9092ac79d4
This changes Angular so that it can be used without reflection (assuming a codegen for injectors).
BREAKIKNG CHANGE:
- Drops `APP_COMPONENT` provider. Instead, inject
`ApplicationRef` and read its `componentTypes` property.
- long form bootstrap has changed into the following:
```
var platform = createPlatform(ReflectiveInjector.resolveAndCreate(BROWSER_PROVIDERS));
var appInjector =
ReflectiveInjector.resolveAndCreate([BROWSER_APP_PROVIDERS, appProviders], platform.injector);
coreLoadAndBootstrap(appInjector, MyApp);
```
613 lines
22 KiB
TypeScript
613 lines
22 KiB
TypeScript
import {
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provide,
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ApplicationRef,
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ComponentResolver,
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Injector,
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NgZone,
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PlatformRef,
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ReflectiveInjector,
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ComponentFactory,
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Provider,
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Type,
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Testability,
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APPLICATION_COMMON_PROVIDERS
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} from 'angular2/core';
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import {global} from 'angular2/src/facade/lang';
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import {ObservableWrapper} from 'angular2/src/facade/async';
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import {BROWSER_PROVIDERS, BROWSER_APP_PROVIDERS, browserPlatform} from 'angular2/platform/browser';
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import {getComponentInfo, ComponentInfo} from './metadata';
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import {onError, controllerKey} from './util';
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import {
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NG1_COMPILE,
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NG1_INJECTOR,
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NG1_PARSE,
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NG1_ROOT_SCOPE,
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NG1_SCOPE,
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NG1_TESTABILITY,
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NG2_COMPILER,
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NG2_INJECTOR,
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NG2_COMPONENT_FACTORY_REF_MAP,
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NG2_ZONE,
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REQUIRE_INJECTOR
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} from './constants';
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import {DowngradeNg2ComponentAdapter} from './downgrade_ng2_adapter';
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import {UpgradeNg1ComponentAdapterBuilder} from './upgrade_ng1_adapter';
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import * as angular from './angular_js';
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var upgradeCount: number = 0;
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/**
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* Use `UpgradeAdapter` to allow AngularJS v1 and Angular v2 to coexist in a single application.
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*
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* The `UpgradeAdapter` allows:
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* 1. creation of Angular v2 component from AngularJS v1 component directive
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* (See [UpgradeAdapter#upgradeNg1Component()])
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* 2. creation of AngularJS v1 directive from Angular v2 component.
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* (See [UpgradeAdapter#downgradeNg2Component()])
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* 3. Bootstrapping of a hybrid Angular application which contains both of the frameworks
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* coexisting in a single application.
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*
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* ## Mental Model
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*
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* When reasoning about how a hybrid application works it is useful to have a mental model which
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* describes what is happening and explains what is happening at the lowest level.
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*
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* 1. There are two independent frameworks running in a single application, each framework treats
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* the other as a black box.
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* 2. Each DOM element on the page is owned exactly by one framework. Whichever framework
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* instantiated the element is the owner. Each framework only updates/interacts with its own
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* DOM elements and ignores others.
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* 3. AngularJS v1 directives always execute inside AngularJS v1 framework codebase regardless of
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* where they are instantiated.
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* 4. Angular v2 components always execute inside Angular v2 framework codebase regardless of
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* where they are instantiated.
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* 5. An AngularJS v1 component can be upgraded to an Angular v2 component. This creates an
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* Angular v2 directive, which bootstraps the AngularJS v1 component directive in that location.
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* 6. An Angular v2 component can be downgraded to an AngularJS v1 component directive. This creates
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* an AngularJS v1 directive, which bootstraps the Angular v2 component in that location.
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* 7. Whenever an adapter component is instantiated the host element is owned by the framework
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* doing the instantiation. The other framework then instantiates and owns the view for that
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* component. This implies that component bindings will always follow the semantics of the
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* instantiation framework. The syntax is always that of Angular v2 syntax.
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* 8. AngularJS v1 is always bootstrapped first and owns the bottom most view.
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* 9. The new application is running in Angular v2 zone, and therefore it no longer needs calls to
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* `$apply()`.
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*
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* ### Example
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*
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* ```
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* var adapter = new UpgradeAdapter();
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* var module = angular.module('myExample', []);
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* module.directive('ng2', adapter.downgradeNg2Component(Ng2));
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*
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* module.directive('ng1', function() {
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* return {
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* scope: { title: '=' },
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* template: 'ng1[Hello {{title}}!](<span ng-transclude></span>)'
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* };
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* });
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*
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*
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* @Component({
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* selector: 'ng2',
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* inputs: ['name'],
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* template: 'ng2[<ng1 [title]="name">transclude</ng1>](<ng-content></ng-content>)',
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* directives: [adapter.upgradeNg1Component('ng1')]
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* })
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* class Ng2 {
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* }
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*
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* document.body.innerHTML = '<ng2 name="World">project</ng2>';
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*
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* adapter.bootstrap(document.body, ['myExample']).ready(function() {
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* expect(document.body.textContent).toEqual(
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* "ng2[ng1[Hello World!](transclude)](project)");
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* });
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* ```
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*/
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export class UpgradeAdapter {
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/* @internal */
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private idPrefix: string = `NG2_UPGRADE_${upgradeCount++}_`;
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/* @internal */
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private upgradedComponents: Type[] = [];
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/* @internal */
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private downgradedComponents: {[name: string]: UpgradeNg1ComponentAdapterBuilder} = {};
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/* @internal */
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private providers: Array<Type | Provider | any[]> = [];
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/**
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* Allows Angular v2 Component to be used from AngularJS v1.
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*
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* Use `downgradeNg2Component` to create an AngularJS v1 Directive Definition Factory from
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* Angular v2 Component. The adapter will bootstrap Angular v2 component from within the
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* AngularJS v1 template.
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*
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* ## Mental Model
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*
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* 1. The component is instantiated by being listed in AngularJS v1 template. This means that the
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* host element is controlled by AngularJS v1, but the component's view will be controlled by
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* Angular v2.
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* 2. Even thought the component is instantiated in AngularJS v1, it will be using Angular v2
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* syntax. This has to be done, this way because we must follow Angular v2 components do not
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* declare how the attributes should be interpreted.
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*
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* ## Supported Features
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*
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* - Bindings:
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* - Attribute: `<comp name="World">`
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* - Interpolation: `<comp greeting="Hello {{name}}!">`
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* - Expression: `<comp [name]="username">`
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* - Event: `<comp (close)="doSomething()">`
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* - Content projection: yes
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*
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* ### Example
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*
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* ```
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* var adapter = new UpgradeAdapter();
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* var module = angular.module('myExample', []);
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* module.directive('greet', adapter.downgradeNg2Component(Greeter));
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*
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* @Component({
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* selector: 'greet',
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* template: '{{salutation}} {{name}}! - <ng-content></ng-content>'
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* })
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* class Greeter {
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* @Input() salutation: string;
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* @Input() name: string;
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* }
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*
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* document.body.innerHTML =
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* 'ng1 template: <greet salutation="Hello" [name]="world">text</greet>';
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*
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* adapter.bootstrap(document.body, ['myExample']).ready(function() {
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* expect(document.body.textContent).toEqual("ng1 template: Hello world! - text");
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* });
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* ```
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*/
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downgradeNg2Component(type: Type): Function {
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this.upgradedComponents.push(type);
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var info: ComponentInfo = getComponentInfo(type);
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return ng1ComponentDirective(info, `${this.idPrefix}${info.selector}_c`);
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}
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/**
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* Allows AngularJS v1 Component to be used from Angular v2.
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*
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* Use `upgradeNg1Component` to create an Angular v2 component from AngularJS v1 Component
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* directive. The adapter will bootstrap AngularJS v1 component from within the Angular v2
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* template.
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*
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* ## Mental Model
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*
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* 1. The component is instantiated by being listed in Angular v2 template. This means that the
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* host element is controlled by Angular v2, but the component's view will be controlled by
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* AngularJS v1.
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*
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* ## Supported Features
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*
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* - Bindings:
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* - Attribute: `<comp name="World">`
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* - Interpolation: `<comp greeting="Hello {{name}}!">`
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* - Expression: `<comp [name]="username">`
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* - Event: `<comp (close)="doSomething()">`
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* - Transclusion: yes
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* - Only some of the features of
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* [Directive Definition Object](https://docs.angularjs.org/api/ng/service/$compile) are
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* supported:
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* - `compile`: not supported because the host element is owned by Angular v2, which does
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* not allow modifying DOM structure during compilation.
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* - `controller`: supported. (NOTE: injection of `$attrs` and `$transclude` is not supported.)
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* - `controllerAs': supported.
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* - `bindToController': supported.
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* - `link': supported. (NOTE: only pre-link function is supported.)
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* - `name': supported.
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* - `priority': ignored.
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* - `replace': not supported.
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* - `require`: supported.
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* - `restrict`: must be set to 'E'.
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* - `scope`: supported.
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* - `template`: supported.
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* - `templateUrl`: supported.
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* - `terminal`: ignored.
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* - `transclude`: supported.
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*
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*
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* ### Example
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*
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* ```
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* var adapter = new UpgradeAdapter();
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* var module = angular.module('myExample', []);
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*
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* module.directive('greet', function() {
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* return {
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* scope: {salutation: '=', name: '=' },
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* template: '{{salutation}} {{name}}! - <span ng-transclude></span>'
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* };
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* });
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*
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* module.directive('ng2', adapter.downgradeNg2Component(Ng2));
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*
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* @Component({
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* selector: 'ng2',
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* template: 'ng2 template: <greet salutation="Hello" [name]="world">text</greet>'
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* directives: [adapter.upgradeNg1Component('greet')]
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* })
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* class Ng2 {
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* }
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*
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* document.body.innerHTML = '<ng2></ng2>';
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*
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* adapter.bootstrap(document.body, ['myExample']).ready(function() {
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* expect(document.body.textContent).toEqual("ng2 template: Hello world! - text");
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* });
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* ```
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*/
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upgradeNg1Component(name: string): Type {
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if ((<any>this.downgradedComponents).hasOwnProperty(name)) {
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return this.downgradedComponents[name].type;
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} else {
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return (this.downgradedComponents[name] = new UpgradeNg1ComponentAdapterBuilder(name)).type;
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}
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}
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/**
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* Bootstrap a hybrid AngularJS v1 / Angular v2 application.
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*
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* This `bootstrap` method is a direct replacement (takes same arguments) for AngularJS v1
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* [`bootstrap`](https://docs.angularjs.org/api/ng/function/angular.bootstrap) method. Unlike
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* AngularJS v1, this bootstrap is asynchronous.
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*
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* ### Example
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*
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* ```
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* var adapter = new UpgradeAdapter();
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* var module = angular.module('myExample', []);
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* module.directive('ng2', adapter.downgradeNg2Component(Ng2));
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*
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* module.directive('ng1', function() {
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* return {
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* scope: { title: '=' },
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* template: 'ng1[Hello {{title}}!](<span ng-transclude></span>)'
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* };
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* });
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*
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*
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* @Component({
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* selector: 'ng2',
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* inputs: ['name'],
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* template: 'ng2[<ng1 [title]="name">transclude</ng1>](<ng-content></ng-content>)',
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* directives: [adapter.upgradeNg1Component('ng1')]
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* })
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* class Ng2 {
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* }
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*
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* document.body.innerHTML = '<ng2 name="World">project</ng2>';
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*
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* adapter.bootstrap(document.body, ['myExample']).ready(function() {
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* expect(document.body.textContent).toEqual(
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* "ng2[ng1[Hello World!](transclude)](project)");
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* });
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* ```
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*/
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bootstrap(element: Element, modules?: any[],
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config?: angular.IAngularBootstrapConfig): UpgradeAdapterRef {
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var upgrade = new UpgradeAdapterRef();
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var ng1Injector: angular.IInjectorService = null;
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var platformRef: PlatformRef = browserPlatform();
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var applicationRef: ApplicationRef =
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ReflectiveInjector.resolveAndCreate(
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[
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BROWSER_APP_PROVIDERS,
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provide(NG1_INJECTOR, {useFactory: () => ng1Injector}),
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provide(NG1_COMPILE,
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{useFactory: () => ng1Injector.get(NG1_COMPILE)}),
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this.providers
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],
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platformRef.injector)
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.get(ApplicationRef);
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var injector: Injector = applicationRef.injector;
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var ngZone: NgZone = injector.get(NgZone);
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var compiler: ComponentResolver = injector.get(ComponentResolver);
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var delayApplyExps: Function[] = [];
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var original$applyFn: Function;
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var rootScopePrototype: any;
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var rootScope: angular.IRootScopeService;
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var componentFactoryRefMap: ComponentFactoryRefMap = {};
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var ng1Module = angular.module(this.idPrefix, modules);
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var ng1BootstrapPromise: Promise<any> = null;
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var ng1compilePromise: Promise<any> = null;
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ng1Module.value(NG2_INJECTOR, injector)
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.value(NG2_ZONE, ngZone)
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.value(NG2_COMPILER, compiler)
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.value(NG2_COMPONENT_FACTORY_REF_MAP, componentFactoryRefMap)
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.config([
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'$provide',
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(provide) => {
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provide.decorator(NG1_ROOT_SCOPE, [
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'$delegate',
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function(rootScopeDelegate: angular.IRootScopeService) {
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rootScopePrototype = rootScopeDelegate.constructor.prototype;
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if (rootScopePrototype.hasOwnProperty('$apply')) {
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original$applyFn = rootScopePrototype.$apply;
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rootScopePrototype.$apply = (exp) => delayApplyExps.push(exp);
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} else {
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throw new Error("Failed to find '$apply' on '$rootScope'!");
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}
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return rootScope = rootScopeDelegate;
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}
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]);
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provide.decorator(NG1_TESTABILITY, [
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'$delegate',
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function(testabilityDelegate: angular.ITestabilityService) {
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var ng2Testability: Testability = injector.get(Testability);
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var origonalWhenStable: Function = testabilityDelegate.whenStable;
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var newWhenStable = (callback: Function): void => {
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var whenStableContext: any = this;
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origonalWhenStable.call(this, function() {
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if (ng2Testability.isStable()) {
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callback.apply(this, arguments);
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} else {
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ng2Testability.whenStable(newWhenStable.bind(whenStableContext, callback));
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}
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});
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};
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testabilityDelegate.whenStable = newWhenStable;
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return testabilityDelegate;
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}
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]);
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}
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]);
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ng1compilePromise = new Promise((resolve, reject) => {
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ng1Module.run([
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'$injector',
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'$rootScope',
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(injector: angular.IInjectorService, rootScope: angular.IRootScopeService) => {
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ng1Injector = injector;
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ObservableWrapper.subscribe(ngZone.onMicrotaskEmpty,
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(_) => ngZone.runOutsideAngular(() => rootScope.$apply()));
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UpgradeNg1ComponentAdapterBuilder.resolve(this.downgradedComponents, injector)
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.then(resolve, reject);
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}
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]);
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});
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// Make sure resumeBootstrap() only exists if the current bootstrap is deferred
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var windowAngular = (<any>global).angular;
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windowAngular.resumeBootstrap = undefined;
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angular.element(element).data(controllerKey(NG2_INJECTOR), injector);
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ngZone.run(() => { angular.bootstrap(element, [this.idPrefix], config); });
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ng1BootstrapPromise = new Promise((resolve, reject) => {
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if (windowAngular.resumeBootstrap) {
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var originalResumeBootstrap: () => void = windowAngular.resumeBootstrap;
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windowAngular.resumeBootstrap = function() {
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windowAngular.resumeBootstrap = originalResumeBootstrap;
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windowAngular.resumeBootstrap.apply(this, arguments);
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resolve();
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};
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} else {
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resolve();
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}
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});
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Promise.all([
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this.compileNg2Components(compiler, componentFactoryRefMap),
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ng1BootstrapPromise,
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ng1compilePromise
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])
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.then(() => {
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ngZone.run(() => {
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if (rootScopePrototype) {
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rootScopePrototype.$apply = original$applyFn; // restore original $apply
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while (delayApplyExps.length) {
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rootScope.$apply(delayApplyExps.shift());
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}
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(<any>upgrade)._bootstrapDone(applicationRef, ng1Injector);
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rootScopePrototype = null;
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}
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});
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}, onError);
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return upgrade;
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}
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/**
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* Adds a provider to the top level environment of a hybrid AngularJS v1 / Angular v2 application.
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*
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* In hybrid AngularJS v1 / Angular v2 application, there is no one root Angular v2 component,
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* for this reason we provide an application global way of registering providers which is
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* consistent with single global injection in AngularJS v1.
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*
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* ### Example
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*
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* ```
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* class Greeter {
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* greet(name) {
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* alert('Hello ' + name + '!');
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* }
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* }
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*
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* @Component({
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* selector: 'app',
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* template: ''
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* })
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* class App {
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* constructor(greeter: Greeter) {
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* this.greeter('World');
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* }
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* }
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*
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* var adapter = new UpgradeAdapter();
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* adapter.addProvider(Greeter);
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*
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* var module = angular.module('myExample', []);
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* module.directive('app', adapter.downgradeNg2Component(App));
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*
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* document.body.innerHTML = '<app></app>'
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* adapter.bootstrap(document.body, ['myExample']);
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*```
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*/
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public addProvider(provider: Type | Provider | any[]): void { this.providers.push(provider); }
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|
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/**
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* Allows AngularJS v1 service to be accessible from Angular v2.
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*
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*
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* ### Example
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*
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* ```
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* class Login { ... }
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* class Server { ... }
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*
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* @Injectable()
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* class Example {
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* constructor(@Inject('server') server, login: Login) {
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* ...
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* }
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* }
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*
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* var module = angular.module('myExample', []);
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* module.service('server', Server);
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* module.service('login', Login);
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*
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* var adapter = new UpgradeAdapter();
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* adapter.upgradeNg1Provider('server');
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* adapter.upgradeNg1Provider('login', {asToken: Login});
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* adapter.addProvider(Example);
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*
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* adapter.bootstrap(document.body, ['myExample']).ready((ref) => {
|
|
* var example: Example = ref.ng2Injector.get(Example);
|
|
* });
|
|
*
|
|
* ```
|
|
*/
|
|
public upgradeNg1Provider(name: string, options?: {asToken: any}) {
|
|
var token = options && options.asToken || name;
|
|
this.providers.push(provide(token, {
|
|
useFactory: (ng1Injector: angular.IInjectorService) => ng1Injector.get(name),
|
|
deps: [NG1_INJECTOR]
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* Allows Angular v2 service to be accessible from AngularJS v1.
|
|
*
|
|
*
|
|
* ### Example
|
|
*
|
|
* ```
|
|
* class Example {
|
|
* }
|
|
*
|
|
* var adapter = new UpgradeAdapter();
|
|
* adapter.addProvider(Example);
|
|
*
|
|
* var module = angular.module('myExample', []);
|
|
* module.factory('example', adapter.downgradeNg2Provider(Example));
|
|
*
|
|
* adapter.bootstrap(document.body, ['myExample']).ready((ref) => {
|
|
* var example: Example = ref.ng1Injector.get('example');
|
|
* });
|
|
*
|
|
* ```
|
|
*/
|
|
public downgradeNg2Provider(token: any): Function {
|
|
var factory = function(injector: Injector) { return injector.get(token); };
|
|
(<any>factory).$inject = [NG2_INJECTOR];
|
|
return factory;
|
|
}
|
|
|
|
/* @internal */
|
|
private compileNg2Components(compiler: ComponentResolver,
|
|
componentFactoryRefMap: ComponentFactoryRefMap):
|
|
Promise<ComponentFactoryRefMap> {
|
|
var promises: Array<Promise<ComponentFactory>> = [];
|
|
var types = this.upgradedComponents;
|
|
for (var i = 0; i < types.length; i++) {
|
|
promises.push(compiler.resolveComponent(types[i]));
|
|
}
|
|
return Promise.all(promises).then((componentFactories: Array<ComponentFactory>) => {
|
|
var types = this.upgradedComponents;
|
|
for (var i = 0; i < componentFactories.length; i++) {
|
|
componentFactoryRefMap[getComponentInfo(types[i]).selector] = componentFactories[i];
|
|
}
|
|
return componentFactoryRefMap;
|
|
}, onError);
|
|
}
|
|
}
|
|
|
|
interface ComponentFactoryRefMap {
|
|
[selector: string]: ComponentFactory;
|
|
}
|
|
|
|
function ng1ComponentDirective(info: ComponentInfo, idPrefix: string): Function {
|
|
(<any>directiveFactory).$inject = [NG2_COMPONENT_FACTORY_REF_MAP, NG1_PARSE];
|
|
function directiveFactory(componentFactoryRefMap: ComponentFactoryRefMap,
|
|
parse: angular.IParseService): angular.IDirective {
|
|
var componentFactory: ComponentFactory = componentFactoryRefMap[info.selector];
|
|
if (!componentFactory) throw new Error('Expecting ComponentFactory for: ' + info.selector);
|
|
var idCount = 0;
|
|
return {
|
|
restrict: 'E',
|
|
require: REQUIRE_INJECTOR,
|
|
link: {
|
|
post: (scope: angular.IScope, element: angular.IAugmentedJQuery, attrs: angular.IAttributes,
|
|
parentInjector: any, transclude: angular.ITranscludeFunction): void => {
|
|
var domElement = <any>element[0];
|
|
var facade =
|
|
new DowngradeNg2ComponentAdapter(idPrefix + (idCount++), info, element, attrs, scope,
|
|
<Injector>parentInjector, parse, componentFactory);
|
|
facade.setupInputs();
|
|
facade.bootstrapNg2();
|
|
facade.projectContent();
|
|
facade.setupOutputs();
|
|
facade.registerCleanup();
|
|
}
|
|
}
|
|
};
|
|
}
|
|
return directiveFactory;
|
|
}
|
|
|
|
/**
|
|
* Use `UgradeAdapterRef` to control a hybrid AngularJS v1 / Angular v2 application.
|
|
*/
|
|
export class UpgradeAdapterRef {
|
|
/* @internal */
|
|
private _readyFn: (upgradeAdapterRef?: UpgradeAdapterRef) => void = null;
|
|
|
|
public ng1RootScope: angular.IRootScopeService = null;
|
|
public ng1Injector: angular.IInjectorService = null;
|
|
public ng2ApplicationRef: ApplicationRef = null;
|
|
public ng2Injector: Injector = null;
|
|
|
|
/* @internal */
|
|
private _bootstrapDone(applicationRef: ApplicationRef, ng1Injector: angular.IInjectorService) {
|
|
this.ng2ApplicationRef = applicationRef;
|
|
this.ng2Injector = applicationRef.injector;
|
|
this.ng1Injector = ng1Injector;
|
|
this.ng1RootScope = ng1Injector.get(NG1_ROOT_SCOPE);
|
|
this._readyFn && this._readyFn(this);
|
|
}
|
|
|
|
/**
|
|
* Register a callback function which is notified upon successful hybrid AngularJS v1 / Angular v2
|
|
* application has been bootstrapped.
|
|
*
|
|
* The `ready` callback function is invoked inside the Angular v2 zone, therefore it does not
|
|
* require a call to `$apply()`.
|
|
*/
|
|
public ready(fn: (upgradeAdapterRef?: UpgradeAdapterRef) => void) { this._readyFn = fn; }
|
|
|
|
/**
|
|
* Dispose of running hybrid AngularJS v1 / Angular v2 application.
|
|
*/
|
|
public dispose() {
|
|
this.ng1Injector.get(NG1_ROOT_SCOPE).$destroy();
|
|
this.ng2ApplicationRef.dispose();
|
|
}
|
|
}
|