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@angular/core

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Angular - the core framework

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/** * @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 { hasInSkipHydrationBlockFlag } from '../hydration/skip_hydration'; import { assertDefined } from '../util/assert'; import { assertLContainer, assertLView, assertTNodeForLView } from './assert'; import { renderView } from './instructions/render'; import { createLView } from './instructions/shared'; import { CONTAINER_HEADER_OFFSET, NATIVE } from './interfaces/container'; import { DECLARATION_LCONTAINER, FLAGS, HYDRATION, QUERIES, RENDERER, T_HOST, TVIEW } from './interfaces/view'; import { addViewToDOM, destroyLView, detachView, getBeforeNodeForView, insertView, nativeParentNode } from './node_manipulation'; export function createAndRenderEmbeddedLView(declarationLView, templateTNode, context, options) { const embeddedTView = templateTNode.tView; ngDevMode && assertDefined(embeddedTView, 'TView must be defined for a template node.'); ngDevMode && assertTNodeForLView(templateTNode, declarationLView); // Embedded views follow the change detection strategy of the view they're declared in. const isSignalView = declarationLView[FLAGS] & 4096 /* LViewFlags.SignalView */; const viewFlags = isSignalView ? 4096 /* LViewFlags.SignalView */ : 16 /* LViewFlags.CheckAlways */; const embeddedLView = createLView(declarationLView, embeddedTView, context, viewFlags, null, templateTNode, null, null, null, options?.injector ?? null, options?.dehydratedView ?? null); const declarationLContainer = declarationLView[templateTNode.index]; ngDevMode && assertLContainer(declarationLContainer); embeddedLView[DECLARATION_LCONTAINER] = declarationLContainer; const declarationViewLQueries = declarationLView[QUERIES]; if (declarationViewLQueries !== null) { embeddedLView[QUERIES] = declarationViewLQueries.createEmbeddedView(embeddedTView); } // execute creation mode of a view renderView(embeddedTView, embeddedLView, context); return embeddedLView; } export function getLViewFromLContainer(lContainer, index) { const adjustedIndex = CONTAINER_HEADER_OFFSET + index; // avoid reading past the array boundaries if (adjustedIndex < lContainer.length) { const lView = lContainer[adjustedIndex]; ngDevMode && assertLView(lView); return lView; } return undefined; } /** * Returns whether an elements that belong to a view should be * inserted into the DOM. For client-only cases, DOM elements are * always inserted. For hydration cases, we check whether serialized * info is available for a view and the view is not in a "skip hydration" * block (in which case view contents was re-created, thus needing insertion). */ export function shouldAddViewToDom(tNode, dehydratedView) { return !dehydratedView || dehydratedView.firstChild === null || hasInSkipHydrationBlockFlag(tNode); } export function addLViewToLContainer(lContainer, lView, index, addToDOM = true) { const tView = lView[TVIEW]; // Insert into the view tree so the new view can be change-detected insertView(tView, lView, lContainer, index); // Insert elements that belong to this view into the DOM tree if (addToDOM) { const beforeNode = getBeforeNodeForView(index, lContainer); const renderer = lView[RENDERER]; const parentRNode = nativeParentNode(renderer, lContainer[NATIVE]); if (parentRNode !== null) { addViewToDOM(tView, lContainer[T_HOST], renderer, lView, parentRNode, beforeNode); } } // When in hydration mode, reset the pointer to the first child in // the dehydrated view. This indicates that the view was hydrated and // further attaching/detaching should work with this view as normal. const hydrationInfo = lView[HYDRATION]; if (hydrationInfo !== null && hydrationInfo.firstChild !== null) { hydrationInfo.firstChild = null; } } export function removeLViewFromLContainer(lContainer, index) { const lView = detachView(lContainer, index); if (lView !== undefined) { destroyLView(lView[TVIEW], lView); } return lView; } //# 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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 {DehydratedContainerView} from '../hydration/interfaces';\nimport {hasInSkipHydrationBlockFlag} from '../hydration/skip_hydration';\nimport {assertDefined} from '../util/assert';\n\nimport {assertLContainer, assertLView, assertTNodeForLView} from './assert';\nimport {renderView} from './instructions/render';\nimport {createLView} from './instructions/shared';\nimport {CONTAINER_HEADER_OFFSET, LContainer, NATIVE} from './interfaces/container';\nimport {TNode} from './interfaces/node';\nimport {RComment, RElement} from './interfaces/renderer_dom';\nimport {DECLARATION_LCONTAINER, FLAGS, HYDRATION, LView, LViewFlags, QUERIES, RENDERER, T_HOST, TVIEW} from './interfaces/view';\nimport {addViewToDOM, destroyLView, detachView, getBeforeNodeForView, insertView, nativeParentNode} from './node_manipulation';\n\nexport function createAndRenderEmbeddedLView<T>(\n    declarationLView: LView<unknown>, templateTNode: TNode, context: T,\n    options?: {injector?: Injector, dehydratedView?: DehydratedContainerView|null}): LView<T> {\n  const embeddedTView = templateTNode.tView!;\n  ngDevMode && assertDefined(embeddedTView, 'TView must be defined for a template node.');\n  ngDevMode && assertTNodeForLView(templateTNode, declarationLView);\n\n  // Embedded views follow the change detection strategy of the view they're declared in.\n  const isSignalView = declarationLView[FLAGS] & LViewFlags.SignalView;\n  const viewFlags = isSignalView ? LViewFlags.SignalView : LViewFlags.CheckAlways;\n  const embeddedLView = createLView<T>(\n      declarationLView, embeddedTView, context, viewFlags, null, templateTNode, null, null, null,\n      options?.injector ?? null, options?.dehydratedView ?? null);\n\n  const declarationLContainer = declarationLView[templateTNode.index];\n  ngDevMode && assertLContainer(declarationLContainer);\n  embeddedLView[DECLARATION_LCONTAINER] = declarationLContainer;\n\n  const declarationViewLQueries = declarationLView[QUERIES];\n  if (declarationViewLQueries !== null) {\n    embeddedLView[QUERIES] = declarationViewLQueries.createEmbeddedView(embeddedTView);\n  }\n\n  // execute creation mode of a view\n  renderView(embeddedTView, embeddedLView, context);\n\n  return embeddedLView;\n}\n\nexport function getLViewFromLContainer<T>(lContainer: LContainer, index: number): LView<T>|\n    undefined {\n  const adjustedIndex = CONTAINER_HEADER_OFFSET + index;\n  // avoid reading past the array boundaries\n  if (adjustedIndex < lContainer.length) {\n    const lView = lContainer[adjustedIndex];\n    ngDevMode && assertLView(lView);\n    return lView as LView<T>;\n  }\n  return undefined;\n}\n\n/**\n * Returns whether an elements that belong to a view should be\n * inserted into the DOM. For client-only cases, DOM elements are\n * always inserted. For hydration cases, we check whether serialized\n * info is available for a view and the view is not in a \"skip hydration\"\n * block (in which case view contents was re-created, thus needing insertion).\n */\nexport function shouldAddViewToDom(\n    tNode: TNode, dehydratedView?: DehydratedContainerView|null): boolean {\n  return !dehydratedView || dehydratedView.firstChild === null ||\n      hasInSkipHydrationBlockFlag(tNode);\n}\n\nexport function addLViewToLContainer(\n    lContainer: LContainer, lView: LView<unknown>, index: number, addToDOM = true): void {\n  const tView = lView[TVIEW];\n\n  // Insert into the view tree so the new view can be change-detected\n  insertView(tView, lView, lContainer, index);\n\n  // Insert elements that belong to this view into the DOM tree\n  if (addToDOM) {\n    const beforeNode = getBeforeNodeForView(index, lContainer);\n    const renderer = lView[RENDERER];\n    const parentRNode = nativeParentNode(renderer, lContainer[NATIVE] as RElement | RComment);\n    if (parentRNode !== null) {\n      addViewToDOM(tView, lContainer[T_HOST], renderer, lView, parentRNode, beforeNode);\n    }\n  }\n\n  // When in hydration mode, reset the pointer to the first child in\n  // the dehydrated view. This indicates that the view was hydrated and\n  // further attaching/detaching should work with this view as normal.\n  const hydrationInfo = lView[HYDRATION];\n  if (hydrationInfo !== null && hydrationInfo.firstChild !== null) {\n    hydrationInfo.firstChild = null;\n  }\n}\n\nexport function removeLViewFromLContainer(lContainer: LContainer, index: number): LView<unknown>|\n    undefined {\n  const lView = detachView(lContainer, index);\n  if (lView !== undefined) {\n    destroyLView(lView[TVIEW], lView);\n  }\n  return lView;\n}\n"]}