angular-cn/modules/angular2/src/dom/generic_browser_adapter.ts

import {List, ListWrapper} from 'angular2/src/facade/collection';
import {isPresent, isFunction} from 'angular2/src/facade/lang';
import {DomAdapter} from './dom_adapter';

/**
 * Provides DOM operations in any browser environment.
 */
export class GenericBrowserDomAdapter extends DomAdapter {
  getDistributedNodes(el): List<Node> { return el.getDistributedNodes(); }
  resolveAndSetHref(el, baseUrl: string, href: string) {
    el.href = href == null ? baseUrl : baseUrl + '/../' + href;
  }
  cssToRules(css: string): List<any> {
    var style = this.createStyleElement(css);
    this.appendChild(this.defaultDoc().head, style);
    var rules = [];
    if (isPresent(style.sheet)) {
      // TODO(sorvell): Firefox throws when accessing the rules of a stylesheet
      // with an @import
      // https://bugzilla.mozilla.org/show_bug.cgi?id=625013
      try {
        var rawRules = (<any>style.sheet).cssRules;
        rules = ListWrapper.createFixedSize(rawRules.length);
        for (var i = 0; i < rawRules.length; i++) {
          rules[i] = rawRules[i];
        }
      } catch (e) {
        //
      }
    } else {
      // console.warn('sheet not found', style);
    }
    this.remove(style);
    return rules;
  }
  supportsDOMEvents(): boolean { return true; }
  supportsNativeShadowDOM(): boolean {
    return isFunction((<any>this.defaultDoc().body).createShadowRoot);
  }
}