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fix(core): Document the new bootstrap APIs. Also rename rootBindings() to platformBindings() to be more clear about what it is. 

Closes #4218
This commit is contained in:
Alex Rickabaugh 2015-09-15 15:51:15 -07:00
parent f490565b09
commit 06f8330cfa
3 changed files with 141 additions and 28 deletions
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36
modules/angular2/src/core/application_common.ts
View File

@ -92,14 +92,38 @@ export function applicationDomBindings(): Array<Type | Binding | any[]> {
];
}
/**
* Initialize the Angular context on the page.
* Initialize the Angular 'platform' on the page.
*
* If no bindings are provided, calling {@link platform}() is idempotent,
* and will use the default platform bindings (which can be obtained from
* {@link ApplicationRef/rootBindings}).
* See {@link PlatformRef} for details on the Angular platform.
*
* # Without specified bindings
*
* If no bindings are specified, `platform`'s behavior depends on whether an existing
* platform exists:
*
* If no platform exists, a new one will be created with the default {@link platformBindings}.
*
* If a platform already exists, it will be returned (regardless of what bindings it
* was created with). This is a convenience feature, allowing for multiple applications
* to be loaded into the same platform without awareness of each other.
*
* # With specified bindings
*
* It is also possible to specify bindings to be made in the new platform. These bindings
* will be shared between all applications on the page. For example, an abstraction for
* the browser cookie jar should be bound at the platform level, because there is only one
* cookie jar regardless of how many applications on the age will be accessing it.
*
* If bindings are specified directly, `platform` will create the Angular platform with
* them if a platform did not exist already. If it did exist, however, an error will be
* thrown.
*
* # DOM Applications
*
* This version of `platform` initializes Angular to run in the UI thread, with direct
* DOM access. Web-worker applications should call `platform` from
* `src/web_workers/worker/application_common` instead.
*/
export function platform(bindings?: Array<Type | Binding | any[]>): PlatformRef {
return platformCommon(bindings, () => {

97
modules/angular2/src/core/application_ref.ts
View File

@ -1,4 +1,3 @@
import {NgZone} from 'angular2/src/core/zone/ng_zone';
import {Type, isBlank, isPresent, assertionsEnabled} from 'angular2/src/core/facade/lang';
import {bind, Binding, Injector, OpaqueToken} from 'angular2/src/core/di';
@ -47,9 +46,12 @@ import {ComponentUrlMapper} from 'angular2/src/core/compiler/component_url_mappe
/**
* Contains everything that is safe to share between applications.
* Constructs the set of bindings meant for use at the platform level.
*
* These are bindings that should be singletons shared among all Angular applications
* running on the page.
*/
export function rootBindings(): Array<Type | Binding | any[]> {
export function platformBindings(): Array<Type | Binding | any[]> {
return [bind(Reflector).toValue(reflector), TestabilityRegistry];
}
@ -145,18 +147,19 @@ export function platformCommon(bindings?: Array<Type | Binding | any[]>, initial
}
if (isBlank(bindings)) {
bindings = rootBindings();
bindings = platformBindings();
}
_platform = new PlatformRef(Injector.resolveAndCreate(bindings), () => { _platform = null; });
return _platform;
}
/**
* Represent the Angular context on a page, and is a true singleton.
* The Angular platform is the entry point for Angular on a web page. Each page
* has exactly one platform, and services (such as reflection) which are common
* to every Angular application running on the page are bound in its scope.
*
* The platform {@link Injector} injects dependencies which are also
* truly singletons in the context of a page (such as the browser's
* cookie jar).
* A page's platform is initialized implicitly when {@link bootstrap}() is called, or
* explicitly by calling {@link platform}().
*/
export class PlatformRef {
/**
@ -170,14 +173,38 @@ export class PlatformRef {
constructor(private _injector: Injector, private _dispose: () => void) {}
/**
* Get the platform {@link Injector}.
* Retrieve the platform {@link Injector}, which is the parent injector for
* every Angular application on the page and provides singleton bindings.
*/
get injector(): Injector { return this._injector; }
/**
* Build a new Angular application with the given bindings. The `ApplicationRef`
* returned can be used to bootstrap one or more root components within the
* application.
* Instantiate a new Angular application on the page.
*
* # What is an application?
*
* Each Angular application has its own zone, change detection, compiler,
* renderer, and other framework components. An application hosts one or more
* root components, which can be initialized via `ApplicationRef.bootstrap()`.
*
* # Application Bindings
*
* Angular applications require numerous bindings to be properly instantiated.
* When using `application()` to create a new app on the page, these bindings
* must be provided. Fortunately, there are helper functions to configure
* typical bindings, as shown in the example below.
*
* # Example
* ```
* var myAppBindings = [MyAppService];
*
* platform()
* .application([applicationCommonBindings(), applicationDomBindings(), myAppBindings])
* .bootstrap(MyTopLevelComponent);
* ```
* # See Also
*
* See the {@link bootstrap} documentation for more details.
*/
application(bindings: Array<Type | Binding | any[]>): ApplicationRef {
var app = this._initApp(createNgZone(), bindings);
@ -185,10 +212,16 @@ export class PlatformRef {
}
/**
* Build a new Angular application from asynchronously provided bindings.
* Instantiate a new Angular application on the page, using bindings which
* are only available asynchronously. One such use case is to initialize an
* application running in a web worker.
*
* Runs the `AsyncLoader` callback in the application `Zone` and constructs
* a new Application from the bindings provided by the `Promise` it returns.
* # Usage
*
* `bindingFn` is a function that will be called in the new application's zone.
* It should return a {@link Promise} to a list of bindings to be used for the
* new application. Once this promise resolves, the application will be
* constructed in the same manner as a normal `application()`.
*/
asyncApplication(bindingFn: (zone: NgZone) =>
Promise<Array<Type | Binding | any[]>>): Promise<ApplicationRef> {
@ -242,11 +275,9 @@ export class PlatformRef {
}
/**
* Represents an Angular application.
* A reference to an Angular application running on a page.
*
* Use to retrieve the application {@link Injector} or to bootstrap new
* components at the root of the application. Can also be used to dispose
* of the entire application and all its loaded components.
* For more about Angular applications, see the documentation for {@link bootstrap}.
*/
export class ApplicationRef {
private _bootstrapListeners: Function[] = [];
@ -258,15 +289,34 @@ export class ApplicationRef {
constructor(private _platform: PlatformRef, private _zone: NgZone, private _injector: Injector) {}
/**
* Register a listener to be called each time a new root component type is bootstrapped.
* Register a listener to be called each time `bootstrap()` is called to bootstrap
* a new root component.
*/
registerBootstrapListener(listener: (ref: ComponentRef) => void): void {
this._bootstrapListeners.push(listener);
}
/**
* Bootstrap a new component at the root level of the application, optionally with
* component specific bindings.
* Bootstrap a new component at the root level of the application.
*
* # Bootstrap process
*
* When bootstrapping a new root component into an application, Angular mounts the
* specified application component onto DOM elements identified by the [componentType]'s
* selector and kicks off automatic change detection to finish initializing the component.
*
* # Optional Bindings
*
* Bindings for the given component can optionally be overridden via the `bindings`
* parameter. These bindings will only apply for the root component being added and any
* child components under it.
*
* # Example
* ```
* var app = platform.application([applicationCommonBindings(), applicationDomBindings()];
* app.bootstrap(FirstRootComponent);
* app.bootstrap(SecondRootComponent, [bind(OverrideBinding).toClass(OverriddenBinding)]);
* ```
*/
bootstrap(componentType: Type, bindings?: Array<Type | Binding | any[]>): Promise<ComponentRef> {
var completer = PromiseWrapper.completer();
@ -312,6 +362,9 @@ export class ApplicationRef {
*/
get zone(): NgZone { return this._zone; }
/**
* Dispose of this application and all of its components.
*/
dispose(): void {
// TODO(alxhub): Dispose of the NgZone.
this._rootComponents.forEach((ref) => ref.dispose());

36
modules/angular2/src/web_workers/worker/application_common.ts
View File

@ -36,6 +36,42 @@ import {WebWorkerEventDispatcher} from 'angular2/src/web_workers/worker/event_di
import {ComponentRef} from 'angular2/src/core/compiler/dynamic_component_loader';
import {NgZone} from 'angular2/src/core/zone/ng_zone';
/**
* Initialize the Angular 'platform' on the page in a manner suitable for applications
* running in a web worker. Applications running on a web worker do not have direct
* access to DOM APIs.
*
* See {@link PlatformRef} for details on the Angular platform.
*
* # Without specified bindings
*
* If no bindings are specified, `platform`'s behavior depends on whether an existing
* platform exists:
*
* If no platform exists, a new one will be created with the default {@link platformBindings}.
*
* If a platform already exists, it will be returned (regardless of what bindings it
* was created with). This is a convenience feature, allowing for multiple applications
* to be loaded into the same platform without awareness of each other.
*
* # With specified bindings
*
* It is also possible to specify bindings to be made in the new platform. These bindings
* will be shared between all applications on the page. For example, an abstraction for
* the browser cookie jar should be bound at the platform level, because there is only one
* cookie jar regardless of how many applications on the age will be accessing it.
*
* If bindings are specified directly, `platform` will create the Angular platform with
* them if a platform did not exist already. If it did exist, however, an error will be
* thrown.
*
* # For Web Worker Appplications
*
* This version of `platform` initializes Angular for use with applications
* that do not directly touch the DOM, such as applications which run in a
* web worker context. Applications that need direct access to the DOM should
* use `platform` from `core/application_common` instead.
*/
export function platform(bindings?: Array<Type | Binding | any[]>): PlatformRef {
return platformCommon(bindings);
}