Converted Observatory instance-view element

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

Index: runtime/observatory/lib/src/elements/sentinel_view.dart
diff --git a/runtime/observatory/lib/src/elements/sentinel_view.dart b/runtime/observatory/lib/src/elements/sentinel_view.dart
new file mode 100644
index 0000000000000000000000000000000000000000..4fcc00d64c1de279fe1f4ddec021efb3089ce222
--- /dev/null
+++ b/runtime/observatory/lib/src/elements/sentinel_view.dart
@@ -0,0 +1,122 @@
+// 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;
+import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
+import 'package:observatory/src/elements/helpers/tag.dart';
+import 'package:observatory/src/elements/nav/bar.dart';
+import 'package:observatory/src/elements/nav/isolate_menu.dart';
+import 'package:observatory/src/elements/nav/menu.dart';
+import 'package:observatory/src/elements/nav/notify.dart';
+import 'package:observatory/src/elements/nav/top_menu.dart';
+import 'package:observatory/src/elements/nav/vm_menu.dart';
+import 'package:observatory/src/elements/view_footer.dart';
+
+
+class SentinelViewElement extends HtmlElement implements Renderable {
+  static const tag = const Tag<SentinelViewElement>('sentinel-view',
+                                                    dependencies: const [
+                                                      NavBarElement.tag,
+                                                      NavTopMenuElement.tag,
+                                                      NavVMMenuElement.tag,
+                                                      NavIsolateMenuElement.tag,
+                                                      NavMenuElement.tag,
+                                                      NavNotifyElement.tag,
+                                                      ViewFooterElement.tag
+                                                    ]);
+
+  RenderingScheduler<SentinelViewElement> _r;
+
+  Stream<RenderedEvent<SentinelViewElement>> get onRendered => _r.onRendered;
+
+  M.VM _vm;
+  M.IsolateRef _isolate;
+  M.Sentinel _sentinel;
+  M.EventRepository _events;
+  M.NotificationRepository _notifications;
+
+  M.Sentinel get sentinel => _sentinel;
+
+  factory SentinelViewElement(M.VM vm, M.IsolateRef isolate, M.Sentinel sentinel,
+                              M.EventRepository events,
+                              M.NotificationRepository notifications,
+                              {RenderingQueue queue}) {
+    assert(vm != null);
+    assert(isolate != null);
+    assert(sentinel != null);
+    assert(events != null);
+    assert(notifications != null);
+    SentinelViewElement e = document.createElement(tag.name);
+    e._r = new RenderingScheduler(e, queue: queue);
+    e._vm = vm;
+    e._isolate = isolate;
+    e._sentinel = sentinel;
+    e._events = events;
+    e._notifications = notifications;
+    return e;
+  }
+
+  SentinelViewElement.created() : super.created();
+
+  @override
+  void attached() {
+    super.attached();
+    _r.enable();
+  }
+
+  @override
+  void detached() {
+    super.detached();
+    _r.disable(notify: true);
+    text = '';
+    title = '';
+  }
+
+  void render() {
+    children = [
+      new NavBarElement(queue: _r.queue)
+        ..children = [
+          new NavTopMenuElement(queue: _r.queue),
+          new NavVMMenuElement(_vm, _events, queue: _r.queue),
+          new NavIsolateMenuElement(_isolate, _events, queue: _r.queue),
+          new NavMenuElement('sentinel', last: true, queue: _r.queue),
+          new NavNotifyElement(_notifications, queue: _r.queue)
+        ],
+      new DivElement()..classes = const ['content-centered-big']
+        ..children = [
+          new HeadingElement.h2()
+            ..text = 'Sentinel: #{_sentinel.valueAsString}',
+          new HRElement(),
+          new DivElement()
+            ..text = _sentinelKindToDescription(_sentinel.kind),
+          new HRElement(),
+          new ViewFooterElement(queue: _r.queue)
+        ]
+    ];
+  }
+
+  static String _sentinelKindToDescription(M.SentinelKind kind) {
+    switch (kind) {
+      case M.SentinelKind.collected:
+        return 'This object has been reclaimed by the garbage collector.';
+      case M.SentinelKind.expired:
+        return 'The handle to this object has expired. '
+               'Consider refreshing the page.';
+      case M.SentinelKind.notInitialized:
+        return 'This object will be initialized once it is accessed by '
+               'the program.';
+      case M.SentinelKind.initializing:
+        return 'This object is currently being initialized.';
+      case M.SentinelKind.optimizedOut:
+        return 'This object is no longer needed and has been removed by the '
+               'optimizing compiler.';
+      case M.SentinelKind.free:
+        return '';
+    }
+    throw new Exception('Unknown SentinelKind: $kind');
+  }
+
+}