| // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| library web_components.custom_element_proxy; |
| |
| import 'dart:js' as js; |
| import 'package:initialize/initialize.dart'; |
| import 'interop.dart'; |
| |
| /// Annotation for a dart class which proxies a javascript custom element. |
| /// This will not work unless `interop_support.js` is loaded. |
| // TODO(jakemac): Add an @HtmlImport here to a new file which includes |
| // `interop_support.js`. We will need to point everything else at that html file |
| // as well for deduplication purposes (could even just copy it in as an inline |
| // script so the js file no longer exists?). |
| class CustomElementProxy implements Initializer<Type> { |
| final String tagName; |
| final String extendsTag; |
| |
| const CustomElementProxy(this.tagName, {this.extendsTag}); |
| |
| void initialize(Type t) { |
| registerDartType(tagName, t, extendsTag: extendsTag); |
| } |
| } |
| |
| /// A simple mixin to make it easier to interoperate with the Javascript API of |
| /// a browser object. This is mainly used by classes that expose a Dart API for |
| /// Javascript custom elements. |
| class CustomElementProxyMixin { |
| js.JsObject _proxy; |
| |
| js.JsObject get jsElement { |
| if (_proxy == null) { |
| _proxy = new js.JsObject.fromBrowserObject(this); |
| } |
| return _proxy; |
| } |
| } |