shared.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 {consumerAfterComputation, consumerBeforeComputation, setActiveConsumer} from '@angular/core/primitives/signals';

import {Injector} from '../../di/injector';
import {ErrorHandler} from '../../error_handler';
import {RuntimeError, RuntimeErrorCode} from '../../errors';
import {DehydratedView} from '../../hydration/interfaces';
import {hasSkipHydrationAttrOnRElement} from '../../hydration/skip_hydration';
import {PRESERVE_HOST_CONTENT, PRESERVE_HOST_CONTENT_DEFAULT} from '../../hydration/tokens';
import {processTextNodeMarkersBeforeHydration} from '../../hydration/utils';
import {DoCheck, OnChanges, OnInit} from '../../interface/lifecycle_hooks';
import {Writable} from '../../interface/type';
import {SchemaMetadata} from '../../metadata/schema';
import {ViewEncapsulation} from '../../metadata/view';
import {validateAgainstEventAttributes, validateAgainstEventProperties} from '../../sanitization/sanitization';
import {assertDefined, assertEqual, assertGreaterThan, assertGreaterThanOrEqual, assertIndexInRange, assertNotEqual, assertNotSame, assertSame, assertString} from '../../util/assert';
import {escapeCommentText} from '../../util/dom';
import {normalizeDebugBindingName, normalizeDebugBindingValue} from '../../util/ng_reflect';
import {stringify} from '../../util/stringify';
import {assertFirstCreatePass, assertFirstUpdatePass, assertLView, assertNoDuplicateDirectives, assertTNodeForLView, assertTNodeForTView} from '../assert';
import {attachPatchData} from '../context_discovery';
import {getFactoryDef} from '../definition_factory';
import {diPublicInInjector, getNodeInjectable, getOrCreateNodeInjectorForNode} from '../di';
import {throwMultipleComponentError} from '../errors';
import {CONTAINER_HEADER_OFFSET, LContainer} from '../interfaces/container';
import {ComponentDef, ComponentTemplate, DirectiveDef, DirectiveDefListOrFactory, HostBindingsFunction, HostDirectiveBindingMap, HostDirectiveDefs, PipeDefListOrFactory, RenderFlags, ViewQueriesFunction} from '../interfaces/definition';
import {NodeInjectorFactory} from '../interfaces/injector';
import {getUniqueLViewId} from '../interfaces/lview_tracking';
import {AttributeMarker, InitialInputData, InitialInputs, LocalRefExtractor, PropertyAliases, PropertyAliasValue, TAttributes, TConstantsOrFactory, TContainerNode, TDirectiveHostNode, TElementContainerNode, TElementNode, TIcuContainerNode, TNode, TNodeFlags, TNodeType, TProjectionNode} from '../interfaces/node';
import {Renderer} from '../interfaces/renderer';
import {RComment, RElement, RNode, RText} from '../interfaces/renderer_dom';
import {SanitizerFn} from '../interfaces/sanitization';
import {isComponentDef, isComponentHost, isContentQueryHost} from '../interfaces/type_checks';
import {CHILD_HEAD, CHILD_TAIL, CLEANUP, CONTEXT, DECLARATION_COMPONENT_VIEW, DECLARATION_VIEW, EMBEDDED_VIEW_INJECTOR, ENVIRONMENT, FLAGS, HEADER_OFFSET, HOST, HostBindingOpCodes, HYDRATION, ID, INJECTOR, LView, LViewEnvironment, LViewFlags, NEXT, PARENT, REACTIVE_HOST_BINDING_CONSUMER, REACTIVE_TEMPLATE_CONSUMER, RENDERER, T_HOST, TData, TVIEW, TView, TViewType} from '../interfaces/view';
import {assertPureTNodeType, assertTNodeType} from '../node_assert';
import {clearElementContents, updateTextNode} from '../node_manipulation';
import {isInlineTemplate, isNodeMatchingSelectorList} from '../node_selector_matcher';
import {profiler, ProfilerEvent} from '../profiler';
import {getReactiveLViewConsumer} from '../reactive_lview_consumer';
import {getBindingsEnabled, getCurrentDirectiveIndex, getCurrentParentTNode, getCurrentTNodePlaceholderOk, getSelectedIndex, isCurrentTNodeParent, isInCheckNoChangesMode, isInI18nBlock, isInSkipHydrationBlock, setBindingRootForHostBindings, setCurrentDirectiveIndex, setCurrentQueryIndex, setCurrentTNode, setSelectedIndex} from '../state';
import {NO_CHANGE} from '../tokens';
import {mergeHostAttrs} from '../util/attrs_utils';
import {INTERPOLATION_DELIMITER} from '../util/misc_utils';
import {renderStringify} from '../util/stringify_utils';
import {getComponentLViewByIndex, getNativeByIndex, getNativeByTNode, resetPreOrderHookFlags, unwrapLView} from '../util/view_utils';

import {selectIndexInternal} from './advance';
import {ɵɵdirectiveInject} from './di';
import {handleUnknownPropertyError, isPropertyValid, matchingSchemas} from './element_validation';

/**
 * Invoke `HostBindingsFunction`s for view.
 *
 * This methods executes `TView.hostBindingOpCodes`. It is used to execute the
 * `HostBindingsFunction`s associated with the current `LView`.
 *
 * @param tView Current `TView`.
 * @param lView Current `LView`.
 */
export function processHostBindingOpCodes(tView: TView, lView: LView): void {
  const hostBindingOpCodes = tView.hostBindingOpCodes;
  if (hostBindingOpCodes === null) return;
  const consumer = getReactiveLViewConsumer(lView, REACTIVE_HOST_BINDING_CONSUMER);
  try {
    for (let i = 0; i < hostBindingOpCodes.length; i++) {
      const opCode = hostBindingOpCodes[i] as number;
      if (opCode < 0) {
        // Negative numbers are element indexes.
        setSelectedIndex(~opCode);
      } else {
        // Positive numbers are NumberTuple which store bindingRootIndex and directiveIndex.
        const directiveIdx = opCode;
        const bindingRootIndx = hostBindingOpCodes[++i] as number;
        const hostBindingFn = hostBindingOpCodes[++i] as HostBindingsFunction<any>;
        setBindingRootForHostBindings(bindingRootIndx, directiveIdx);
        consumer.dirty = false;
        const prevConsumer = consumerBeforeComputation(consumer);
        try {
          const context = lView[directiveIdx];
          hostBindingFn(RenderFlags.Update, context);
        } finally {
          consumerAfterComputation(consumer, prevConsumer);
        }
      }
    }
  } finally {
    setSelectedIndex(-1);
  }
}

export function createLView<T>(
    parentLView: LView|null, tView: TView, context: T|null, flags: LViewFlags, host: RElement|null,
    tHostNode: TNode|null, environment: LViewEnvironment|null, renderer: Renderer|null,
    injector: Injector|null, embeddedViewInjector: Injector|null,
    hydrationInfo: DehydratedView|null): LView<T> {
  const lView = tView.blueprint.slice() as LView;
  lView[HOST] = host;
  lView[FLAGS] = flags | LViewFlags.CreationMode | LViewFlags.Attached | LViewFlags.FirstLViewPass;
  if (embeddedViewInjector !== null ||
      (parentLView && (parentLView[FLAGS] & LViewFlags.HasEmbeddedViewInjector))) {
    lView[FLAGS] |= LViewFlags.HasEmbeddedViewInjector;
  }
  resetPreOrderHookFlags(lView);
  ngDevMode && tView.declTNode && parentLView && assertTNodeForLView(tView.declTNode, parentLView);
  lView[PARENT] = lView[DECLARATION_VIEW] = parentLView;
  lView[CONTEXT] = context;
  lView[ENVIRONMENT] = (environment || parentLView && parentLView[ENVIRONMENT])!;
  ngDevMode && assertDefined(lView[ENVIRONMENT], 'LViewEnvironment is required');
  lView[RENDERER] = (renderer || parentLView && parentLView[RENDERER])!;
  ngDevMode && assertDefined(lView[RENDERER], 'Renderer is required');
  lView[INJECTOR as any] = injector || parentLView && parentLView[INJECTOR] || null;
  lView[T_HOST] = tHostNode;
  lView[ID] = getUniqueLViewId();
  lView[HYDRATION] = hydrationInfo;
  lView[EMBEDDED_VIEW_INJECTOR as any] = embeddedViewInjector;

  ngDevMode &&
      assertEqual(
          tView.type == TViewType.Embedded ? parentLView !== null : true, true,
          'Embedded views must have parentLView');
  lView[DECLARATION_COMPONENT_VIEW] =
      tView.type == TViewType.Embedded ? parentLView![DECLARATION_COMPONENT_VIEW] : lView;
  return lView as LView<T>;
}

/**
 * Create and stores the TNode, and hooks it up to the tree.
 *
 * @param tView The current `TView`.
 * @param index The index at which the TNode should be saved (null if view, since they are not
 * saved).
 * @param type The type of TNode to create
 * @param native The native element for this node, if applicable
 * @param name The tag name of the associated native element, if applicable
 * @param attrs Any attrs for the native element, if applicable
 */
export function getOrCreateTNode(
    tView: TView, index: number, type: TNodeType.Element|TNodeType.Text, name: string|null,
    attrs: TAttributes|null): TElementNode;
export function getOrCreateTNode(
    tView: TView, index: number, type: TNodeType.Container, name: string|null,
    attrs: TAttributes|null): TContainerNode;
export function getOrCreateTNode(
    tView: TView, index: number, type: TNodeType.Projection, name: null,
    attrs: TAttributes|null): TProjectionNode;
export function getOrCreateTNode(
    tView: TView, index: number, type: TNodeType.ElementContainer, name: string|null,
    attrs: TAttributes|null): TElementContainerNode;
export function getOrCreateTNode(
    tView: TView, index: number, type: TNodeType.Icu, name: null,
    attrs: TAttributes|null): TElementContainerNode;
export function getOrCreateTNode(
    tView: TView, index: number, type: TNodeType, name: string|null, attrs: TAttributes|null):
    TElementNode&TContainerNode&TElementContainerNode&TProjectionNode&TIcuContainerNode {
  ngDevMode && index !== 0 &&  // 0 are bogus nodes and they are OK. See `createContainerRef` in
                               // `view_engine_compatibility` for additional context.
      assertGreaterThanOrEqual(index, HEADER_OFFSET, 'TNodes can\'t be in the LView header.');
  // Keep this function short, so that the VM will inline it.
  ngDevMode && assertPureTNodeType(type);
  let tNode = tView.data[index] as TNode;
  if (tNode === null) {
    tNode = createTNodeAtIndex(tView, index, type, name, attrs);
    if (isInI18nBlock()) {
      // If we are in i18n block then all elements should be pre declared through `Placeholder`
      // See `TNodeType.Placeholder` and `LFrame.inI18n` for more context.
      // If the `TNode` was not pre-declared than it means it was not mentioned which means it was
      // removed, so we mark it as detached.
      tNode.flags |= TNodeFlags.isDetached;
    }
  } else if (tNode.type & TNodeType.Placeholder) {
    tNode.type = type;
    tNode.value = name;
    tNode.attrs = attrs;
    const parent = getCurrentParentTNode();
    tNode.injectorIndex = parent === null ? -1 : parent.injectorIndex;
    ngDevMode && assertTNodeForTView(tNode, tView);
    ngDevMode && assertEqual(index, tNode.index, 'Expecting same index');
  }
  setCurrentTNode(tNode, true);
  return tNode as TElementNode & TContainerNode & TElementContainerNode & TProjectionNode &
      TIcuContainerNode;
}

export function createTNodeAtIndex(
    tView: TView, index: number, type: TNodeType, name: string|null, attrs: TAttributes|null) {
  const currentTNode = getCurrentTNodePlaceholderOk();
  const isParent = isCurrentTNodeParent();
  const parent = isParent ? currentTNode : currentTNode && currentTNode.parent;
  // Parents cannot cross component boundaries because components will be used in multiple places.
  const tNode = tView.data[index] =
      createTNode(tView, parent as TElementNode | TContainerNode, type, index, name, attrs);
  // Assign a pointer to the first child node of a given view. The first node is not always the one
  // at index 0, in case of i18n, index 0 can be the instruction `i18nStart` and the first node has
  // the index 1 or more, so we can't just check node index.
  if (tView.firstChild === null) {
    tView.firstChild = tNode;
  }
  if (currentTNode !== null) {
    if (isParent) {
      // FIXME(misko): This logic looks unnecessarily complicated. Could we simplify?
      if (currentTNode.child == null && tNode.parent !== null) {
        // We are in the same view, which means we are adding content node to the parent view.
        currentTNode.child = tNode;
      }
    } else {
      if (currentTNode.next === null) {
        // In the case of i18n the `currentTNode` may already be linked, in which case we don't want
        // to break the links which i18n created.
        currentTNode.next = tNode;
        tNode.prev = currentTNode;
      }
    }
  }
  return tNode;
}

/**
 * When elements are created dynamically after a view blueprint is created (e.g. through
 * i18nApply()), we need to adjust the blueprint for future
 * template passes.
 *
 * @param tView `TView` associated with `LView`
 * @param lView The `LView` containing the blueprint to adjust
 * @param numSlotsToAlloc The number of slots to alloc in the LView, should be >0
 * @param initialValue Initial value to store in blueprint
 */
export function allocExpando(
    tView: TView, lView: LView, numSlotsToAlloc: number, initialValue: any): number {
  if (numSlotsToAlloc === 0) return -1;
  if (ngDevMode) {
    assertFirstCreatePass(tView);
    assertSame(tView, lView[TVIEW], '`LView` must be associated with `TView`!');
    assertEqual(tView.data.length, lView.length, 'Expecting LView to be same size as TView');
    assertEqual(
        tView.data.length, tView.blueprint.length, 'Expecting Blueprint to be same size as TView');
    assertFirstUpdatePass(tView);
  }
  const allocIdx = lView.length;
  for (let i = 0; i < numSlotsToAlloc; i++) {
    lView.push(initialValue);
    tView.blueprint.push(initialValue);
    tView.data.push(null);
  }
  return allocIdx;
}

export function executeTemplate<T>(
    tView: TView, lView: LView<T>, templateFn: ComponentTemplate<T>, rf: RenderFlags, context: T) {
  const consumer = getReactiveLViewConsumer(lView, REACTIVE_TEMPLATE_CONSUMER);
  const prevSelectedIndex = getSelectedIndex();
  const isUpdatePhase = rf & RenderFlags.Update;
  try {
    setSelectedIndex(-1);
    if (isUpdatePhase && lView.length > HEADER_OFFSET) {
      // When we're updating, inherently select 0 so we don't
      // have to generate that instruction for most update blocks.
      selectIndexInternal(tView, lView, HEADER_OFFSET, !!ngDevMode && isInCheckNoChangesMode());
    }

    const preHookType =
        isUpdatePhase ? ProfilerEvent.TemplateUpdateStart : ProfilerEvent.TemplateCreateStart;
    profiler(preHookType, context as unknown as {});
    const effectiveConsumer = isUpdatePhase ? consumer : null;
    const prevConsumer = consumerBeforeComputation(effectiveConsumer);
    try {
      if (effectiveConsumer !== null) {
        effectiveConsumer.dirty = false;
      }
      templateFn(rf, context);
    } finally {
      consumerAfterComputation(effectiveConsumer, prevConsumer);
    }
  } finally {
    setSelectedIndex(prevSelectedIndex);

    const postHookType =
        isUpdatePhase ? ProfilerEvent.TemplateUpdateEnd : ProfilerEvent.TemplateCreateEnd;
    profiler(postHookType, context as unknown as {});
  }
}

//////////////////////////
//// Element
//////////////////////////

export function executeContentQueries(tView: TView, tNode: TNode, lView: LView) {
  if (isContentQueryHost(tNode)) {
    const prevConsumer = setActiveConsumer(null);
    try {
      const start = tNode.directiveStart;
      const end = tNode.directiveEnd;
      for (let directiveIndex = start; directiveIndex < end; directiveIndex++) {
        const def = tView.data[directiveIndex] as DirectiveDef<any>;
        if (def.contentQueries) {
          def.contentQueries(RenderFlags.Create, lView[directiveIndex], directiveIndex);
        }
      }
    } finally {
      setActiveConsumer(prevConsumer);
    }
  }
}


/**
 * Creates directive instances.
 */
export function createDirectivesInstances(tView: TView, lView: LView, tNode: TDirectiveHostNode) {
  if (!getBindingsEnabled()) return;
  instantiateAllDirectives(tView, lView, tNode, getNativeByTNode(tNode, lView));
  if ((tNode.flags & TNodeFlags.hasHostBindings) === TNodeFlags.hasHostBindings) {
    invokeDirectivesHostBindings(tView, lView, tNode);
  }
}

/**
 * Takes a list of local names and indices and pushes the resolved local variable values
 * to LView in the same order as they are loaded in the template with load().
 */
export function saveResolvedLocalsInData(
    viewData: LView, tNode: TDirectiveHostNode,
    localRefExtractor: LocalRefExtractor = getNativeByTNode): void {
  const localNames = tNode.localNames;
  if (localNames !== null) {
    let localIndex = tNode.index + 1;
    for (let i = 0; i < localNames.length; i += 2) {
      const index = localNames[i + 1] as number;
      const value = index === -1 ?
          localRefExtractor(
              tNode as TElementNode | TContainerNode | TElementContainerNode, viewData) :
          viewData[index];
      viewData[localIndex++] = value;
    }
  }
}

/**
 * Gets TView from a template function or creates a new TView
 * if it doesn't already exist.
 *
 * @param def ComponentDef
 * @returns TView
 */
export function getOrCreateComponentTView(def: ComponentDef<any>): TView {
  const tView = def.tView;

  // Create a TView if there isn't one, or recreate it if the first create pass didn't
  // complete successfully since we can't know for sure whether it's in a usable shape.
  if (tView === null || tView.incompleteFirstPass) {
    // Declaration node here is null since this function is called when we dynamically create a
    // component and hence there is no declaration.
    const declTNode = null;
    return def.tView = createTView(
               TViewType.Component, declTNode, def.template, def.decls, def.vars, def.directiveDefs,
               def.pipeDefs, def.viewQuery, def.schemas, def.consts, def.id);
  }

  return tView;
}


/**
 * Creates a TView instance
 *
 * @param type Type of `TView`.
 * @param declTNode Declaration location of this `TView`.
 * @param templateFn Template function
 * @param decls The number of nodes, local refs, and pipes in this template
 * @param directives Registry of directives for this view
 * @param pipes Registry of pipes for this view
 * @param viewQuery View queries for this view
 * @param schemas Schemas for this view
 * @param consts Constants for this view
 */
export function createTView(
    type: TViewType, declTNode: TNode|null, templateFn: ComponentTemplate<any>|null, decls: number,
    vars: number, directives: DirectiveDefListOrFactory|null, pipes: PipeDefListOrFactory|null,
    viewQuery: ViewQueriesFunction<any>|null, schemas: SchemaMetadata[]|null,
    constsOrFactory: TConstantsOrFactory|null, ssrId: string|null): TView {
  ngDevMode && ngDevMode.tView++;
  const bindingStartIndex = HEADER_OFFSET + decls;
  // This length does not yet contain host bindings from child directives because at this point,
  // we don't know which directives are active on this template. As soon as a directive is matched
  // that has a host binding, we will update the blueprint with that def's hostVars count.
  const initialViewLength = bindingStartIndex + vars;
  const blueprint = createViewBlueprint(bindingStartIndex, initialViewLength);
  const consts = typeof constsOrFactory === 'function' ? constsOrFactory() : constsOrFactory;
  const tView = blueprint[TVIEW as any] = {
    type: type,
    blueprint: blueprint,
    template: templateFn,
    queries: null,
    viewQuery: viewQuery,
    declTNode: declTNode,
    data: blueprint.slice().fill(null, bindingStartIndex),
    bindingStartIndex: bindingStartIndex,
    expandoStartIndex: initialViewLength,
    hostBindingOpCodes: null,
    firstCreatePass: true,
    firstUpdatePass: true,
    staticViewQueries: false,
    staticContentQueries: false,
    preOrderHooks: null,
    preOrderCheckHooks: null,
    contentHooks: null,
    contentCheckHooks: null,
    viewHooks: null,
    viewCheckHooks: null,
    destroyHooks: null,
    cleanup: null,
    contentQueries: null,
    components: null,
    directiveRegistry: typeof directives === 'function' ? directives() : directives,
    pipeRegistry: typeof pipes === 'function' ? pipes() : pipes,
    firstChild: null,
    schemas: schemas,
    consts: consts,
    incompleteFirstPass: false,
    ssrId,
  };
  if (ngDevMode) {
    // For performance reasons it is important that the tView retains the same shape during runtime.
    // (To make sure that all of the code is monomorphic.) For this reason we seal the object to
    // prevent class transitions.
    Object.seal(tView);
  }
  return tView;
}

function createViewBlueprint(bindingStartIndex: number, initialViewLength: number): LView {
  const blueprint = [];

  for (let i = 0; i < initialViewLength; i++) {
    blueprint.push(i < bindingStartIndex ? null : NO_CHANGE);
  }

  return blueprint as LView;
}

/**
 * Locates the host native element, used for bootstrapping existing nodes into rendering pipeline.
 *
 * @param renderer the renderer used to locate the element.
 * @param elementOrSelector Render element or CSS selector to locate the element.
 * @param encapsulation View Encapsulation defined for component that requests host element.
 * @param injector Root view injector instance.
 */
export function locateHostElement(
    renderer: Renderer, elementOrSelector: RElement|string, encapsulation: ViewEncapsulation,
    injector: Injector): RElement {
  // Note: we use default value for the `PRESERVE_HOST_CONTENT` here even though it's a
  // tree-shakable one (providedIn:'root'). This code path can be triggered during dynamic
  // component creation (after calling ViewContainerRef.createComponent) when an injector
  // instance can be provided. The injector instance might be disconnected from the main DI
  // tree, thus the `PRESERVE_HOST_CONTENT` would not be able to instantiate. In this case, the
  // default value will be used.
  const preserveHostContent = injector.get(PRESERVE_HOST_CONTENT, PRESERVE_HOST_CONTENT_DEFAULT);

  // When using native Shadow DOM, do not clear host element to allow native slot
  // projection.
  const preserveContent = preserveHostContent || encapsulation === ViewEncapsulation.ShadowDom;
  const rootElement = renderer.selectRootElement(elementOrSelector, preserveContent);
  applyRootElementTransform(rootElement as HTMLElement);
  return rootElement;
}

/**
 * Applies any root element transformations that are needed. If hydration is enabled,
 * this will process corrupted text nodes.
 *
 * @param rootElement the app root HTML Element
 */
export function applyRootElementTransform(rootElement: HTMLElement) {
  _applyRootElementTransformImpl(rootElement as HTMLElement);
}

/**
 * Reference to a function that applies transformations to the root HTML element
 * of an app. When hydration is enabled, this processes any corrupt text nodes
 * so they are properly hydratable on the client.
 *
 * @param rootElement the app root HTML Element
 */
let _applyRootElementTransformImpl: typeof applyRootElementTransformImpl =
    (rootElement: HTMLElement) => null;

/**
 * Processes text node markers before hydration begins. This replaces any special comment
 * nodes that were added prior to serialization are swapped out to restore proper text
 * nodes before hydration.
 *
 * @param rootElement the app root HTML Element
 */
export function applyRootElementTransformImpl(rootElement: HTMLElement) {
  if (hasSkipHydrationAttrOnRElement(rootElement)) {
    // Handle a situation when the `ngSkipHydration` attribute is applied
    // to the root node of an application. In this case, we should clear
    // the contents and render everything from scratch.
    clearElementContents(rootElement as RElement);
  } else {
    processTextNodeMarkersBeforeHydration(rootElement);
  }
}

/**
 * Sets the implementation for the `applyRootElementTransform` function.
 */
export function enableApplyRootElementTransformImpl() {
  _applyRootElementTransformImpl = applyRootElementTransformImpl;
}

/**
 * Saves context for this cleanup function in LView.cleanupInstances.
 *
 * On the first template pass, saves in TView:
 * - Cleanup function
 * - Index of context we just saved in LView.cleanupInstances
 */
export function storeCleanupWithContext(
    tView: TView, lView: LView, context: any, cleanupFn: Function): void {
  const lCleanup = getOrCreateLViewCleanup(lView);

  // Historically the `storeCleanupWithContext` was used to register both framework-level and
  // user-defined cleanup callbacks, but over time those two types of cleanups were separated.
  // This dev mode checks assures that user-level cleanup callbacks are _not_ stored in data
  // structures reserved for framework-specific hooks.
  ngDevMode &&
      assertDefined(
          context, 'Cleanup context is mandatory when registering framework-level destroy hooks');
  lCleanup.push(context);

  if (tView.firstCreatePass) {
    getOrCreateTViewCleanup(tView).push(cleanupFn, lCleanup.length - 1);
  } else {
    // Make sure that no new framework-level cleanup functions are registered after the first
    // template pass is done (and TView data structures are meant to fully constructed).
    if (ngDevMode) {
      Object.freeze(getOrCreateTViewCleanup(tView));
    }
  }
}

/**
 * Constructs a TNode object from the arguments.
 *
 * @param tView `TView` to which this `TNode` belongs
 * @param tParent Parent `TNode`
 * @param type The type of the node
 * @param index The index of the TNode in TView.data, adjusted for HEADER_OFFSET
 * @param tagName The tag name of the node
 * @param attrs The attributes defined on this node
 * @returns the TNode object
 */
export function createTNode(
    tView: TView, tParent: TElementNode|TContainerNode|null, type: TNodeType.Container,
    index: number, tagName: string|null, attrs: TAttributes|null): TContainerNode;
export function createTNode(
    tView: TView, tParent: TElementNode|TContainerNode|null, type: TNodeType.Element|TNodeType.Text,
    index: number, tagName: string|null, attrs: TAttributes|null): TElementNode;
export function createTNode(
    tView: TView, tParent: TElementNode|TContainerNode|null, type: TNodeType.ElementContainer,
    index: number, tagName: string|null, attrs: TAttributes|null): TElementContainerNode;
export function createTNode(
    tView: TView, tParent: TElementNode|TContainerNode|null, type: TNodeType.Icu, index: number,
    tagName: string|null, attrs: TAttributes|null): TIcuContainerNode;
export function createTNode(
    tView: TView, tParent: TElementNode|TContainerNode|null, type: TNodeType.Projection,
    index: number, tagName: string|null, attrs: TAttributes|null): TProjectionNode;
export function createTNode(
    tView: TView, tParent: TElementNode|TContainerNode|null, type: TNodeType, index: number,
    tagName: string|null, attrs: TAttributes|null): TNode;
export function createTNode(
    tView: TView, tParent: TElementNode|TContainerNode|null, type: TNodeType, index: number,
    value: string|null, attrs: TAttributes|null): TNode {
  ngDevMode && index !== 0 &&  // 0 are bogus nodes and they are OK. See `createContainerRef` in
                               // `view_engine_compatibility` for additional context.
      assertGreaterThanOrEqual(index, HEADER_OFFSET, 'TNodes can\'t be in the LView header.');
  ngDevMode && assertNotSame(attrs, undefined, '\'undefined\' is not valid value for \'attrs\'');
  ngDevMode && ngDevMode.tNode++;
  ngDevMode && tParent && assertTNodeForTView(tParent, tView);
  let injectorIndex = tParent ? tParent.injectorIndex : -1;
  let flags = 0;
  if (isInSkipHydrationBlock()) {
    flags |= TNodeFlags.inSkipHydrationBlock;
  }
  const tNode = {
    type,
    index,
    insertBeforeIndex: null,
    injectorIndex,
    directiveStart: -1,
    directiveEnd: -1,
    directiveStylingLast: -1,
    componentOffset: -1,
    propertyBindings: null,
    flags,
    providerIndexes: 0,
    value: value,
    attrs: attrs,
    mergedAttrs: null,
    localNames: null,
    initialInputs: undefined,
    inputs: null,
    outputs: null,
    tView: null,
    next: null,
    prev: null,
    projectionNext: null,
    child: null,
    parent: tParent,
    projection: null,
    styles: null,
    stylesWithoutHost: null,
    residualStyles: undefined,
    classes: null,
    classesWithoutHost: null,
    residualClasses: undefined,
    classBindings: 0 as any,
    styleBindings: 0 as any,
  };
  if (ngDevMode) {
    // For performance reasons it is important that the tNode retains the same shape during runtime.
    // (To make sure that all of the code is monomorphic.) For this reason we seal the object to
    // prevent class transitions.
    Object.seal(tNode);
  }
  return tNode;
}

/**
 * Generates the `PropertyAliases` data structure from the provided input/output mapping.
 * @param aliasMap Input/output mapping from the directive definition.
 * @param directiveIndex Index of the directive.
 * @param propertyAliases Object in which to store the results.
 * @param hostDirectiveAliasMap Object used to alias or filter out properties for host directives.
 * If the mapping is provided, it'll act as an allowlist, as well as a mapping of what public
 * name inputs/outputs should be exposed under.
 */
function generatePropertyAliases(
    aliasMap: {[publicName: string]: string}, directiveIndex: number,
    propertyAliases: PropertyAliases|null,
    hostDirectiveAliasMap: HostDirectiveBindingMap|null): PropertyAliases|null {
  for (let publicName in aliasMap) {
    if (aliasMap.hasOwnProperty(publicName)) {
      propertyAliases = propertyAliases === null ? {} : propertyAliases;
      const internalName = aliasMap[publicName];

      // If there are no host directive mappings, we want to remap using the alias map from the
      // definition itself. If there is an alias map, it has two functions:
      // 1. It serves as an allowlist of bindings that are exposed by the host directives. Only the
      // ones inside the host directive map will be exposed on the host.
      // 2. The public name of the property is aliased using the host directive alias map, rather
      // than the alias map from the definition.
      if (hostDirectiveAliasMap === null) {
        addPropertyAlias(propertyAliases, directiveIndex, publicName, internalName);
      } else if (hostDirectiveAliasMap.hasOwnProperty(publicName)) {
        addPropertyAlias(
            propertyAliases, directiveIndex, hostDirectiveAliasMap[publicName], internalName);
      }
    }
  }
  return propertyAliases;
}

function addPropertyAlias(
    propertyAliases: PropertyAliases, directiveIndex: number, publicName: string,
    internalName: string) {
  if (propertyAliases.hasOwnProperty(publicName)) {
    propertyAliases[publicName].push(directiveIndex, internalName);
  } else {
    propertyAliases[publicName] = [directiveIndex, internalName];
  }
}

/**
 * Initializes data structures required to work with directive inputs and outputs.
 * Initialization is done for all directives matched on a given TNode.
 */
function initializeInputAndOutputAliases(
    tView: TView, tNode: TNode, hostDirectiveDefinitionMap: HostDirectiveDefs|null): void {
  ngDevMode && assertFirstCreatePass(tView);

  const start = tNode.directiveStart;
  const end = tNode.directiveEnd;
  const tViewData = tView.data;

  const tNodeAttrs = tNode.attrs;
  const inputsFromAttrs: InitialInputData = [];
  let inputsStore: PropertyAliases|null = null;
  let outputsStore: PropertyAliases|null = null;

  for (let directiveIndex = start; directiveIndex < end; directiveIndex++) {
    const directiveDef = tViewData[directiveIndex] as DirectiveDef<any>;
    const aliasData =
        hostDirectiveDefinitionMap ? hostDirectiveDefinitionMap.get(directiveDef) : null;
    const aliasedInputs = aliasData ? aliasData.inputs : null;
    const aliasedOutputs = aliasData ? aliasData.outputs : null;

    inputsStore =
        generatePropertyAliases(directiveDef.inputs, directiveIndex, inputsStore, aliasedInputs);
    outputsStore =
        generatePropertyAliases(directiveDef.outputs, directiveIndex, outputsStore, aliasedOutputs);
    // Do not use unbound attributes as inputs to structural directives, since structural
    // directive inputs can only be set using microsyntax (e.g. `<div *dir="exp">`).
    // TODO(FW-1930): microsyntax expressions may also contain unbound/static attributes, which
    // should be set for inline templates.
    const initialInputs =
        (inputsStore !== null && tNodeAttrs !== null && !isInlineTemplate(tNode)) ?
        generateInitialInputs(inputsStore, directiveIndex, tNodeAttrs) :
        null;
    inputsFromAttrs.push(initialInputs);
  }

  if (inputsStore !== null) {
    if (inputsStore.hasOwnProperty('class')) {
      tNode.flags |= TNodeFlags.hasClassInput;
    }
    if (inputsStore.hasOwnProperty('style')) {
      tNode.flags |= TNodeFlags.hasStyleInput;
    }
  }

  tNode.initialInputs = inputsFromAttrs;
  tNode.inputs = inputsStore;
  tNode.outputs = outputsStore;
}

/**
 * Mapping between attributes names that don't correspond to their element property names.
 *
 * Performance note: this function is written as a series of if checks (instead of, say, a property
 * object lookup) for performance reasons - the series of `if` checks seems to be the fastest way of
 * mapping property names. Do NOT change without benchmarking.
 *
 * Note: this mapping has to be kept in sync with the equally named mapping in the template
 * type-checking machinery of ngtsc.
 */
function mapPropName(name: string): string {
  if (name === 'class') return 'className';
  if (name === 'for') return 'htmlFor';
  if (name === 'formaction') return 'formAction';
  if (name === 'innerHtml') return 'innerHTML';
  if (name === 'readonly') return 'readOnly';
  if (name === 'tabindex') return 'tabIndex';
  return name;
}

export function elementPropertyInternal<T>(
    tView: TView, tNode: TNode, lView: LView, propName: string, value: T, renderer: Renderer,
    sanitizer: SanitizerFn|null|undefined, nativeOnly: boolean): void {
  ngDevMode && assertNotSame(value, NO_CHANGE as any, 'Incoming value should never be NO_CHANGE.');
  const element = getNativeByTNode(tNode, lView) as RElement | RComment;
  let inputData = tNode.inputs;
  let dataValue: PropertyAliasValue|undefined;
  if (!nativeOnly && inputData != null && (dataValue = inputData[propName])) {
    setInputsForProperty(tView, lView, dataValue, propName, value);
    if (isComponentHost(tNode)) markDirtyIfOnPush(lView, tNode.index);
    if (ngDevMode) {
      setNgReflectProperties(lView, element, tNode.type, dataValue, value);
    }
  } else if (tNode.type & TNodeType.AnyRNode) {
    propName = mapPropName(propName);

    if (ngDevMode) {
      validateAgainstEventProperties(propName);
      if (!isPropertyValid(element, propName, tNode.value, tView.schemas)) {
        handleUnknownPropertyError(propName, tNode.value, tNode.type, lView);
      }
      ngDevMode.rendererSetProperty++;
    }

    // It is assumed that the sanitizer is only added when the compiler determines that the
    // property is risky, so sanitization can be done without further checks.
    value = sanitizer != null ? (sanitizer(value, tNode.value || '', propName) as any) : value;
    renderer.setProperty(element as RElement, propName, value);
  } else if (tNode.type & TNodeType.AnyContainer) {
    // If the node is a container and the property didn't
    // match any of the inputs or schemas we should throw.
    if (ngDevMode && !matchingSchemas(tView.schemas, tNode.value)) {
      handleUnknownPropertyError(propName, tNode.value, tNode.type, lView);
    }
  }
}

/** If node is an OnPush component, marks its LView dirty. */
export function markDirtyIfOnPush(lView: LView, viewIndex: number): void {
  ngDevMode && assertLView(lView);
  const childComponentLView = getComponentLViewByIndex(viewIndex, lView);
  if (!(childComponentLView[FLAGS] & LViewFlags.CheckAlways)) {
    childComponentLView[FLAGS] |= LViewFlags.Dirty;
  }
}

function setNgReflectProperty(
    lView: LView, element: RElement|RComment, type: TNodeType, attrName: string, value: any) {
  const renderer = lView[RENDERER];
  attrName = normalizeDebugBindingName(attrName);
  const debugValue = normalizeDebugBindingValue(value);
  if (type & TNodeType.AnyRNode) {
    if (value == null) {
      renderer.removeAttribute((element as RElement), attrName);
    } else {
      renderer.setAttribute((element as RElement), attrName, debugValue);
    }
  } else {
    const textContent =
        escapeCommentText(`bindings=${JSON.stringify({[attrName]: debugValue}, null, 2)}`);
    renderer.setValue((element as RComment), textContent);
  }
}

export function setNgReflectProperties(
    lView: LView, element: RElement|RComment, type: TNodeType, dataValue: PropertyAliasValue,
    value: any) {
  if (type & (TNodeType.AnyRNode | TNodeType.Container)) {
    /**
     * dataValue is an array containing runtime input or output names for the directives:
     * i+0: directive instance index
     * i+1: privateName
     *
     * e.g. [0, 'change', 'change-minified']
     * we want to set the reflected property with the privateName: dataValue[i+1]
     */
    for (let i = 0; i < dataValue.length; i += 2) {
      setNgReflectProperty(lView, element, type, dataValue[i + 1] as string, value);
    }
  }
}

/**
 * Resolve the matched directives on a node.
 */
export function resolveDirectives(
    tView: TView, lView: LView, tNode: TElementNode|TContainerNode|TElementContainerNode,
    localRefs: string[]|null): void {
  // Please make sure to have explicit type for `exportsMap`. Inferred type triggers bug in
  // tsickle.
  ngDevMode && assertFirstCreatePass(tView);

  if (getBindingsEnabled()) {
    const exportsMap: ({[key: string]: number}|null) = localRefs === null ? null : {'': -1};
    const matchResult = findDirectiveDefMatches(tView, tNode);
    let directiveDefs: DirectiveDef<unknown>[]|null;
    let hostDirectiveDefs: HostDirectiveDefs|null;

    if (matchResult === null) {
      directiveDefs = hostDirectiveDefs = null;
    } else {
      [directiveDefs, hostDirectiveDefs] = matchResult;
    }

    if (directiveDefs !== null) {
      initializeDirectives(tView, lView, tNode, directiveDefs, exportsMap, hostDirectiveDefs);
    }
    if (exportsMap) cacheMatchingLocalNames(tNode, localRefs, exportsMap);
  }
  // Merge the template attrs last so that they have the highest priority.
  tNode.mergedAttrs = mergeHostAttrs(tNode.mergedAttrs, tNode.attrs);
}

/** Initializes the data structures necessary for a list of directives to be instantiated. */
export function initializeDirectives(
    tView: TView, lView: LView<unknown>, tNode: TElementNode|TContainerNode|TElementContainerNode,
    directives: DirectiveDef<unknown>[], exportsMap: {[key: string]: number;}|null,
    hostDirectiveDefs: HostDirectiveDefs|null) {
  ngDevMode && assertFirstCreatePass(tView);

  // Publishes the directive types to DI so they can be injected. Needs to
  // happen in a separate pass before the TNode flags have been initialized.
  for (let i = 0; i < directives.length; i++) {
    diPublicInInjector(getOrCreateNodeInjectorForNode(tNode, lView), tView, directives[i].type);
  }

  initTNodeFlags(tNode, tView.data.length, directives.length);

  // When the same token is provided by several directives on the same node, some rules apply in
  // the viewEngine:
  // - viewProviders have priority over providers
  // - the last directive in NgModule.declarations has priority over the previous one
  // So to match these rules, the order in which providers are added in the arrays is very
  // important.
  for (let i = 0; i < directives.length; i++) {
    const def = directives[i];
    if (def.providersResolver) def.providersResolver(def);
  }
  let preOrderHooksFound = false;
  let preOrderCheckHooksFound = false;
  let directiveIdx = allocExpando(tView, lView, directives.length, null);
  ngDevMode &&
      assertSame(
          directiveIdx, tNode.directiveStart,
          'TNode.directiveStart should point to just allocated space');

  for (let i = 0; i < directives.length; i++) {
    const def = directives[i];
    // Merge the attrs in the order of matches. This assumes that the first directive is the
    // component itself, so that the component has the least priority.
    tNode.mergedAttrs = mergeHostAttrs(tNode.mergedAttrs, def.hostAttrs);

    configureViewWithDirective(tView, tNode, lView, directiveIdx, def);
    saveNameToExportMap(directiveIdx, def, exportsMap);

    if (def.contentQueries !== null) tNode.flags |= TNodeFlags.hasContentQuery;
    if (def.hostBindings !== null || def.hostAttrs !== null || def.hostVars !== 0)
      tNode.flags |= TNodeFlags.hasHostBindings;

    const lifeCycleHooks: Partial<OnChanges&OnInit&DoCheck> = def.type.prototype;
    // Only push a node index into the preOrderHooks array if this is the first
    // pre-order hook found on this node.
    if (!preOrderHooksFound &&
        (lifeCycleHooks.ngOnChanges || lifeCycleHooks.ngOnInit || lifeCycleHooks.ngDoCheck)) {
      // We will push the actual hook function into this array later during dir instantiation.
      // We cannot do it now because we must ensure hooks are registered in the same
      // order that directives are created (i.e. injection order).
      (tView.preOrderHooks ??= []).push(tNode.index);
      preOrderHooksFound = true;
    }

    if (!preOrderCheckHooksFound && (lifeCycleHooks.ngOnChanges || lifeCycleHooks.ngDoCheck)) {
      (tView.preOrderCheckHooks ??= []).push(tNode.index);
      preOrderCheckHooksFound = true;
    }

    directiveIdx++;
  }

  initializeInputAndOutputAliases(tView, tNode, hostDirectiveDefs);
}

/**
 * Add `hostBindings` to the `TView.hostBindingOpCodes`.
 *
 * @param tView `TView` to which the `hostBindings` should be added.
 * @param tNode `TNode` the element which contains the directive
 * @param directiveIdx Directive index in view.
 * @param directiveVarsIdx Where will the directive's vars be stored
 * @param def `ComponentDef`/`DirectiveDef`, which contains the `hostVars`/`hostBindings` to add.
 */
export function registerHostBindingOpCodes(
    tView: TView, tNode: TNode, directiveIdx: number, directiveVarsIdx: number,
    def: ComponentDef<any>|DirectiveDef<any>): void {
  ngDevMode && assertFirstCreatePass(tView);

  const hostBindings = def.hostBindings;
  if (hostBindings) {
    let hostBindingOpCodes = tView.hostBindingOpCodes;
    if (hostBindingOpCodes === null) {
      hostBindingOpCodes = tView.hostBindingOpCodes = [] as any as HostBindingOpCodes;
    }
    const elementIndx = ~tNode.index;
    if (lastSelectedElementIdx(hostBindingOpCodes) != elementIndx) {
      // Conditionally add select element so that we are more efficient in execution.
      // NOTE: this is strictly not necessary and it trades code size for runtime perf.
      // (We could just always add it.)
      hostBindingOpCodes.push(elementIndx);
    }
    hostBindingOpCodes.push(directiveIdx, directiveVarsIdx, hostBindings);
  }
}

/**
 * Returns the last selected element index in the `HostBindingOpCodes`
 *
 * For perf reasons we don't need to update the selected element index in `HostBindingOpCodes` only
 * if it changes. This method returns the last index (or '0' if not found.)
 *
 * Selected element index are only the ones which are negative.
 */
function lastSelectedElementIdx(hostBindingOpCodes: HostBindingOpCodes): number {
  let i = hostBindingOpCodes.length;
  while (i > 0) {
    const value = hostBindingOpCodes[--i];
    if (typeof value === 'number' && value < 0) {
      return value;
    }
  }
  return 0;
}


/**
 * Instantiate all the directives that were previously resolved on the current node.
 */
function instantiateAllDirectives(
    tView: TView, lView: LView, tNode: TDirectiveHostNode, native: RNode) {
  const start = tNode.directiveStart;
  const end = tNode.directiveEnd;

  // The component view needs to be created before creating the node injector
  // since it is used to inject some special symbols like `ChangeDetectorRef`.
  if (isComponentHost(tNode)) {
    ngDevMode && assertTNodeType(tNode, TNodeType.AnyRNode);
    addComponentLogic(
        lView, tNode as TElementNode,
        tView.data[start + tNode.componentOffset] as ComponentDef<unknown>);
  }

  if (!tView.firstCreatePass) {
    getOrCreateNodeInjectorForNode(tNode, lView);
  }

  attachPatchData(native, lView);

  const initialInputs = tNode.initialInputs;
  for (let i = start; i < end; i++) {
    const def = tView.data[i] as DirectiveDef<any>;
    const directive = getNodeInjectable(lView, tView, i, tNode);
    attachPatchData(directive, lView);

    if (initialInputs !== null) {
      setInputsFromAttrs(lView, i - start, directive, def, tNode, initialInputs!);
    }

    if (isComponentDef(def)) {
      const componentView = getComponentLViewByIndex(tNode.index, lView);
      componentView[CONTEXT] = getNodeInjectable(lView, tView, i, tNode);
    }
  }
}

export function invokeDirectivesHostBindings(tView: TView, lView: LView, tNode: TNode) {
  const start = tNode.directiveStart;
  const end = tNode.directiveEnd;
  const elementIndex = tNode.index;
  const currentDirectiveIndex = getCurrentDirectiveIndex();
  try {
    setSelectedIndex(elementIndex);
    for (let dirIndex = start; dirIndex < end; dirIndex++) {
      const def = tView.data[dirIndex] as DirectiveDef<unknown>;
      const directive = lView[dirIndex];
      setCurrentDirectiveIndex(dirIndex);
      if (def.hostBindings !== null || def.hostVars !== 0 || def.hostAttrs !== null) {
        invokeHostBindingsInCreationMode(def, directive);
      }
    }
  } finally {
    setSelectedIndex(-1);
    setCurrentDirectiveIndex(currentDirectiveIndex);
  }
}

/**
 * Invoke the host bindings in creation mode.
 *
 * @param def `DirectiveDef` which may contain the `hostBindings` function.
 * @param directive Instance of directive.
 */
export function invokeHostBindingsInCreationMode(def: DirectiveDef<any>, directive: any) {
  if (def.hostBindings !== null) {
    def.hostBindings!(RenderFlags.Create, directive);
  }
}

/**
 * Matches the current node against all available selectors.
 * If a component is matched (at most one), it is returned in first position in the array.
 */
function findDirectiveDefMatches(
    tView: TView, tNode: TElementNode|TContainerNode|TElementContainerNode):
    [matches: DirectiveDef<unknown>[], hostDirectiveDefs: HostDirectiveDefs|null]|null {
  ngDevMode && assertFirstCreatePass(tView);
  ngDevMode && assertTNodeType(tNode, TNodeType.AnyRNode | TNodeType.AnyContainer);

  const registry = tView.directiveRegistry;
  let matches: DirectiveDef<unknown>[]|null = null;
  let hostDirectiveDefs: HostDirectiveDefs|null = null;
  if (registry) {
    for (let i = 0; i < registry.length; i++) {
      const def = registry[i] as ComponentDef<any>| DirectiveDef<any>;
      if (isNodeMatchingSelectorList(tNode, def.selectors!, /* isProjectionMode */ false)) {
        matches || (matches = []);

        if (isComponentDef(def)) {
          if (ngDevMode) {
            assertTNodeType(
                tNode, TNodeType.Element,
                `"${tNode.value}" tags cannot be used as component hosts. ` +
                    `Please use a different tag to activate the ${stringify(def.type)} component.`);

            if (isComponentHost(tNode)) {
              throwMultipleComponentError(tNode, matches.find(isComponentDef)!.type, def.type);
            }
          }

          // Components are inserted at the front of the matches array so that their lifecycle
          // hooks run before any directive lifecycle hooks. This appears to be for ViewEngine
          // compatibility. This logic doesn't make sense with host directives, because it
          // would allow the host directives to undo any overrides the host may have made.
          // To handle this case, the host directives of components are inserted at the beginning
          // of the array, followed by the component. As such, the insertion order is as follows:
          // 1. Host directives belonging to the selector-matched component.
          // 2. Selector-matched component.
          // 3. Host directives belonging to selector-matched directives.
          // 4. Selector-matched directives.
          if (def.findHostDirectiveDefs !== null) {
            const hostDirectiveMatches: DirectiveDef<unknown>[] = [];
            hostDirectiveDefs = hostDirectiveDefs || new Map();
            def.findHostDirectiveDefs(def, hostDirectiveMatches, hostDirectiveDefs);
            // Add all host directives declared on this component, followed by the component itself.
            // Host directives should execute first so the host has a chance to override changes
            // to the DOM made by them.
            matches.unshift(...hostDirectiveMatches, def);
            // Component is offset starting from the beginning of the host directives array.
            const componentOffset = hostDirectiveMatches.length;
            markAsComponentHost(tView, tNode, componentOffset);
          } else {
            // No host directives on this component, just add the
            // component def to the beginning of the matches.
            matches.unshift(def);
            markAsComponentHost(tView, tNode, 0);
          }
        } else {
          // Append any host directives to the matches first.
          hostDirectiveDefs = hostDirectiveDefs || new Map();
          def.findHostDirectiveDefs?.(def, matches, hostDirectiveDefs);
          matches.push(def);
        }
      }
    }
  }
  ngDevMode && matches !== null && assertNoDuplicateDirectives(matches);
  return matches === null ? null : [matches, hostDirectiveDefs];
}

/**
 * Marks a given TNode as a component's host. This consists of:
 * - setting the component offset on the TNode.
 * - storing index of component's host element so it will be queued for view refresh during CD.
 */
export function markAsComponentHost(tView: TView, hostTNode: TNode, componentOffset: number): void {
  ngDevMode && assertFirstCreatePass(tView);
  ngDevMode && assertGreaterThan(componentOffset, -1, 'componentOffset must be great than -1');
  hostTNode.componentOffset = componentOffset;
  (tView.components ??= []).push(hostTNode.index);
}

/** Caches local names and their matching directive indices for query and template lookups. */
function cacheMatchingLocalNames(
    tNode: TNode, localRefs: string[]|null, exportsMap: {[key: string]: number}): void {
  if (localRefs) {
    const localNames: (string|number)[] = tNode.localNames = [];

    // Local names must be stored in tNode in the same order that localRefs are defined
    // in the template to ensure the data is loaded in the same slots as their refs
    // in the template (for template queries).
    for (let i = 0; i < localRefs.length; i += 2) {
      const index = exportsMap[localRefs[i + 1]];
      if (index == null)
        throw new RuntimeError(
            RuntimeErrorCode.EXPORT_NOT_FOUND,
            ngDevMode && `Export of name '${localRefs[i + 1]}' not found!`);
      localNames.push(localRefs[i], index);
    }
  }
}

/**
 * Builds up an export map as directives are created, so local refs can be quickly mapped
 * to their directive instances.
 */
function saveNameToExportMap(
    directiveIdx: number, def: DirectiveDef<any>|ComponentDef<any>,
    exportsMap: {[key: string]: number}|null) {
  if (exportsMap) {
    if (def.exportAs) {
      for (let i = 0; i < def.exportAs.length; i++) {
        exportsMap[def.exportAs[i]] = directiveIdx;
      }
    }
    if (isComponentDef(def)) exportsMap[''] = directiveIdx;
  }
}

/**
 * Initializes the flags on the current node, setting all indices to the initial index,
 * the directive count to 0, and adding the isComponent flag.
 * @param index the initial index
 */
export function initTNodeFlags(tNode: TNode, index: number, numberOfDirectives: number) {
  ngDevMode &&
      assertNotEqual(
          numberOfDirectives, tNode.directiveEnd - tNode.directiveStart,
          'Reached the max number of directives');
  tNode.flags |= TNodeFlags.isDirectiveHost;
  // When the first directive is created on a node, save the index
  tNode.directiveStart = index;
  tNode.directiveEnd = index + numberOfDirectives;
  tNode.providerIndexes = index;
}

/**
 * Setup directive for instantiation.
 *
 * We need to create a `NodeInjectorFactory` which is then inserted in both the `Blueprint` as well
 * as `LView`. `TView` gets the `DirectiveDef`.
 *
 * @param tView `TView`
 * @param tNode `TNode`
 * @param lView `LView`
 * @param directiveIndex Index where the directive will be stored in the Expando.
 * @param def `DirectiveDef`
 */
export function configureViewWithDirective<T>(
    tView: TView, tNode: TNode, lView: LView, directiveIndex: number, def: DirectiveDef<T>): void {
  ngDevMode &&
      assertGreaterThanOrEqual(directiveIndex, HEADER_OFFSET, 'Must be in Expando section');
  tView.data[directiveIndex] = def;
  const directiveFactory =
      def.factory || ((def as Writable<DirectiveDef<T>>).factory = getFactoryDef(def.type, true));
  // Even though `directiveFactory` will already be using `ɵɵdirectiveInject` in its generated code,
  // we also want to support `inject()` directly from the directive constructor context so we set
  // `ɵɵdirectiveInject` as the inject implementation here too.
  const nodeInjectorFactory =
      new NodeInjectorFactory(directiveFactory, isComponentDef(def), ɵɵdirectiveInject);
  tView.blueprint[directiveIndex] = nodeInjectorFactory;
  lView[directiveIndex] = nodeInjectorFactory;

  registerHostBindingOpCodes(
      tView, tNode, directiveIndex, allocExpando(tView, lView, def.hostVars, NO_CHANGE), def);
}

function addComponentLogic<T>(lView: LView, hostTNode: TElementNode, def: ComponentDef<T>): void {
  const native = getNativeByTNode(hostTNode, lView) as RElement;
  const tView = getOrCreateComponentTView(def);

  // Only component views should be added to the view tree directly. Embedded views are
  // accessed through their containers because they may be removed / re-added later.
  const rendererFactory = lView[ENVIRONMENT].rendererFactory;
  let lViewFlags = LViewFlags.CheckAlways;
  if (def.signals) {
    lViewFlags = LViewFlags.SignalView;
  } else if (def.onPush) {
    lViewFlags = LViewFlags.Dirty;
  }
  const componentView = addToViewTree(
      lView,
      createLView(
          lView, tView, null, lViewFlags, native, hostTNode as TElementNode, null,
          rendererFactory.createRenderer(native, def), null, null, null));

  // Component view will always be created before any injected LContainers,
  // so this is a regular element, wrap it with the component view
  lView[hostTNode.index] = componentView;
}

export function elementAttributeInternal(
    tNode: TNode, lView: LView, name: string, value: any, sanitizer: SanitizerFn|null|undefined,
    namespace: string|null|undefined) {
  if (ngDevMode) {
    assertNotSame(value, NO_CHANGE as any, 'Incoming value should never be NO_CHANGE.');
    validateAgainstEventAttributes(name);
    assertTNodeType(
        tNode, TNodeType.Element,
        `Attempted to set attribute \`${name}\` on a container node. ` +
            `Host bindings are not valid on ng-container or ng-template.`);
  }
  const element = getNativeByTNode(tNode, lView) as RElement;
  setElementAttribute(lView[RENDERER], element, namespace, tNode.value, name, value, sanitizer);
}

export function setElementAttribute(
    renderer: Renderer, element: RElement, namespace: string|null|undefined, tagName: string|null,
    name: string, value: any, sanitizer: SanitizerFn|null|undefined) {
  if (value == null) {
    ngDevMode && ngDevMode.rendererRemoveAttribute++;
    renderer.removeAttribute(element, name, namespace);
  } else {
    ngDevMode && ngDevMode.rendererSetAttribute++;
    const strValue =
        sanitizer == null ? renderStringify(value) : sanitizer(value, tagName || '', name);


    renderer.setAttribute(element, name, strValue as string, namespace);
  }
}

/**
 * Sets initial input properties on directive instances from attribute data
 *
 * @param lView Current LView that is being processed.
 * @param directiveIndex Index of the directive in directives array
 * @param instance Instance of the directive on which to set the initial inputs
 * @param def The directive def that contains the list of inputs
 * @param tNode The static data for this node
 */
function setInputsFromAttrs<T>(
    lView: LView, directiveIndex: number, instance: T, def: DirectiveDef<T>, tNode: TNode,
    initialInputData: InitialInputData): void {
  const initialInputs: InitialInputs|null = initialInputData![directiveIndex];
  if (initialInputs !== null) {
    for (let i = 0; i < initialInputs.length;) {
      const publicName = initialInputs[i++];
      const privateName = initialInputs[i++];
      const value = initialInputs[i++];

      writeToDirectiveInput<T>(def, instance, publicName, privateName, value);

      if (ngDevMode) {
        const nativeElement = getNativeByTNode(tNode, lView) as RElement;
        setNgReflectProperty(lView, nativeElement, tNode.type, privateName, value);
      }
    }
  }
}

function writeToDirectiveInput<T>(
    def: DirectiveDef<T>, instance: T, publicName: string, privateName: string, value: string) {
  const prevConsumer = setActiveConsumer(null);
  try {
    const inputTransforms = def.inputTransforms;
    if (inputTransforms !== null && inputTransforms.hasOwnProperty(privateName)) {
      value = inputTransforms[privateName].call(instance, value);
    }
    if (def.setInput !== null) {
      def.setInput(instance, value, publicName, privateName);
    } else {
      (instance as any)[privateName] = value;
    }
  } finally {
    setActiveConsumer(prevConsumer);
  }
}

/**
 * Generates initialInputData for a node and stores it in the template's static storage
 * so subsequent template invocations don't have to recalculate it.
 *
 * initialInputData is an array containing values that need to be set as input properties
 * for directives on this node, but only once on creation. We need this array to support
 * the case where you set an @Input property of a directive using attribute-like syntax.
 * e.g. if you have a `name` @Input, you can set it once like this:
 *
 * <my-component name="Bess"></my-component>
 *
 * @param inputs Input alias map that was generated from the directive def inputs.
 * @param directiveIndex Index of the directive that is currently being processed.
 * @param attrs Static attrs on this node.
 */
function generateInitialInputs(
    inputs: PropertyAliases, directiveIndex: number, attrs: TAttributes): InitialInputs|null {
  let inputsToStore: InitialInputs|null = null;
  let i = 0;
  while (i < attrs.length) {
    const attrName = attrs[i];
    if (attrName === AttributeMarker.NamespaceURI) {
      // We do not allow inputs on namespaced attributes.
      i += 4;
      continue;
    } else if (attrName === AttributeMarker.ProjectAs) {
      // Skip over the `ngProjectAs` value.
      i += 2;
      continue;
    }

    // If we hit any other attribute markers, we're done anyway. None of those are valid inputs.
    if (typeof attrName === 'number') break;

    if (inputs.hasOwnProperty(attrName as string)) {
      if (inputsToStore === null) inputsToStore = [];

      // Find the input's public name from the input store. Note that we can be found easier
      // through the directive def, but we want to do it using the inputs store so that it can
      // account for host directive aliases.
      const inputConfig = inputs[attrName as string];
      for (let j = 0; j < inputConfig.length; j += 2) {
        if (inputConfig[j] === directiveIndex) {
          inputsToStore.push(
              attrName as string, inputConfig[j + 1] as string, attrs[i + 1] as string);
          // A directive can't have multiple inputs with the same name so we can break here.
          break;
        }
      }
    }

    i += 2;
  }
  return inputsToStore;
}

//////////////////////////
//// ViewContainer & View
//////////////////////////

/**
 * Creates a LContainer, either from a container instruction, or for a ViewContainerRef.
 *
 * @param hostNative The host element for the LContainer
 * @param hostTNode The host TNode for the LContainer
 * @param currentView The parent view of the LContainer
 * @param native The native comment element
 * @param isForViewContainerRef Optional a flag indicating the ViewContainerRef case
 * @returns LContainer
 */
export function createLContainer(
    hostNative: RElement|RComment|LView, currentView: LView, native: RComment,
    tNode: TNode): LContainer {
  ngDevMode && assertLView(currentView);
  const lContainer: LContainer = [
    hostNative,   // host native
    true,         // Boolean `true` in this position signifies that this is an `LContainer`
    false,        // has transplanted views
    currentView,  // parent
    null,         // next
    tNode,        // t_host
    false,        // has child views to refresh
    native,       // native,
    null,         // view refs
    null,         // moved views
    null,         // dehydrated views
  ];
  ngDevMode &&
      assertEqual(
          lContainer.length, CONTAINER_HEADER_OFFSET,
          'Should allocate correct number of slots for LContainer header.');
  return lContainer;
}

/** Refreshes all content queries declared by directives in a given view */
export function refreshContentQueries(tView: TView, lView: LView): void {
  const contentQueries = tView.contentQueries;
  if (contentQueries !== null) {
    for (let i = 0; i < contentQueries.length; i += 2) {
      const queryStartIdx = contentQueries[i];
      const directiveDefIdx = contentQueries[i + 1];
      if (directiveDefIdx !== -1) {
        const directiveDef = tView.data[directiveDefIdx] as DirectiveDef<any>;
        ngDevMode && assertDefined(directiveDef, 'DirectiveDef not found.');
        ngDevMode &&
            assertDefined(directiveDef.contentQueries, 'contentQueries function should be defined');
        setCurrentQueryIndex(queryStartIdx);
        directiveDef.contentQueries!(RenderFlags.Update, lView[directiveDefIdx], directiveDefIdx);
      }
    }
  }
}

/**
 * Adds LView or LContainer to the end of the current view tree.
 *
 * This structure will be used to traverse through nested views to remove listeners
 * and call onDestroy callbacks.
 *
 * @param lView The view where LView or LContainer should be added
 * @param adjustedHostIndex Index of the view's host node in LView[], adjusted for header
 * @param lViewOrLContainer The LView or LContainer to add to the view tree
 * @returns The state passed in
 */
export function addToViewTree<T extends LView|LContainer>(lView: LView, lViewOrLContainer: T): T {
  // TODO(benlesh/misko): This implementation is incorrect, because it always adds the LContainer
  // to the end of the queue, which means if the developer retrieves the LContainers from RNodes out
  // of order, the change detection will run out of order, as the act of retrieving the the
  // LContainer from the RNode is what adds it to the queue.
  if (lView[CHILD_HEAD]) {
    lView[CHILD_TAIL]![NEXT] = lViewOrLContainer;
  } else {
    lView[CHILD_HEAD] = lViewOrLContainer;
  }
  lView[CHILD_TAIL] = lViewOrLContainer;
  return lViewOrLContainer;
}

///////////////////////////////
//// Change detection
///////////////////////////////

export function executeViewQueryFn<T>(
    flags: RenderFlags, viewQueryFn: ViewQueriesFunction<T>, component: T): void {
  ngDevMode && assertDefined(viewQueryFn, 'View queries function to execute must be defined.');
  setCurrentQueryIndex(0);
  const prevConsumer = setActiveConsumer(null);
  try {
    viewQueryFn(flags, component);
  } finally {
    setActiveConsumer(prevConsumer);
  }
}

///////////////////////////////
//// Bindings & interpolations
///////////////////////////////

/**
 * Stores meta-data for a property binding to be used by TestBed's `DebugElement.properties`.
 *
 * In order to support TestBed's `DebugElement.properties` we need to save, for each binding:
 * - a bound property name;
 * - a static parts of interpolated strings;
 *
 * A given property metadata is saved at the binding's index in the `TView.data` (in other words, a
 * property binding metadata will be stored in `TView.data` at the same index as a bound value in
 * `LView`). Metadata are represented as `INTERPOLATION_DELIMITER`-delimited string with the
 * following format:
 * - `propertyName` for bound properties;
 * - `propertyName�prefix�interpolation_static_part1�..interpolation_static_partN�suffix` for
 * interpolated properties.
 *
 * @param tData `TData` where meta-data will be saved;
 * @param tNode `TNode` that is a target of the binding;
 * @param propertyName bound property name;
 * @param bindingIndex binding index in `LView`
 * @param interpolationParts static interpolation parts (for property interpolations)
 */
export function storePropertyBindingMetadata(
    tData: TData, tNode: TNode, propertyName: string, bindingIndex: number,
    ...interpolationParts: string[]) {
  // Binding meta-data are stored only the first time a given property instruction is processed.
  // Since we don't have a concept of the "first update pass" we need to check for presence of the
  // binding meta-data to decide if one should be stored (or if was stored already).
  if (tData[bindingIndex] === null) {
    if (tNode.inputs == null || !tNode.inputs[propertyName]) {
      const propBindingIdxs = tNode.propertyBindings || (tNode.propertyBindings = []);
      propBindingIdxs.push(bindingIndex);
      let bindingMetadata = propertyName;
      if (interpolationParts.length > 0) {
        bindingMetadata +=
            INTERPOLATION_DELIMITER + interpolationParts.join(INTERPOLATION_DELIMITER);
      }
      tData[bindingIndex] = bindingMetadata;
    }
  }
}

export function getOrCreateLViewCleanup(view: LView): any[] {
  // top level variables should not be exported for performance reasons (PERF_NOTES.md)
  return view[CLEANUP] || (view[CLEANUP] = []);
}

export function getOrCreateTViewCleanup(tView: TView): any[] {
  return tView.cleanup || (tView.cleanup = []);
}

/**
 * There are cases where the sub component's renderer needs to be included
 * instead of the current renderer (see the componentSyntheticHost* instructions).
 */
export function loadComponentRenderer(
    currentDef: DirectiveDef<any>|null, tNode: TNode, lView: LView): Renderer {
  // TODO(FW-2043): the `currentDef` is null when host bindings are invoked while creating root
  // component (see packages/core/src/render3/component.ts). This is not consistent with the process
  // of creating inner components, when current directive index is available in the state. In order
  // to avoid relying on current def being `null` (thus special-casing root component creation), the
  // process of creating root component should be unified with the process of creating inner
  // components.
  if (currentDef === null || isComponentDef(currentDef)) {
    lView = unwrapLView(lView[tNode.index])!;
  }
  return lView[RENDERER];
}

/** Handles an error thrown in an LView. */
export function handleError(lView: LView, error: any): void {
  const injector = lView[INJECTOR];
  const errorHandler = injector ? injector.get(ErrorHandler, null) : null;
  errorHandler && errorHandler.handleError(error);
}

/**
 * Set the inputs of directives at the current node to corresponding value.
 *
 * @param tView The current TView
 * @param lView the `LView` which contains the directives.
 * @param inputs mapping between the public "input" name and privately-known,
 *        possibly minified, property names to write to.
 * @param value Value to set.
 */
export function setInputsForProperty(
    tView: TView, lView: LView, inputs: PropertyAliasValue, publicName: string, value: any): void {
  for (let i = 0; i < inputs.length;) {
    const index = inputs[i++] as number;
    const privateName = inputs[i++] as string;
    const instance = lView[index];
    ngDevMode && assertIndexInRange(lView, index);
    const def = tView.data[index] as DirectiveDef<any>;

    writeToDirectiveInput(def, instance, publicName, privateName, value);
  }
}

/**
 * Updates a text binding at a given index in a given LView.
 */
export function textBindingInternal(lView: LView, index: number, value: string): void {
  ngDevMode && assertString(value, 'Value should be a string');
  ngDevMode && assertNotSame(value, NO_CHANGE as any, 'value should not be NO_CHANGE');
  ngDevMode && assertIndexInRange(lView, index);
  const element = getNativeByIndex(index, lView) as any as RText;
  ngDevMode && assertDefined(element, 'native element should exist');
  updateTextNode(lView[RENDERER], element, value);
}