Converted Observatory class-view element

runtime/observatory/lib/src/elements/top_retaining_instances.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;
+import 'package:observatory/src/elements/curly_block.dart';
+import 'package:observatory/src/elements/instance_ref.dart';
+import 'package:observatory/src/elements/helpers/any_ref.dart';
+import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
+import 'package:observatory/src/elements/helpers/tag.dart';
+import 'package:observatory/utils.dart';
+
+class TopRetainingInstancesElement extends HtmlElement implements Renderable {
+  static const tag = const Tag<TopRetainingInstancesElement>(
+    'top-retainig-instances',
+    dependencies: const [
+        CurlyBlockElement.tag,
+        InstanceRefElement.tag
+    ]);
+
+  RenderingScheduler<TopRetainingInstancesElement> _r;
+
+  Stream<RenderedEvent<TopRetainingInstancesElement>> get onRendered =>
+    _r.onRendered;
+
+  M.IsolateRef _isolate;
+  M.ClassRef _cls;
+  M.TopRetainingInstancesRepository _topRetainingInstances;
+  M.InstanceRepository _instances;
+  Iterable<M.RetainingObject> _topRetaining;
+  bool _expanded = false;
+
+  M.IsolateRef get isolate => _isolate;
+  M.ClassRef get cls => _cls;
+
+  factory TopRetainingInstancesElement(M.IsolateRef isolate, M.ClassRef cls,
+      M.TopRetainingInstancesRepository topRetainingInstances,
+      M.InstanceRepository instances,
+      {RenderingQueue queue}) {
+    assert(isolate != null);
+    assert(cls != null);
+    assert(topRetainingInstances != null);
+    assert(instances != null);
+    TopRetainingInstancesElement e = document.createElement(tag.name);
+    e._r = new RenderingScheduler(e, queue: queue);
+    e._isolate = isolate;
+    e._cls = cls;
+    e._topRetainingInstances = topRetainingInstances;
+    e._instances = instances;
+    return e;
+  }
+
+  TopRetainingInstancesElement.created() : super.created();
+
+  @override
+  void attached() {
+    super.attached();
+    _r.enable();
+  }
+
+  @override
+  void detached() {
+    super.detached();
+    children = [];
+    _r.disable(notify: true);
+  }
+
+  void render() {
+    children = [
+      new CurlyBlockElement(expanded: _expanded, queue: _r.queue)
+        ..children = [
+          new DivElement()..classes = ['memberList']
+            ..children = _createContent()
+        ]
+        ..onToggle.listen((e) async {
+          _expanded = e.control.expanded;
+          if (_expanded) {
+            e.control.disabled = true;
+            await _refresh();
+            e.control.disabled = false;
+          }
+        })
+    ];
+  }
+
+  Future _refresh() async {
+    _topRetaining = null;
+    _topRetaining = await _topRetainingInstances.get(_isolate, _cls);
+    _r.dirty();
+  }
+
+  List<Element> _createContent() {
+    if (_topRetaining == null) {
+      return [
+        new SpanElement()..text = 'Loading...'
+      ];
+    }
+    return _topRetaining.map((r) =>
+      new DivElement()..classes = ['memberItem']
+        ..children = [
+          new DivElement()..classes = ['memberName']
+            ..text = '${Utils.formatSize(r.retainedSize)} ',
+          new DivElement()..classes = ['memberValue']
+            ..children = [
+              anyRef(_isolate, r.object, _instances, queue: _r.queue)
+            ]
+        ]
+    ).toList();
+  }
+}