@angular/core
Version:
Angular - the core framework
204 lines • 35 kB
JavaScript
/**
* @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 { assertDefined, assertIndexInRange } from '../util/assert';
import { assertComponentType } from './assert';
import { readPatchedLView } from './context_discovery';
import { getComponentDef } from './definition';
import { diPublicInInjector, getOrCreateNodeInjectorForNode } from './di';
import { throwProviderNotFoundError } from './errors_di';
import { registerPostOrderHooks } from './hooks';
import { addToViewTree, CLEAN_PROMISE, createLView, createTView, getOrCreateTComponentView, getOrCreateTNode, initTNodeFlags, instantiateRootComponent, invokeHostBindingsInCreationMode, locateHostElement, markAsComponentHost, refreshView, registerHostBindingOpCodes, renderView } from './instructions/shared';
import { domRendererFactory3 } from './interfaces/renderer';
import { CONTEXT, HEADER_OFFSET, TVIEW } from './interfaces/view';
import { writeDirectClass, writeDirectStyle } from './node_manipulation';
import { enterView, getCurrentTNode, leaveView, setSelectedIndex } from './state';
import { computeStaticStyling } from './styling/static_styling';
import { setUpAttributes } from './util/attrs_utils';
import { publishDefaultGlobalUtils } from './util/global_utils';
import { defaultScheduler } from './util/misc_utils';
import { getRootContext } from './util/view_traversal_utils';
// TODO: A hack to not pull in the NullInjector from @angular/core.
export const NULL_INJECTOR = {
get: (token, notFoundValue) => {
throwProviderNotFoundError(token, 'NullInjector');
}
};
/**
* Bootstraps a Component into an existing host element and returns an instance
* of the component.
*
* Use this function to bootstrap a component into the DOM tree. Each invocation
* of this function will create a separate tree of components, injectors and
* change detection cycles and lifetimes. To dynamically insert a new component
* into an existing tree such that it shares the same injection, change detection
* and object lifetime, use {@link ViewContainer#createComponent}.
*
* @param componentType Component to bootstrap
* @param options Optional parameters which control bootstrapping
*/
export function renderComponent(componentType /* Type as workaround for: Microsoft/TypeScript/issues/4881 */, opts = {}) {
ngDevMode && publishDefaultGlobalUtils();
ngDevMode && assertComponentType(componentType);
const rendererFactory = opts.rendererFactory || domRendererFactory3;
const sanitizer = opts.sanitizer || null;
const componentDef = getComponentDef(componentType);
if (componentDef.type != componentType)
componentDef.type = componentType;
// The first index of the first selector is the tag name.
const componentTag = componentDef.selectors[0][0];
const hostRenderer = rendererFactory.createRenderer(null, null);
const hostRNode = locateHostElement(hostRenderer, opts.host || componentTag, componentDef.encapsulation);
const rootFlags = componentDef.onPush ? 64 /* Dirty */ | 512 /* IsRoot */ :
16 /* CheckAlways */ | 512 /* IsRoot */;
const rootContext = createRootContext(opts.scheduler, opts.playerHandler);
const renderer = rendererFactory.createRenderer(hostRNode, componentDef);
const rootTView = createTView(0 /* Root */, null, null, 1, 0, null, null, null, null, null);
const rootView = createLView(null, rootTView, rootContext, rootFlags, null, null, rendererFactory, renderer, null, opts.injector || null);
enterView(rootView);
let component;
try {
if (rendererFactory.begin)
rendererFactory.begin();
const componentView = createRootComponentView(hostRNode, componentDef, rootView, rendererFactory, renderer, sanitizer);
component = createRootComponent(componentView, componentDef, rootView, rootContext, opts.hostFeatures || null);
// create mode pass
renderView(rootTView, rootView, null);
// update mode pass
refreshView(rootTView, rootView, null, null);
}
finally {
leaveView();
if (rendererFactory.end)
rendererFactory.end();
}
return component;
}
/**
* Creates the root component view and the root component node.
*
* @param rNode Render host element.
* @param def ComponentDef
* @param rootView The parent view where the host node is stored
* @param rendererFactory Factory to be used for creating child renderers.
* @param hostRenderer The current renderer
* @param sanitizer The sanitizer, if provided
*
* @returns Component view created
*/
export function createRootComponentView(rNode, def, rootView, rendererFactory, hostRenderer, sanitizer) {
const tView = rootView[TVIEW];
const index = HEADER_OFFSET;
ngDevMode && assertIndexInRange(rootView, index);
rootView[index] = rNode;
// '#host' is added here as we don't know the real host DOM name (we don't want to read it) and at
// the same time we want to communicate the debug `TNode` that this is a special `TNode`
// representing a host element.
const tNode = getOrCreateTNode(tView, index, 2 /* Element */, '#host', null);
const mergedAttrs = tNode.mergedAttrs = def.hostAttrs;
if (mergedAttrs !== null) {
computeStaticStyling(tNode, mergedAttrs, true);
if (rNode !== null) {
setUpAttributes(hostRenderer, rNode, mergedAttrs);
if (tNode.classes !== null) {
writeDirectClass(hostRenderer, rNode, tNode.classes);
}
if (tNode.styles !== null) {
writeDirectStyle(hostRenderer, rNode, tNode.styles);
}
}
}
const viewRenderer = rendererFactory.createRenderer(rNode, def);
const componentView = createLView(rootView, getOrCreateTComponentView(def), null, def.onPush ? 64 /* Dirty */ : 16 /* CheckAlways */, rootView[index], tNode, rendererFactory, viewRenderer, sanitizer || null, null);
if (tView.firstCreatePass) {
diPublicInInjector(getOrCreateNodeInjectorForNode(tNode, rootView), tView, def.type);
markAsComponentHost(tView, tNode);
initTNodeFlags(tNode, rootView.length, 1);
}
addToViewTree(rootView, componentView);
// Store component view at node index, with node as the HOST
return rootView[index] = componentView;
}
/**
* Creates a root component and sets it up with features and host bindings. Shared by
* renderComponent() and ViewContainerRef.createComponent().
*/
export function createRootComponent(componentView, componentDef, rootLView, rootContext, hostFeatures) {
const tView = rootLView[TVIEW];
// Create directive instance with factory() and store at next index in viewData
const component = instantiateRootComponent(tView, rootLView, componentDef);
rootContext.components.push(component);
componentView[CONTEXT] = component;
hostFeatures && hostFeatures.forEach((feature) => feature(component, componentDef));
// We want to generate an empty QueryList for root content queries for backwards
// compatibility with ViewEngine.
if (componentDef.contentQueries) {
const tNode = getCurrentTNode();
ngDevMode && assertDefined(tNode, 'TNode expected');
componentDef.contentQueries(1 /* Create */, component, tNode.directiveStart);
}
const rootTNode = getCurrentTNode();
ngDevMode && assertDefined(rootTNode, 'tNode should have been already created');
if (tView.firstCreatePass &&
(componentDef.hostBindings !== null || componentDef.hostAttrs !== null)) {
setSelectedIndex(rootTNode.index);
const rootTView = rootLView[TVIEW];
registerHostBindingOpCodes(rootTView, rootTNode, rootLView, rootTNode.directiveStart, rootTNode.directiveEnd, componentDef);
invokeHostBindingsInCreationMode(componentDef, component);
}
return component;
}
export function createRootContext(scheduler, playerHandler) {
return {
components: [],
scheduler: scheduler || defaultScheduler,
clean: CLEAN_PROMISE,
playerHandler: playerHandler || null,
flags: 0 /* Empty */
};
}
/**
* Used to enable lifecycle hooks on the root component.
*
* Include this feature when calling `renderComponent` if the root component
* you are rendering has lifecycle hooks defined. Otherwise, the hooks won't
* be called properly.
*
* Example:
*
* ```
* renderComponent(AppComponent, {hostFeatures: [LifecycleHooksFeature]});
* ```
*/
export function LifecycleHooksFeature(component, def) {
const lView = readPatchedLView(component);
ngDevMode && assertDefined(lView, 'LView is required');
const tView = lView[TVIEW];
const tNode = getCurrentTNode();
ngDevMode && assertDefined(tNode, 'TNode is required');
registerPostOrderHooks(tView, tNode);
}
/**
* Wait on component until it is rendered.
*
* This function returns a `Promise` which is resolved when the component's
* change detection is executed. This is determined by finding the scheduler
* associated with the `component`'s render tree and waiting until the scheduler
* flushes. If nothing is scheduled, the function returns a resolved promise.
*
* Example:
* ```
* await whenRendered(myComponent);
* ```
*
* @param component Component to wait upon
* @returns Promise which resolves when the component is rendered.
*/
export function whenRendered(component) {
return getRootContext(component).clean;
}
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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\n// We are temporarily importing the existing viewEngine from core so we can be sure we are\n// correctly implementing its interfaces for backwards compatibility.\nimport {Injector} from '../di/injector';\nimport {Type} from '../interface/type';\nimport {Sanitizer} from '../sanitization/sanitizer';\nimport {assertDefined, assertIndexInRange} from '../util/assert';\n\nimport {assertComponentType} from './assert';\nimport {readPatchedLView} from './context_discovery';\nimport {getComponentDef} from './definition';\nimport {diPublicInInjector, getOrCreateNodeInjectorForNode} from './di';\nimport {throwProviderNotFoundError} from './errors_di';\nimport {registerPostOrderHooks} from './hooks';\nimport {addToViewTree, CLEAN_PROMISE, createLView, createTView, getOrCreateTComponentView, getOrCreateTNode, initTNodeFlags, instantiateRootComponent, invokeHostBindingsInCreationMode, locateHostElement, markAsComponentHost, refreshView, registerHostBindingOpCodes, renderView} from './instructions/shared';\nimport {ComponentDef, ComponentType, RenderFlags} from './interfaces/definition';\nimport {TElementNode, TNodeType} from './interfaces/node';\nimport {PlayerHandler} from './interfaces/player';\nimport {domRendererFactory3, Renderer3, RendererFactory3} from './interfaces/renderer';\nimport {RElement} from './interfaces/renderer_dom';\nimport {CONTEXT, HEADER_OFFSET, LView, LViewFlags, RootContext, RootContextFlags, TVIEW, TViewType} from './interfaces/view';\nimport {writeDirectClass, writeDirectStyle} from './node_manipulation';\nimport {enterView, getCurrentTNode, leaveView, setSelectedIndex} from './state';\nimport {computeStaticStyling} from './styling/static_styling';\nimport {setUpAttributes} from './util/attrs_utils';\nimport {publishDefaultGlobalUtils} from './util/global_utils';\nimport {defaultScheduler} from './util/misc_utils';\nimport {getRootContext} from './util/view_traversal_utils';\n\n\n\n/** Options that control how the component should be bootstrapped. */\nexport interface CreateComponentOptions {\n  /** Which renderer factory to use. */\n  rendererFactory?: RendererFactory3;\n\n  /** A custom sanitizer instance */\n  sanitizer?: Sanitizer;\n\n  /** A custom animation player handler */\n  playerHandler?: PlayerHandler;\n\n  /**\n   * Host element on which the component will be bootstrapped. If not specified,\n   * the component definition's `tag` is used to query the existing DOM for the\n   * element to bootstrap.\n   */\n  host?: RElement|string;\n\n  /** Module injector for the component. If unspecified, the injector will be NULL_INJECTOR. */\n  injector?: Injector;\n\n  /**\n   * List of features to be applied to the created component. Features are simply\n   * functions that decorate a component with a certain behavior.\n   *\n   * Typically, the features in this list are features that cannot be added to the\n   * other features list in the component definition because they rely on other factors.\n   *\n   * Example: `LifecycleHooksFeature` is a function that adds lifecycle hook capabilities\n   * to root components in a tree-shakable way. It cannot be added to the component\n   * features list because there's no way of knowing when the component will be used as\n   * a root component.\n   */\n  hostFeatures?: HostFeature[];\n\n  /**\n   * A function which is used to schedule change detection work in the future.\n   *\n   * When marking components as dirty, it is necessary to schedule the work of\n   * change detection in the future. This is done to coalesce multiple\n   * {@link markDirty} calls into a single changed detection processing.\n   *\n   * The default value of the scheduler is the `requestAnimationFrame` function.\n   *\n   * It is also useful to override this function for testing purposes.\n   */\n  scheduler?: (work: () => void) => void;\n}\n\n/** See CreateComponentOptions.hostFeatures */\ntype HostFeature = (<T>(component: T, componentDef: ComponentDef<T>) => void);\n\n// TODO: A hack to not pull in the NullInjector from @angular/core.\nexport const NULL_INJECTOR: Injector = {\n  get: (token: any, notFoundValue?: any) => {\n    throwProviderNotFoundError(token, 'NullInjector');\n  }\n};\n\n/**\n * Bootstraps a Component into an existing host element and returns an instance\n * of the component.\n *\n * Use this function to bootstrap a component into the DOM tree. Each invocation\n * of this function will create a separate tree of components, injectors and\n * change detection cycles and lifetimes. To dynamically insert a new component\n * into an existing tree such that it shares the same injection, change detection\n * and object lifetime, use {@link ViewContainer#createComponent}.\n *\n * @param componentType Component to bootstrap\n * @param options Optional parameters which control bootstrapping\n */\nexport function renderComponent<T>(\n    componentType: ComponentType<T>|\n    Type<T>/* Type as workaround for: Microsoft/TypeScript/issues/4881 */\n    ,\n    opts: CreateComponentOptions = {}): T {\n  ngDevMode && publishDefaultGlobalUtils();\n  ngDevMode && assertComponentType(componentType);\n\n  const rendererFactory = opts.rendererFactory || domRendererFactory3;\n  const sanitizer = opts.sanitizer || null;\n  const componentDef = getComponentDef<T>(componentType)!;\n  if (componentDef.type != componentType) (componentDef as {type: Type<any>}).type = componentType;\n\n  // The first index of the first selector is the tag name.\n  const componentTag = componentDef.selectors![0]![0] as string;\n  const hostRenderer = rendererFactory.createRenderer(null, null);\n  const hostRNode =\n      locateHostElement(hostRenderer, opts.host || componentTag, componentDef.encapsulation);\n  const rootFlags = componentDef.onPush ? LViewFlags.Dirty | LViewFlags.IsRoot :\n                                          LViewFlags.CheckAlways | LViewFlags.IsRoot;\n  const rootContext = createRootContext(opts.scheduler, opts.playerHandler);\n\n  const renderer = rendererFactory.createRenderer(hostRNode, componentDef);\n  const rootTView = createTView(TViewType.Root, null, null, 1, 0, null, null, null, null, null);\n  const rootView: LView = createLView(\n      null, rootTView, rootContext, rootFlags, null, null, rendererFactory, renderer, null,\n      opts.injector || null);\n\n  enterView(rootView);\n  let component: T;\n\n  try {\n    if (rendererFactory.begin) rendererFactory.begin();\n    const componentView = createRootComponentView(\n        hostRNode, componentDef, rootView, rendererFactory, renderer, sanitizer);\n    component = createRootComponent(\n        componentView, componentDef, rootView, rootContext, opts.hostFeatures || null);\n\n    // create mode pass\n    renderView(rootTView, rootView, null);\n    // update mode pass\n    refreshView(rootTView, rootView, null, null);\n\n  } finally {\n    leaveView();\n    if (rendererFactory.end) rendererFactory.end();\n  }\n\n  return component;\n}\n\n/**\n * Creates the root component view and the root component node.\n *\n * @param rNode Render host element.\n * @param def ComponentDef\n * @param rootView The parent view where the host node is stored\n * @param rendererFactory Factory to be used for creating child renderers.\n * @param hostRenderer The current renderer\n * @param sanitizer The sanitizer, if provided\n *\n * @returns Component view created\n */\nexport function createRootComponentView(\n    rNode: RElement|null, def: ComponentDef<any>, rootView: LView,\n    rendererFactory: RendererFactory3, hostRenderer: Renderer3, sanitizer?: Sanitizer|null): LView {\n  const tView = rootView[TVIEW];\n  const index = HEADER_OFFSET;\n  ngDevMode && assertIndexInRange(rootView, index);\n  rootView[index] = rNode;\n  // '#host' is added here as we don't know the real host DOM name (we don't want to read it) and at\n  // the same time we want to communicate the debug `TNode` that this is a special `TNode`\n  // representing a host element.\n  const tNode: TElementNode = getOrCreateTNode(tView, index, TNodeType.Element, '#host', null);\n  const mergedAttrs = tNode.mergedAttrs = def.hostAttrs;\n  if (mergedAttrs !== null) {\n    computeStaticStyling(tNode, mergedAttrs, true);\n    if (rNode !== null) {\n      setUpAttributes(hostRenderer, rNode, mergedAttrs);\n      if (tNode.classes !== null) {\n        writeDirectClass(hostRenderer, rNode, tNode.classes);\n      }\n      if (tNode.styles !== null) {\n        writeDirectStyle(hostRenderer, rNode, tNode.styles);\n      }\n    }\n  }\n\n  const viewRenderer = rendererFactory.createRenderer(rNode, def);\n  const componentView = createLView(\n      rootView, getOrCreateTComponentView(def), null,\n      def.onPush ? LViewFlags.Dirty : LViewFlags.CheckAlways, rootView[index], tNode,\n      rendererFactory, viewRenderer, sanitizer || null, null);\n\n  if (tView.firstCreatePass) {\n    diPublicInInjector(getOrCreateNodeInjectorForNode(tNode, rootView), tView, def.type);\n    markAsComponentHost(tView, tNode);\n    initTNodeFlags(tNode, rootView.length, 1);\n  }\n\n  addToViewTree(rootView, componentView);\n\n  // Store component view at node index, with node as the HOST\n  return rootView[index] = componentView;\n}\n\n/**\n * Creates a root component and sets it up with features and host bindings. Shared by\n * renderComponent() and ViewContainerRef.createComponent().\n */\nexport function createRootComponent<T>(\n    componentView: LView, componentDef: ComponentDef<T>, rootLView: LView, rootContext: RootContext,\n    hostFeatures: HostFeature[]|null): any {\n  const tView = rootLView[TVIEW];\n  // Create directive instance with factory() and store at next index in viewData\n  const component = instantiateRootComponent(tView, rootLView, componentDef);\n\n  rootContext.components.push(component);\n  componentView[CONTEXT] = component;\n\n  hostFeatures && hostFeatures.forEach((feature) => feature(component, componentDef));\n\n  // We want to generate an empty QueryList for root content queries for backwards\n  // compatibility with ViewEngine.\n  if (componentDef.contentQueries) {\n    const tNode = getCurrentTNode()!;\n    ngDevMode && assertDefined(tNode, 'TNode expected');\n    componentDef.contentQueries(RenderFlags.Create, component, tNode.directiveStart);\n  }\n\n  const rootTNode = getCurrentTNode()!;\n  ngDevMode && assertDefined(rootTNode, 'tNode should have been already created');\n  if (tView.firstCreatePass &&\n      (componentDef.hostBindings !== null || componentDef.hostAttrs !== null)) {\n    setSelectedIndex(rootTNode.index);\n\n    const rootTView = rootLView[TVIEW];\n    registerHostBindingOpCodes(\n        rootTView, rootTNode, rootLView, rootTNode.directiveStart, rootTNode.directiveEnd,\n        componentDef);\n\n    invokeHostBindingsInCreationMode(componentDef, component);\n  }\n  return component;\n}\n\n\nexport function createRootContext(\n    scheduler?: (workFn: () => void) => void, playerHandler?: PlayerHandler|null): RootContext {\n  return {\n    components: [],\n    scheduler: scheduler || defaultScheduler,\n    clean: CLEAN_PROMISE,\n    playerHandler: playerHandler || null,\n    flags: RootContextFlags.Empty\n  };\n}\n\n/**\n * Used to enable lifecycle hooks on the root component.\n *\n * Include this feature when calling `renderComponent` if the root component\n * you are rendering has lifecycle hooks defined. Otherwise, the hooks won't\n * be called properly.\n *\n * Example:\n *\n * ```\n * renderComponent(AppComponent, {hostFeatures: [LifecycleHooksFeature]});\n * ```\n */\nexport function LifecycleHooksFeature(component: any, def: ComponentDef<any>): void {\n  const lView = readPatchedLView(component)!;\n  ngDevMode && assertDefined(lView, 'LView is required');\n  const tView = lView[TVIEW];\n  const tNode = getCurrentTNode()!;\n  ngDevMode && assertDefined(tNode, 'TNode is required');\n  registerPostOrderHooks(tView, tNode);\n}\n\n/**\n * Wait on component until it is rendered.\n *\n * This function returns a `Promise` which is resolved when the component's\n * change detection is executed. This is determined by finding the scheduler\n * associated with the `component`'s render tree and waiting until the scheduler\n * flushes. If nothing is scheduled, the function returns a resolved promise.\n *\n * Example:\n * ```\n * await whenRendered(myComponent);\n * ```\n *\n * @param component Component to wait upon\n * @returns Promise which resolves when the component is rendered.\n */\nexport function whenRendered(component: any): Promise<null> {\n  return getRootContext(component).clean;\n}\n"]}