457c15cd6c
In 'angular2/di' the symbol: - Inject is a decorator - InjectAnnotation is an annotation Internally one an get a hold of annotations without *Annotations appened (to make ts2dart work without workarounds) by importing from 'angular2/src/di/annotations_impl' instead of 'angular2/di'. This is needed only for users that transpile through TS and through ts2dart.
50 lines
1.6 KiB
JavaScript
50 lines
1.6 KiB
JavaScript
import {Injectable} from 'angular2/src/di/annotations_impl';
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import {isBlank, isPresent, BaseException, stringify} from 'angular2/src/facade/lang';
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import {Map, MapWrapper, StringMapWrapper, StringMap} from 'angular2/src/facade/collection';
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import {PromiseWrapper, Promise} from 'angular2/src/facade/async';
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import {DOM} from 'angular2/src/dom/dom_adapter';
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import {XHR} from 'angular2/src/services/xhr';
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import {ViewDefinition} from '../../api';
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import {UrlResolver} from 'angular2/src/services/url_resolver';
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/**
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* Strategy to load component templates.
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* TODO: Make public API once we are more confident in this approach.
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*/
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@Injectable()
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export class TemplateLoader {
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_xhr: XHR;
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_htmlCache: StringMap;
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constructor(xhr: XHR, urlResolver: UrlResolver) {
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this._xhr = xhr;
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this._htmlCache = StringMapWrapper.create();
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}
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load(template: ViewDefinition):Promise {
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if (isPresent(template.template)) {
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return PromiseWrapper.resolve(DOM.createTemplate(template.template));
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}
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var url = template.absUrl;
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if (isPresent(url)) {
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var promise = StringMapWrapper.get(this._htmlCache, url);
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if (isBlank(promise)) {
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promise = this._xhr.get(url).then(function (html) {
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var template = DOM.createTemplate(html);
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return template;
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});
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StringMapWrapper.set(this._htmlCache, url, promise);
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}
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// We need to clone the result as others might change it
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// (e.g. the compiler).
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return promise.then( (tplElement) => DOM.clone(tplElement) );
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}
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throw new BaseException('View should have either the url or template property set');
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}
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}
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