@angular/core
Version:
Angular - the core framework
195 lines • 33.9 kB
JavaScript
/**
* @license
* Copyright Google Inc. 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 { assertDataInRange } from '../util/assert';
import { assertComponentType } from './assert';
import { getComponentDef } from './definition';
import { diPublicInInjector, getOrCreateNodeInjectorForNode } from './di';
import { registerPostOrderHooks, registerPreOrderHooks } from './hooks';
import { CLEAN_PROMISE, addToViewTree, createLView, createTView, getOrCreateTNode, getOrCreateTView, initNodeFlags, instantiateRootComponent, invokeHostBindingsInCreationMode, locateHostElement, queueComponentIndexForCheck, refreshDescendantViews } from './instructions/shared';
import { domRendererFactory3 } from './interfaces/renderer';
import { CONTEXT, FLAGS, HEADER_OFFSET, HOST, RENDERER, TVIEW } from './interfaces/view';
import { applyOnCreateInstructions } from './node_util';
import { enterView, getPreviousOrParentTNode, leaveView, resetComponentState, setActiveHostElement } from './state';
import { renderInitialClasses, renderInitialStyles } from './styling/class_and_style_bindings';
import { publishDefaultGlobalUtils } from './util/global_utils';
import { defaultScheduler, stringifyForError } from './util/misc_utils';
import { getRootContext } from './util/view_traversal_utils';
import { readPatchedLView, resetPreOrderHookFlags } from './util/view_utils';
var ɵ0 = function (token, notFoundValue) {
throw new Error('NullInjector: Not found: ' + stringifyForError(token));
};
// TODO: A hack to not pull in the NullInjector from @angular/core.
export var NULL_INJECTOR = {
get: ɵ0
};
/**
* 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) {
if (opts === void 0) { opts = {}; }
ngDevMode && publishDefaultGlobalUtils();
ngDevMode && assertComponentType(componentType);
// this is preemptively set to avoid having test and debug code accidentally
// read data from a previous application state...
setActiveHostElement(null);
var rendererFactory = opts.rendererFactory || domRendererFactory3;
var sanitizer = opts.sanitizer || null;
var componentDef = getComponentDef(componentType);
if (componentDef.type != componentType)
componentDef.type = componentType;
// The first index of the first selector is the tag name.
var componentTag = componentDef.selectors[0][0];
var hostRNode = locateHostElement(rendererFactory, opts.host || componentTag);
var rootFlags = componentDef.onPush ? 64 /* Dirty */ | 512 /* IsRoot */ :
16 /* CheckAlways */ | 512 /* IsRoot */;
var rootContext = createRootContext(opts.scheduler, opts.playerHandler);
var renderer = rendererFactory.createRenderer(hostRNode, componentDef);
var rootView = createLView(null, createTView(-1, null, 1, 0, null, null, null, null), rootContext, rootFlags, null, null, rendererFactory, renderer, undefined, opts.injector || null);
var oldView = enterView(rootView, null);
var component;
// Will become true if the `try` block executes with no errors.
var safeToRunHooks = false;
try {
if (rendererFactory.begin)
rendererFactory.begin();
var componentView = createRootComponentView(hostRNode, componentDef, rootView, rendererFactory, renderer, sanitizer);
component = createRootComponent(componentView, componentDef, rootView, rootContext, opts.hostFeatures || null);
addToViewTree(rootView, componentView);
refreshDescendantViews(rootView); // creation mode pass
rootView[FLAGS] &= ~4 /* CreationMode */;
resetPreOrderHookFlags(rootView);
refreshDescendantViews(rootView); // update mode pass
safeToRunHooks = true;
}
finally {
leaveView(oldView, safeToRunHooks);
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 renderer The current renderer
* @param sanitizer The sanitizer, if provided
*
* @returns Component view created
*/
export function createRootComponentView(rNode, def, rootView, rendererFactory, renderer, sanitizer) {
resetComponentState();
var tView = rootView[TVIEW];
ngDevMode && assertDataInRange(rootView, 0 + HEADER_OFFSET);
rootView[0 + HEADER_OFFSET] = rNode;
var tNode = getOrCreateTNode(tView, null, 0, 3 /* Element */, null, null);
var componentView = createLView(rootView, getOrCreateTView(def), null, def.onPush ? 64 /* Dirty */ : 16 /* CheckAlways */, rootView[HEADER_OFFSET], tNode, rendererFactory, renderer, sanitizer);
if (tView.firstTemplatePass) {
diPublicInInjector(getOrCreateNodeInjectorForNode(tNode, rootView), rootView, def.type);
tNode.flags = 1 /* isComponent */;
initNodeFlags(tNode, rootView.length, 1);
queueComponentIndexForCheck(tNode);
}
// Store component view at node index, with node as the HOST
return rootView[HEADER_OFFSET] = 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, rootView, rootContext, hostFeatures) {
var tView = rootView[TVIEW];
// Create directive instance with factory() and store at next index in viewData
var component = instantiateRootComponent(tView, rootView, componentDef);
rootContext.components.push(component);
componentView[CONTEXT] = component;
hostFeatures && hostFeatures.forEach(function (feature) { return feature(component, componentDef); });
// We want to generate an empty QueryList for root content queries for backwards
// compatibility with ViewEngine.
if (componentDef.contentQueries) {
componentDef.contentQueries(1 /* Create */, component, rootView.length - 1);
}
var rootTNode = getPreviousOrParentTNode();
if (tView.firstTemplatePass && componentDef.hostBindings) {
var elementIndex = rootTNode.index - HEADER_OFFSET;
setActiveHostElement(elementIndex);
var expando = tView.expandoInstructions;
invokeHostBindingsInCreationMode(componentDef, expando, component, rootTNode, tView.firstTemplatePass);
rootTNode.onElementCreationFns && applyOnCreateInstructions(rootTNode);
setActiveHostElement(null);
}
if (rootTNode.stylingTemplate) {
var native = componentView[HOST];
renderInitialClasses(native, rootTNode.stylingTemplate, componentView[RENDERER]);
renderInitialStyles(native, rootTNode.stylingTemplate, componentView[RENDERER]);
}
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, {features: [RootLifecycleHooks]});
* ```
*/
export function LifecycleHooksFeature(component, def) {
var rootTView = readPatchedLView(component)[TVIEW];
var dirIndex = rootTView.data.length - 1;
registerPreOrderHooks(dirIndex, def, rootTView, -1, -1, -1);
// TODO(misko): replace `as TNode` with createTNode call. (needs refactoring to lose dep on
// LNode).
registerPostOrderHooks(rootTView, { directiveStart: dirIndex, directiveEnd: dirIndex + 1 });
}
/**
* 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;
}
export { ɵ0 };
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* @license\n * Copyright Google Inc. 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 {Type} from '../core';\nimport {Injector} from '../di/injector';\nimport {Sanitizer} from '../sanitization/security';\nimport {assertDataInRange, assertEqual} from '../util/assert';\n\nimport {assertComponentType} from './assert';\nimport {getComponentDef} from './definition';\nimport {diPublicInInjector, getOrCreateNodeInjectorForNode} from './di';\nimport {registerPostOrderHooks, registerPreOrderHooks} from './hooks';\nimport {CLEAN_PROMISE, addToViewTree, createLView, createTView, getOrCreateTNode, getOrCreateTView, initNodeFlags, instantiateRootComponent, invokeHostBindingsInCreationMode, locateHostElement, queueComponentIndexForCheck, refreshDescendantViews} from './instructions/shared';\nimport {ComponentDef, ComponentType, RenderFlags} from './interfaces/definition';\nimport {TElementNode, TNode, TNodeFlags, TNodeType} from './interfaces/node';\nimport {PlayerHandler} from './interfaces/player';\nimport {RElement, Renderer3, RendererFactory3, domRendererFactory3} from './interfaces/renderer';\nimport {CONTEXT, FLAGS, HEADER_OFFSET, HOST, LView, LViewFlags, RENDERER, RootContext, RootContextFlags, TVIEW} from './interfaces/view';\nimport {applyOnCreateInstructions} from './node_util';\nimport {enterView, getPreviousOrParentTNode, leaveView, resetComponentState, setActiveHostElement} from './state';\nimport {renderInitialClasses, renderInitialStyles} from './styling/class_and_style_bindings';\nimport {publishDefaultGlobalUtils} from './util/global_utils';\nimport {defaultScheduler, stringifyForError} from './util/misc_utils';\nimport {getRootContext} from './util/view_traversal_utils';\nimport {readPatchedLView, resetPreOrderHookFlags} from './util/view_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    throw new Error('NullInjector: Not found: ' + stringifyForError(token));\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  // this is preemptively set to avoid having test and debug code accidentally\n  // read data from a previous application state...\n  setActiveHostElement(null);\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.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 hostRNode = locateHostElement(rendererFactory, opts.host || componentTag);\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 rootView: LView = createLView(\n      null, createTView(-1, null, 1, 0, null, null, null, null), rootContext, rootFlags, null, null,\n      rendererFactory, renderer, undefined, opts.injector || null);\n\n  const oldView = enterView(rootView, null);\n  let component: T;\n\n  // Will become true if the `try` block executes with no errors.\n  let safeToRunHooks = false;\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    addToViewTree(rootView, componentView);\n\n    refreshDescendantViews(rootView);  // creation mode pass\n    rootView[FLAGS] &= ~LViewFlags.CreationMode;\n    resetPreOrderHookFlags(rootView);\n    refreshDescendantViews(rootView);  // update mode pass\n    safeToRunHooks = true;\n  } finally {\n    leaveView(oldView, safeToRunHooks);\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 renderer 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, renderer: Renderer3, sanitizer?: Sanitizer | null): LView {\n  resetComponentState();\n  const tView = rootView[TVIEW];\n  ngDevMode && assertDataInRange(rootView, 0 + HEADER_OFFSET);\n  rootView[0 + HEADER_OFFSET] = rNode;\n  const tNode: TElementNode = getOrCreateTNode(tView, null, 0, TNodeType.Element, null, null);\n  const componentView = createLView(\n      rootView, getOrCreateTView(def), null, def.onPush ? LViewFlags.Dirty : LViewFlags.CheckAlways,\n      rootView[HEADER_OFFSET], tNode, rendererFactory, renderer, sanitizer);\n\n  if (tView.firstTemplatePass) {\n    diPublicInInjector(getOrCreateNodeInjectorForNode(tNode, rootView), rootView, def.type);\n    tNode.flags = TNodeFlags.isComponent;\n    initNodeFlags(tNode, rootView.length, 1);\n    queueComponentIndexForCheck(tNode);\n  }\n\n  // Store component view at node index, with node as the HOST\n  return rootView[HEADER_OFFSET] = 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>, rootView: LView, rootContext: RootContext,\n    hostFeatures: HostFeature[] | null): any {\n  const tView = rootView[TVIEW];\n  // Create directive instance with factory() and store at next index in viewData\n  const component = instantiateRootComponent(tView, rootView, 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    componentDef.contentQueries(RenderFlags.Create, component, rootView.length - 1);\n  }\n\n  const rootTNode = getPreviousOrParentTNode();\n  if (tView.firstTemplatePass && componentDef.hostBindings) {\n    const elementIndex = rootTNode.index - HEADER_OFFSET;\n    setActiveHostElement(elementIndex);\n\n    const expando = tView.expandoInstructions !;\n    invokeHostBindingsInCreationMode(\n        componentDef, expando, component, rootTNode, tView.firstTemplatePass);\n    rootTNode.onElementCreationFns && applyOnCreateInstructions(rootTNode);\n\n    setActiveHostElement(null);\n  }\n\n  if (rootTNode.stylingTemplate) {\n    const native = componentView[HOST] !as RElement;\n    renderInitialClasses(native, rootTNode.stylingTemplate, componentView[RENDERER]);\n    renderInitialStyles(native, rootTNode.stylingTemplate, componentView[RENDERER]);\n  }\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, {features: [RootLifecycleHooks]});\n * ```\n */\nexport function LifecycleHooksFeature(component: any, def: ComponentDef<any>): void {\n  const rootTView = readPatchedLView(component) ![TVIEW];\n  const dirIndex = rootTView.data.length - 1;\n\n  registerPreOrderHooks(dirIndex, def, rootTView, -1, -1, -1);\n  // TODO(misko): replace `as TNode` with createTNode call. (needs refactoring to lose dep on\n  // LNode).\n  registerPostOrderHooks(\n      rootTView, { directiveStart: dirIndex, directiveEnd: dirIndex + 1 } as 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"]}