Converted Observatory source-link & script-ref elements

runtime/observatory/lib/src/elements/script_ref_wrapper.dart

+// Copyright (c) 2013, 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.
+
+import 'dart:html';
+import 'dart:async';
+
+import 'package:observatory/app.dart';
+import 'package:observatory/service_html.dart' show Script;
+import 'package:observatory/src/elements/script_ref.dart';
+import 'package:observatory/src/elements/helpers/tag.dart';
+import 'package:observatory/src/elements/shims/binding.dart';
+
+class ScriptRefElementWrapper extends HtmlElement {
+
+  static final binder = new Binder<ScriptRefElementWrapper>(
+    const [const Binding('ref')]);
+
+  static const tag = const Tag<ScriptRefElementWrapper>('script-ref');
+
+  Script _script;
+  Script get ref => _script;
+  set ref(Script script) { _script = script; render(); }
+
+  ScriptRefElementWrapper.created() : super.created() {
+    binder.registerCallback(this);
+    createShadowRoot();
+    render();
+  }
+
+  @override
+  void attached() {
+    super.attached();
+    render();
+  }
+
+  Future render() async {
+    shadowRoot.children = [];
+    if (_script == null) return;
+
+    shadowRoot.children = [
+      new StyleElement()
+        ..text = '@import "packages/observatory/src/elements/css/shared.css";',
+      new ScriptRefElement(_script.isolate, _script,
+                                 queue: ObservatoryApplication.app.queue)
+    ];
+  }
+}