Wrapping leaf nodes in non polymer elements

runtime/observatory/lib/src/elements/nav/vm_menu.dart

+// Copyright (c) 2016, 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 VM, IsolateRef;
+import 'package:observatory/src/elements/helpers/tag.dart';
+import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
+import 'package:observatory/src/elements/nav/menu.dart';
+import 'package:observatory/src/elements/nav/menu_item.dart';
+
+class NavVMMenuElement extends HtmlElement implements Renderable {
+  static const tag = const Tag<NavVMMenuElement>('nav-vm-menu',
+                     dependencies: const [NavMenuElement.tag,
+                                          NavMenuItemElement.tag]);
+
+  RenderingScheduler _r;
+
+  Stream<RenderedEvent<NavVMMenuElement>> get onRendered => _r.onRendered;
+
+  bool _last;
+  M.VM _vm;
+  bool get last => _last;
+  M.VM get vm => _vm;
+  set last(bool value) {
+    if (_last != value) {
+      _last = value;
+      _r.dirty();
+    } else {
+      _r.scheduleNotification();
+    }
+  }
+
+  factory NavVMMenuElement(M.VM vm, {bool last: false,
+                      RenderingQueue queue}) {
+    assert(vm != null);
+    assert(last != null);
+    NavVMMenuElement e = document.createElement(tag.name);
+    e._r = new RenderingScheduler(e, queue: queue);
+    e._vm = vm;
+    e._last = last;
+    return e;
+  }
+
+  NavVMMenuElement.created() : super.created() { createShadowRoot(); }
+
+  @override
+  void attached() { super.attached(); _r.enable(); }
+
+  @override
+  void detached() {
+    super.detached(); _r.disable(notify: true);
+    shadowRoot.children = [];
+  }
+
+  void render() {
+    /// TODO(cbernaschina) restore the format '${name}@${target.networkAddress}'
+    shadowRoot.children = [
+      new NavMenuElement(vm.name, last: last, queue: _r.queue, link: '/vm')
+        ..children = (
+          _vm.isolates.map((M.IsolateRef isolate) {
+            return new NavMenuItemElement(isolate.name, queue: _r.queue,
+                link: '/inspect?isolateId=${Uri.encodeComponent(isolate.id)}');
+          }).toList()
+          ..add(new ContentElement())
+        )
+    ];
+  }
+}
+
+/*
+@CustomTag('vm-nav-menu')
+class VMNavMenuElement extends ObservatoryElement {
+  @published bool last = false;
+  @published VM vm;
+
+  String nameAndAddress(name, target) {
+    if (name != null && target != null) {
+      return '${name}@${target.networkAddress}';
+    } else {
+      return '<initializing>';
+    }
+  }
+
+  VMNavMenuElement.created() : super.created();
+}
+ */
+/*
+<polymer-element name="vm-nav-menu">
+  <template>
+    <nav-menu link="/vm" anchor="{{ nameAndAddress(vm.name, vm.target) }}" last="{{ last }}">
+      <template repeat="{{ isolate in vm.isolates }}">
+        <nav-menu-item link="{{ makeLink('/inspect', isolate) }}"
+                       anchor="{{ isolate.name }}"></nav-menu-item>
+      </template>
+      <content></content>
+    </nav-menu>
+  </template>
+</polymer-element>
+*/