angular2
Version:
Angular 2 - a web framework for modern web apps
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JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
import { isBlank, isPresent, CONST, getTypeNameForDebugging } from 'angular2/src/facade/lang';
import { BaseException } from 'angular2/src/facade/exceptions';
import { ListWrapper } from 'angular2/src/facade/collection';
import { Provider, SkipSelfMetadata, OptionalMetadata } from 'angular2/src/core/di';
/**
* A repository of different iterable diffing strategies used by NgFor, NgClass, and others.
*/
let IterableDiffers_1;
export let IterableDiffers = IterableDiffers_1 = class IterableDiffers {
constructor(factories) {
this.factories = factories;
}
static create(factories, parent) {
if (isPresent(parent)) {
var copied = ListWrapper.clone(parent.factories);
factories = factories.concat(copied);
return new IterableDiffers_1(factories);
}
else {
return new IterableDiffers_1(factories);
}
}
/**
* Takes an array of {@link IterableDifferFactory} and returns a provider used to extend the
* inherited {@link IterableDiffers} instance with the provided factories and return a new
* {@link IterableDiffers} instance.
*
* The following example shows how to extend an existing list of factories,
* which will only be applied to the injector for this component and its children.
* This step is all that's required to make a new {@link IterableDiffer} available.
*
* ### Example
*
* ```
* @Component({
* viewProviders: [
* IterableDiffers.extend([new ImmutableListDiffer()])
* ]
* })
* ```
*/
static extend(factories) {
return new Provider(IterableDiffers_1, {
useFactory: (parent) => {
if (isBlank(parent)) {
// Typically would occur when calling IterableDiffers.extend inside of dependencies passed
// to
// bootstrap(), which would override default pipes instead of extending them.
throw new BaseException('Cannot extend IterableDiffers without a parent injector');
}
return IterableDiffers_1.create(factories, parent);
},
// Dependency technically isn't optional, but we can provide a better error message this way.
deps: [[IterableDiffers_1, new SkipSelfMetadata(), new OptionalMetadata()]]
});
}
find(iterable) {
var factory = this.factories.find(f => f.supports(iterable));
if (isPresent(factory)) {
return factory;
}
else {
throw new BaseException(`Cannot find a differ supporting object '${iterable}' of type '${getTypeNameForDebugging(iterable)}'`);
}
}
};
IterableDiffers = IterableDiffers_1 = __decorate([
CONST(),
__metadata('design:paramtypes', [Array])
], IterableDiffers);