefs(lContainer) {
    return (lContainer[VIEW_REFS] || (lContainer[VIEW_REFS] = []));
}
/**
 * Creates a ViewContainerRef and stores it on the injector.
 *
 * @param ViewContainerRefToken The ViewContainerRef type
 * @param ElementRefToken The ElementRef type
 * @param hostTNode The node that is requesting a ViewContainerRef
 * @param hostLView The view to which the node belongs
 * @returns The ViewContainerRef instance to use
 */
export function createContainerRef(hostTNode, hostLView) {
    ngDevMode && assertTNodeType(hostTNode, 12 /* AnyContainer */ | 3 /* AnyRNode */);
    let lContainer;
    const slotValue = hostLView[hostTNode.index];
    if (isLContainer(slotValue)) {
        // If the host is a container, we don't need to create a new LContainer
        lContainer = slotValue;
    }
    else {
        let commentNode;
        // If the host is an element container, the native host element is guaranteed to be a
        // comment and we can reuse that comment as anchor element for the new LContainer.
        // The comment node in question is already part of the DOM structure so we don't need to append
        // it again.
        if (hostTNode.type & 8 /* ElementContainer */) {
            commentNode = unwrapRNode(slotValue);
        }
        else {
            // If the host is a regular element, we have to insert a comment node manually which will
            // be used as an anchor when inserting elements. In this specific case we use low-level DOM
            // manipulation to insert it.
            const renderer = hostLView[RENDERER];
            ngDevMode && ngDevMode.rendererCreateComment++;
            commentNode = renderer.createComment(ngDevMode ? 'container' : '');
            const hostNative = getNativeByTNode(hostTNode, hostLView);
            const parentOfHostNative = nativeParentNode(renderer, hostNative);
            nativeInsertBefore(renderer, parentOfHostNative, commentNode, nativeNextSibling(renderer, hostNative), false);
        }
        hostLView[hostTNode.index] = lContainer =
            createLContainer(slotValue, hostLView, commentNode, hostTNode);
        addToViewTree(hostLView, lContainer);
    }
    return new R3ViewContainerRef(lContainer, hostTNode, hostLView);
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injector} from '../di/injector';\nimport {isType, Type} from '../interface/type';\nimport {assertNodeInjector} from '../render3/assert';\nimport {ComponentFactory as R3ComponentFactory} from '../render3/component_ref';\nimport {getComponentDef} from '../render3/definition';\nimport {getParentInjectorLocation, NodeInjector} from '../render3/di';\nimport {addToViewTree, createLContainer} from '../render3/instructions/shared';\nimport {CONTAINER_HEADER_OFFSET, LContainer, NATIVE, VIEW_REFS} from '../render3/interfaces/container';\nimport {NodeInjectorOffset} from '../render3/interfaces/injector';\nimport {TContainerNode, TDirectiveHostNode, TElementContainerNode, TElementNode, TNodeType} from '../render3/interfaces/node';\nimport {RComment, RElement} from '../render3/interfaces/renderer_dom';\nimport {isLContainer} from '../render3/interfaces/type_checks';\nimport {LView, PARENT, RENDERER, T_HOST, TVIEW} from '../render3/interfaces/view';\nimport {assertTNodeType} from '../render3/node_assert';\nimport {addViewToContainer, destroyLView, detachView, getBeforeNodeForView, insertView, nativeInsertBefore, nativeNextSibling, nativeParentNode} from '../render3/node_manipulation';\nimport {getCurrentTNode, getLView} from '../render3/state';\nimport {getParentInjectorIndex, getParentInjectorView, hasParentInjector} from '../render3/util/injector_utils';\nimport {getNativeByTNode, unwrapRNode, viewAttachedToContainer} from '../render3/util/view_utils';\nimport {ViewRef as R3ViewRef} from '../render3/view_ref';\nimport {addToArray, removeFromArray} from '../util/array_utils';\nimport {assertDefined, assertEqual, assertGreaterThan, assertLessThan} from '../util/assert';\nimport {noop} from '../util/noop';\n\nimport {ComponentFactory, ComponentRef} from './component_factory';\nimport {createElementRef, ElementRef} from './element_ref';\nimport {NgModuleRef} from './ng_module_factory';\nimport {TemplateRef} from './template_ref';\nimport {EmbeddedViewRef, ViewRef} from './view_ref';\n\n\nexport const SWITCH_VIEW_CONTAINER_REF_FACTORY__POST_R3__ = injectViewContainerRef;\nconst SWITCH_VIEW_CONTAINER_REF_FACTORY__PRE_R3__ = noop as typeof injectViewContainerRef;\nconst SWITCH_VIEW_CONTAINER_REF_FACTORY: typeof injectViewContainerRef =\n    SWITCH_VIEW_CONTAINER_REF_FACTORY__PRE_R3__;\n\n/**\n * Represents a container where one or more views can be attached to a component.\n *\n * Can contain *host views* (created by instantiating a\n * component with the `createComponent()` method), and *embedded views*\n * (created by instantiating a `TemplateRef` with the `createEmbeddedView()` method).\n *\n * A view container instance can contain other view containers,\n * creating a [view hierarchy](guide/glossary#view-tree).\n *\n * @see `ComponentRef`\n * @see `EmbeddedViewRef`\n *\n * @publicApi\n */\nexport abstract class ViewContainerRef {\n  /**\n   * Anchor element that specifies the location of this container in the containing view.\n   * Each view container can have only one anchor element, and each anchor element\n   * can have only a single view container.\n   *\n   * Root elements of views attached to this container become siblings of the anchor element in\n   * the rendered view.\n   *\n   * Access the `ViewContainerRef` of an element by placing a `Directive` injected\n   * with `ViewContainerRef` on the element, or use a `ViewChild` query.\n   *\n   * <!-- TODO: rename to anchorElement -->\n   */\n  abstract get element(): ElementRef;\n\n  /**\n   * The [dependency injector](guide/glossary#injector) for this view container.\n   */\n  abstract get injector(): Injector;\n\n  /** @deprecated No replacement */\n  abstract get parentInjector(): Injector;\n\n  /**\n   * Destroys all views in this container.\n   */\n  abstract clear(): void;\n\n  /**\n   * Retrieves a view from this container.\n   * @param index The 0-based index of the view to retrieve.\n   * @returns The `ViewRef` instance, or null if the index is out of range.\n   */\n  abstract get(index: number): ViewRef|null;\n\n  /**\n   * Reports how many views are currently attached to this container.\n   * @returns The number of views.\n   */\n  abstract get length(): number;\n\n  /**\n   * Instantiates an embedded view and inserts it\n   * into this container.\n   * @param templateRef The HTML template that defines the view.\n   * @param context The data-binding context of the embedded view, as declared\n   * in the `<ng-template>` usage.\n   * @param index The 0-based index at which to insert the new view into this container.\n   * If not specified, appends the new view as the last entry.\n   *\n   * @returns The `ViewRef` instance for the newly created view.\n   */\n  abstract createEmbeddedView<C>(templateRef: TemplateRef<C>, context?: C, index?: number):\n      EmbeddedViewRef<C>;\n\n  /**\n   * Instantiates a single component and inserts its host view into this container.\n   *\n   * @param componentType Component Type to use.\n   * @param options An object that contains extra parameters:\n   *  * index: the index at which to insert the new component's host view into this container.\n   *           If not specified, appends the new view as the last entry.\n   *  * injector: the injector to use as the parent for the new component.\n   *  * ngModuleRef: an NgModuleRef of the component's NgModule, you should almost always provide\n   *                 this to ensure that all expected providers are available for the component\n   *                 instantiation.\n   *  * projectableNodes: list of DOM nodes that should be projected through\n   *                      [`<ng-content>`](api/core/ng-content) of the new component instance.\n   *\n   * @returns The new `ComponentRef` which contains the component instance and the host view.\n   */\n  abstract createComponent<C>(componentType: Type<C>, options?: {\n    index?: number,\n    injector?: Injector,\n    ngModuleRef?: NgModuleRef<unknown>,\n    projectableNodes?: Node[][],\n  }): ComponentRef<C>;\n\n  /**\n   * Instantiates a single component and inserts its host view into this container.\n   *\n   * @param componentFactory Component factory to use.\n   * @param index The index at which to insert the new component's host view into this container.\n   * If not specified, appends the new view as the last entry.\n   * @param injector The injector to use as the parent for the new component.\n   * @param projectableNodes List of DOM nodes that should be projected through\n   *     [`<ng-content>`](api/core/ng-content) of the new component instance.\n   * @param ngModuleRef An instance of the NgModuleRef that represent an NgModule.\n   * This information is used to retrieve corresponding NgModule injector.\n   *\n   * @returns The new `ComponentRef` which contains the component instance and the host view.\n   *\n   * @deprecated Angular no longer requires component factories to dynamically create components.\n   *     Use different signature of the `createComponent` method, which allows passing\n   *     Component class directly.\n   */\n  abstract createComponent<C>(\n      componentFactory: ComponentFactory<C>, index?: number, injector?: Injector,\n      projectableNodes?: any[][], ngModuleRef?: NgModuleRef<any>): ComponentRef<C>;\n\n  /**\n   * Inserts a view into this container.\n   * @param viewRef The view to insert.\n   * @param index The 0-based index at which to insert the view.\n   * If not specified, appends the new view as the last entry.\n   * @returns The inserted `ViewRef` instance.\n   *\n   */\n  abstract insert(viewRef: ViewRef, index?: number): ViewRef;\n\n  /**\n   * Moves a view to a new location in this container.\n   * @param viewRef The view to move.\n   * @param index The 0-based index of the new location.\n   * @returns The moved `ViewRef` instance.\n   */\n  abstract move(viewRef: ViewRef, currentIndex: number): ViewRef;\n\n  /**\n   * Returns the index of a view within the current container.\n   * @param viewRef The view to query.\n   * @returns The 0-based index of the view's position in this container,\n   * or `-1` if this container doesn't contain the view.\n   */\n  abstract indexOf(viewRef: ViewRef): number;\n\n  /**\n   * Destroys a view attached to this container\n   * @param index The 0-based index of the view to destroy.\n   * If not specified, the last view in the container is removed.\n   */\n  abstract remove(index?: number): void;\n\n  /**\n   * Detaches a view from this container without destroying it.\n   * Use along with `insert()` to move a view within the current container.\n   * @param index The 0-based index of the view to detach.\n   * If not specified, the last view in the container is detached.\n   */\n  abstract detach(index?: number): ViewRef|null;\n\n  /**\n   * @internal\n   * @nocollapse\n   */\n  static __NG_ELEMENT_ID__: () => ViewContainerRef = SWITCH_VIEW_CONTAINER_REF_FACTORY;\n}\n\n/**\n * Creates a ViewContainerRef and stores it on the injector. Or, if the ViewContainerRef\n * already exists, retrieves the existing ViewContainerRef.\n *\n * @returns The ViewContainerRef instance to use\n */\nexport function injectViewContainerRef(): ViewContainerRef {\n  const previousTNode = getCurrentTNode() as TElementNode | TElementContainerNode | TContainerNode;\n  return createContainerRef(previousTNode, getLView());\n}\n\nconst VE_ViewContainerRef = ViewContainerRef;\n\nconst R3ViewContainerRef = class ViewContainerRef extends VE_ViewContainerRef {\n  constructor(\n      private _lContainer: LContainer,\n      private _hostTNode: TElementNode|TContainerNode|TElementContainerNode,\n      private _hostLView: LView) {\n    super();\n  }\n\n  override get element(): ElementRef {\n    return createElementRef(this._hostTNode, this._hostLView);\n  }\n\n  override get injector(): Injector {\n    return new NodeInjector(this._hostTNode, this._hostLView);\n  }\n\n  /** @deprecated No replacement */\n  override get parentInjector(): Injector {\n    const parentLocation = getParentInjectorLocation(this._hostTNode, this._hostLView);\n    if (hasParentInjector(parentLocation)) {\n      const parentView = getParentInjectorView(parentLocation, this._hostLView);\n      const injectorIndex = getParentInjectorIndex(parentLocation);\n      ngDevMode && assertNodeInjector(parentView, injectorIndex);\n      const parentTNode =\n          parentView[TVIEW].data[injectorIndex + NodeInjectorOffset.TNODE] as TElementNode;\n      return new NodeInjector(parentTNode, parentView);\n    } else {\n      return new NodeInjector(null, this._hostLView);\n    }\n  }\n\n  override clear(): void {\n    while (this.length > 0) {\n      this.remove(this.length - 1);\n    }\n  }\n\n  override get(index: number): ViewRef|null {\n    const viewRefs = getViewRefs(this._lContainer);\n    return viewRefs !== null && viewRefs[index] || null;\n  }\n\n  override get length(): number {\n    return this._lContainer.length - CONTAINER_HEADER_OFFSET;\n  }\n\n  override createEmbeddedView<C>(templateRef: TemplateRef<C>, context?: C, index?: number):\n      EmbeddedViewRef<C> {\n    const viewRef = templateRef.createEmbeddedView(context || <any>{});\n    this.insert(viewRef, index);\n    return viewRef;\n  }\n\n  override createComponent<C>(componentType: Type<C>, options?: {\n    index?: number,\n    injector?: Injector,\n    projectableNodes?: Node[][],\n    ngModuleRef?: NgModuleRef<unknown>,\n  }): ComponentRef<C>;\n  /**\n   * @deprecated Angular no longer requires component factories to dynamically create components.\n   *     Use different signature of the `createComponent` method, which allows passing\n   *     Component class directly.\n   */\n  override createComponent<C>(\n      componentFactory: ComponentFactory<C>, index?: number|undefined,\n      injector?: Injector|undefined, projectableNodes?: any[][]|undefined,\n      ngModuleRef?: NgModuleRef<any>|undefined): ComponentRef<C>;\n  override createComponent<C>(\n      componentFactoryOrType: ComponentFactory<C>|Type<C>, indexOrOptions?: number|undefined|{\n        index?: number,\n        injector?: Injector,\n        ngModuleRef?: NgModuleRef<unknown>,\n        projectableNodes?: Node[][],\n      },\n      injector?: Injector|undefined, projectableNodes?: any[][]|undefined,\n      ngModuleRef?: NgModuleRef<any>|undefined): ComponentRef<C> {\n    const isComponentFactory = componentFactoryOrType && !isType(componentFactoryOrType);\n    let index: number|undefined;\n\n    // This function supports 2 signatures and we need to handle options correctly for both:\n    //   1. When first argument is a Component type. This signature also requires extra\n    //      options to be provided as as object (more ergonomic option).\n    //   2. First argument is a Component factory. In this case extra options are represented as\n    //      positional arguments. This signature is less ergonomic and will be deprecated.\n    if (isComponentFactory) {\n      if (ngDevMode) {\n        assertEqual(\n            typeof indexOrOptions !== 'object', true,\n            'It looks like Component factory was provided as the first argument ' +\n                'and an options object as the second argument. This combination of arguments ' +\n                'is incompatible. You can either change the first argument to provide Component ' +\n                'type or change the second argument to be a number (representing an index at ' +\n                'which to insert the new component\\'s host view into this container)');\n      }\n      index = indexOrOptions as number | undefined;\n    } else {\n      if (ngDevMode) {\n        assertDefined(\n            getComponentDef(componentFactoryOrType),\n            `Provided Component class doesn't contain Component definition. ` +\n                `Please check whether provided class has @Component decorator.`);\n        assertEqual(\n            typeof indexOrOptions !== 'number', true,\n            'It looks like Component type was provided as the first argument ' +\n                'and a number (representing an index at which to insert the new component\\'s ' +\n                'host view into this container as the second argument. This combination of arguments ' +\n                'is incompatible. Please use an object as the second argument instead.');\n      }\n      const options = (indexOrOptions || {}) as {\n        index?: number,\n        injector?: Injector,\n        ngModuleRef?: NgModuleRef<unknown>,\n        projectableNodes?: Node[][],\n      };\n      index = options.index;\n      injector = options.injector;\n      projectableNodes = options.projectableNodes;\n      ngModuleRef = options.ngModuleRef;\n    }\n\n    const componentFactory: ComponentFactory<C> = isComponentFactory ?\n        componentFactoryOrType as ComponentFactory<C>:\n        new R3ComponentFactory(getComponentDef(componentFactoryOrType)!);\n    const contextInjector = injector || this.parentInjector;\n    if (!ngModuleRef && (componentFactory as any).ngModule == null && contextInjector) {\n      // DO NOT REFACTOR. The code here used to have a `value || undefined` expression\n      // which seems to cause internal google apps to fail. This is documented in the\n      // following internal bug issue: go/b/142967802\n      const result = contextInjector.get(NgModuleRef, null);\n      if (result) {\n        ngModuleRef = result;\n      }\n    }\n\n    const componentRef =\n        componentFactory.create(contextInjector, projectableNodes, undefined, ngModuleRef);\n    this.insert(componentRef.hostView, index);\n    return componentRef;\n  }\n\n  override insert(viewRef: ViewRef, index?: number): ViewRef {\n    const lView = (viewRef as R3ViewRef<any>)._lView!;\n    const tView = lView[TVIEW];\n\n    if (ngDevMode && viewRef.destroyed) {\n      throw new Error('Cannot insert a destroyed View in a ViewContainer!');\n    }\n\n    if (viewAttachedToContainer(lView)) {\n      // If view is already attached, detach it first so we clean up references appropriately.\n\n      const prevIdx = this.indexOf(viewRef);\n\n      // A view might be attached either to this or a different container. The `prevIdx` for\n      // those cases will be:\n      // equal to -1 for views attached to this ViewContainerRef\n      // >= 0 for views attached to a different ViewContainerRef\n      if (prevIdx !== -1) {\n        this.detach(prevIdx);\n      } else {\n        const prevLContainer = lView[PARENT] as LContainer;\n        ngDevMode &&\n            assertEqual(\n                isLContainer(prevLContainer), true,\n                'An attached view should have its PARENT point to a container.');\n\n\n        // We need to re-create a R3ViewContainerRef instance since those are not stored on\n        // LView (nor anywhere else).\n        const prevVCRef = new R3ViewContainerRef(\n            prevLContainer, prevLContainer[T_HOST] as TDirectiveHostNode, prevLContainer[PARENT]);\n\n        prevVCRef.detach(prevVCRef.indexOf(viewRef));\n      }\n    }\n\n    // Logical operation of adding `LView` to `LContainer`\n    const adjustedIdx = this._adjustIndex(index);\n    const lContainer = this._lContainer;\n    insertView(tView, lView, lContainer, adjustedIdx);\n\n    // Physical operation of adding the DOM nodes.\n    const beforeNode = getBeforeNodeForView(adjustedIdx, lContainer);\n    const renderer = lView[RENDERER];\n    const parentRNode = nativeParentNode(renderer, lContainer[NATIVE] as RElement | RComment);\n    if (parentRNode !== null) {\n      addViewToContainer(tView, lContainer[T_HOST], renderer, lView, parentRNode, beforeNode);\n    }\n\n    (viewRef as R3ViewRef<any>).attachToViewContainerRef();\n    addToArray(getOrCreateViewRefs(lContainer), adjustedIdx, viewRef);\n\n    return viewRef;\n  }\n\n  override move(viewRef: ViewRef, newIndex: number): ViewRef {\n    if (ngDevMode && viewRef.destroyed) {\n      throw new Error('Cannot move a destroyed View in a ViewContainer!');\n    }\n    return this.insert(viewRef, newIndex);\n  }\n\n  override indexOf(viewRef: ViewRef): number {\n    const viewRefsArr = getViewRefs(this._lContainer);\n    return viewRefsArr !== null ? viewRefsArr.indexOf(viewRef) : -1;\n  }\n\n  override remove(index?: number): void {\n    const adjustedIdx = this._adjustIndex(index, -1);\n    const detachedView = detachView(this._lContainer, adjustedIdx);\n\n    if (detachedView) {\n      // Before destroying the view, remove it from the container's array of `ViewRef`s.\n      // This ensures the view container length is updated before calling\n      // `destroyLView`, which could recursively call view container methods that\n      // rely on an accurate container length.\n      // (e.g. a method on this view container being called by a child directive's OnDestroy\n      // lifecycle hook)\n      removeFromArray(getOrCreateViewRefs(this._lContainer), adjustedIdx);\n      destroyLView(detachedView[TVIEW], detachedView);\n    }\n  }\n\n  override detach(index?: number): ViewRef|null {\n    const adjustedIdx = this._adjustIndex(index, -1);\n    const view = detachView(this._lContainer, adjustedIdx);\n\n    const wasDetached =\n        view && removeFromArray(getOrCreateViewRefs(this._lContainer), adjustedIdx) != null;\n    return wasDetached ? new R3ViewRef(view!) : null;\n  }\n\n  private _adjustIndex(index?: number, shift: number = 0) {\n    if (index == null) {\n      return this.length + shift;\n    }\n    if (ngDevMode) {\n      assertGreaterThan(index, -1, `ViewRef index must be positive, got ${index}`);\n      // +1 because it's legal to insert at the end.\n      assertLessThan(index, this.length + 1 + shift, 'index');\n    }\n    return index;\n  }\n};\n\nfunction getViewRefs(lContainer: LContainer): ViewRef[]|null {\n  return lContainer[VIEW_REFS] as ViewRef[];\n}\n\nfunction getOrCreateViewRefs(lContainer: LContainer): ViewRef[] {\n  return (lContainer[VIEW_REFS] || (lContainer[VIEW_REFS] = [])) as ViewRef[];\n}\n\n/**\n * Creates a ViewContainerRef and stores it on the injector.\n *\n * @param ViewContainerRefToken The ViewContainerRef type\n * @param ElementRefToken The ElementRef type\n * @param hostTNode The node that is requesting a ViewContainerRef\n * @param hostLView The view to which the node belongs\n * @returns The ViewContainerRef instance to use\n */\nexport function createContainerRef(\n    hostTNode: TElementNode|TContainerNode|TElementContainerNode,\n    hostLView: LView): ViewContainerRef {\n  ngDevMode && assertTNodeType(hostTNode, TNodeType.AnyContainer | TNodeType.AnyRNode);\n\n  let lContainer: LContainer;\n  const slotValue = hostLView[hostTNode.index];\n  if (isLContainer(slotValue)) {\n    // If the host is a container, we don't need to create a new LContainer\n    lContainer = slotValue;\n  } else {\n    let commentNode: RComment;\n    // If the host is an element container, the native host element is guaranteed to be a\n    // comment and we can reuse that comment as anchor element for the new LContainer.\n    // The comment node in question is already part of the DOM structure so we don't need to append\n    // it again.\n    if (hostTNode.type & TNodeType.ElementContainer) {\n      commentNode = unwrapRNode(slotValue) as RComment;\n    } else {\n      // If the host is a regular element, we have to insert a comment node manually which will\n      // be used as an anchor when inserting elements. In this specific case we use low-level DOM\n      // manipulation to insert it.\n      const renderer = hostLView[RENDERER];\n      ngDevMode && ngDevMode.rendererCreateComment++;\n      commentNode = renderer.createComment(ngDevMode ? 'container' : '');\n\n      const hostNative = getNativeByTNode(hostTNode, hostLView)!;\n      const parentOfHostNative = nativeParentNode(renderer, hostNative);\n      nativeInsertBefore(\n          renderer, parentOfHostNative!, commentNode, nativeNextSibling(renderer, hostNative),\n          false);\n    }\n\n    hostLView[hostTNode.index] = lContainer =\n        createLContainer(slotValue, hostLView, commentNode, hostTNode);\n\n    addToViewTree(hostLView, lContainer);\n  }\n\n  return new R3ViewContainerRef(lContainer, hostTNode, hostLView);\n}\n"]}