Converted Observatory refs elements

runtime/observatory/lib/src/elements/local_var_descriptors_ref.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/models.dart' as M
+  show IsolateRef, LocalVarDescriptorsRef;
+import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
+import 'package:observatory/src/elements/helpers/tag.dart';
+import 'package:observatory/src/elements/helpers/uris.dart';
+
+class LocalVarDescriptorsRefElement extends HtmlElement implements Renderable {
+  static const tag = const Tag<LocalVarDescriptorsRefElement>('var-ref');
+
+  RenderingScheduler<LocalVarDescriptorsRefElement> _r;
+
+  Stream<RenderedEvent<LocalVarDescriptorsRefElement>> get onRendered =>
+      _r.onRendered;
+
+  M.IsolateRef _isolate;
+  M.LocalVarDescriptorsRef _localVar;
+
+  M.IsolateRef get isolate => _isolate;
+  M.LocalVarDescriptorsRef get localVar => _localVar;
+
+  factory LocalVarDescriptorsRefElement(M.IsolateRef isolate,
+      M.LocalVarDescriptorsRef localVar, {RenderingQueue queue}) {
+    assert(isolate != null);
+    assert(localVar != null);
+    LocalVarDescriptorsRefElement e = document.createElement(tag.name);
+    e._r = new RenderingScheduler(e, queue: queue);
+    e._isolate = isolate;
+    e._localVar = localVar;
+    return e;
+  }
+
+  LocalVarDescriptorsRefElement.created() : super.created();
+
+  @override
+  void attached() {
+    super.attached();
+    _r.enable();
+  }
+
+  @override
+  void detached() {
+    super.detached();
+    _r.disable(notify: true);
+    children = [];
+  }
+
+  void render() {
+    final text = (_localVar.name == null || _localVar.name == '')
+      ? 'LocalVarDescriptors'
+      : _localVar.name;
+    children = [
+      new AnchorElement(href: Uris.inspect(_isolate, object: _localVar))
+        ..text = text
+    ];
+  }
+}