Converted Observatory class-tree element

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

 // Copyright (c) 2014, 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.
 
 library class_tree_element;
 
-import 'observatory_element.dart';
+import 'dart:html';
 import 'dart:async';
-import 'dart:html';
-import 'package:logging/logging.dart';
-import 'package:observatory/app.dart';
-import 'package:observatory/service.dart';
-import 'package:polymer/polymer.dart';
-
-class ClassTreeRow extends TableTreeRow {
-  @reflectable final Isolate isolate;
-  @reflectable final Class cls;
-  ClassTreeRow(this.isolate, this.cls, TableTree tree, ClassTreeRow parent)
-      : super(tree, parent) {
-    assert(isolate != null);
-    assert(cls != null);
-  }
-
-  void _addChildren(List<Class> subclasses) {
-    for (var subclass in subclasses) {
-      if (subclass.isPatch) {
-        continue;
-      }
-      if (subclass.mixin != null) {
-        _addChildren(subclass.subclasses);
-      } else {
-        var row = new ClassTreeRow(isolate, subclass, tree, this);
-        children.add(row);
-      }
-    }
-  }
-
-  Future _addMixins(Class cls) async {
-    var classCell = flexColumns[0];
-    if (cls.superclass == null) {
-      return;
-    }
-    bool first = true;
-    while (cls.superclass != null && cls.superclass.mixin != null) {
-      cls = cls.superclass;
-      await cls.mixin.load();
-      var span = new SpanElement();
-      span.style.alignSelf = 'center';
-      span.style.whiteSpace = 'pre';
-      if (first) {
-        span.text = ' with ';
-      } else {
-        span.text = ', ';
-      }
-      classCell.children.add(span);
-      var mixinRef = new Element.tag('class-ref');
-      mixinRef.ref = cls.mixin.typeClass;
-      mixinRef.style.alignSelf = 'center';
-      classCell.children.add(mixinRef);
-      first = false;
-    }
-  }
-
-  Future _addClass(Class cls) async {
-    var classCell = flexColumns[0];
-    classCell.style.justifyContent = 'flex-start';
-    var classRef = new Element.tag('class-ref');
-    classRef.ref = cls;
-    classRef.style.alignSelf = 'center';
-    classCell.children.add(classRef);
-    if (cls.superclass != null && cls.superclass.mixin != null) {
-      await _addMixins(cls);
-    }
-    if (cls.subclasses.isNotEmpty) {
-      var span = new SpanElement();
-      span.style.paddingLeft = '.5em';
-      span.style.alignSelf = 'center';
-      int subclassCount = _indirectSubclassCount(cls) - 1;
-      if (subclassCount > 1) {
-        span.text = '($subclassCount subclasses)';
-      } else {
-        span.text = '($subclassCount subclass)';
-      }
-      classCell.children.add(span);
-    }
-  }
-
-  void onShow() {
-    super.onShow();
-    if (children.length == 0) {
-      _addChildren(cls.subclasses);
-    }
-    _addClass(cls);
-  }
-
-  static int _indirectSubclassCount(var cls) {
-    int count = 0;
-    if (cls.mixin == null) {
-      // Don't count synthetic mixin classes in subclass count.
-      count++;
-    }
-    for (var subclass in cls.subclasses) {
-      count += _indirectSubclassCount(subclass);
-    }
-    return count;
-  }
-
-  bool hasChildren() {
-    return cls.subclasses.isNotEmpty;
-  }
-}
+import 'package:observatory/models.dart' as M;
+import 'package:observatory/src/elements/class_ref.dart';
+import 'package:observatory/src/elements/containers/virtual_tree.dart';
+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';
+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';
 
 
-@CustomTag('class-tree')
-class ClassTreeElement extends ObservatoryElement {
-  @observable Isolate isolate;
+class ClassTreeElement extends HtmlElement implements Renderable{
+  static const tag = const Tag<ClassTreeElement>('class-tree',
+                     dependencies: const [ClassRefElement.tag,
+                                          NavBarElement.tag,
+                                          NavIsolateMenuElement.tag,
+                                          NavMenuElement.tag,
+                                          NavNotifyElement.tag,
+                                          NavTopMenuElement.tag,
+                                          NavVMMenuElement.tag,
+                                          VirtualTreeElement.tag]);
 
-  TableTree tree;
+  RenderingScheduler _r;
+
+  Stream<RenderedEvent<ClassTreeElement>> get onRendered => _r.onRendered;
+
+  M.VMRef _vm;
+  M.IsolateRef _isolate;
+  M.EventRepository _events;
+  M.NotificationRepository _notifications;
+  M.ClassRepository _classes;
+  M.Class _object;
+  final _subclasses = <String, Iterable<M.Class>>{};
+  final _mixins = <String, List<M.Instance>>{};
+
+  factory ClassTreeElement(M.VMRef vm, M.IsolateRef isolate,
+                           M.EventRepository events,
+                           M.NotificationRepository notifications,
+                           M.ClassRepository classes,
+                           {RenderingQueue queue}) {
+    assert(vm != null);
+    assert(isolate != null);
+    assert(events != null);
+    assert(notifications != null);
+    assert(classes != null);
+    ClassTreeElement e = document.createElement(tag.name);
+    e._r = new RenderingScheduler(e, queue: queue);
+    e._vm = vm;
+    e._isolate = isolate;
+    e._events = events;
+    e._notifications = notifications;
+    e._classes = classes;
+    return e;
+  }
 
   ClassTreeElement.created() : super.created();
 
   @override
   void attached() {
     super.attached();
-    var tableBody = shadowRoot.querySelector('#tableTreeBody');
-    assert(tableBody != null);
-    tree = new TableTree(tableBody, 1);
-    if (isolate != null) {
-      _update(isolate.objectClass);
+    _refresh();
+    _r.enable();
+  }
+
+  @override
+  void detached() {
+    super.detached();
+    children = [];
+    _r.disable(notify: true);
+  }
+
+  VirtualTreeElement _tree;
+
+  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('class hierarchy', link: Uris.classTree(_isolate),
+                             last: true, queue: _r.queue),
+          new NavNotifyElement(_notifications, queue: _r.queue)
+        ],
+      new DivElement()
+        ..classes = ['content-centered']
+        ..children = [
+          new HeadingElement.h1()..text = 'Class Hierarchy',
+          new BRElement(), new HRElement(),
+          _object == null ? (new HeadingElement.h2()..text = 'Loading...')
+                          : _createTree()
+        ]
+    ];
+  }
+
+  Element _createTree() {
+    _tree = new VirtualTreeElement(_create, _update, _children,
+                                   items: [_object], queue: _r.queue);
+    _tree.expand(_object, autoExpandSingleChildNodes: true);
+    return _tree;
+  }
+
+  Future _refresh() async {
+    _object = null;
+    _subclasses.clear();
+    _mixins.clear();
+    _object = await _register(await _classes.getObject());
+    _r.dirty();
+  }
+
+  Future<M.Class> _register(M.Class cls) async {
+    _subclasses[cls.id] = await Future.wait(
+      (await Future.wait(cls.subclasses.map(_getActualChildrens)))
+      .expand((f) => f)
+      .map(_register)
+    );
+    return cls;
+  }
+
+  Future<Iterable<M.Class>> _getActualChildrens(M.ClassRef ref) async {
+    var cls = await _classes.get(ref.id);
+    if (cls.isPatch) {
+      return const [];
+    }
+    if (cls.mixin == null) {
+      return [cls];
+    }
+    return (await Future.wait(cls.subclasses.map(_getActualChildrens)))
+      .expand((f) => f)
+      ..forEach((subcls) {
+        _mixins[subcls.id] = (_mixins[subcls.id] ?? [])..add(cls.mixin);
+      });
+  }
+
+  static Element _create(toggle) {
+    return new DivElement()..classes = ['class-tree-item']
+        ..children = [
+          new SpanElement()..classes = ['lines'],
+          new SpanElement()..classes = ['expander']
+            ..onClick.listen((_) => toggle(autoToggleSingleChildNodes: true)),
+          new SpanElement()..classes = ['name']
+        ];
+  }
+
+  void _update(HtmlElement el, M.Class cls, int index) {
+    virtualTreeUpdateLines(el.children[0], index);
+    if (cls.subclasses.isEmpty) {
+      el.children[1].text = '';
+    } else {
+      el.children[1].text = _tree.isExpanded(cls) ? '▼' : '►';
+    }
+    el.children[2].children = [
+      new ClassRefElement(_isolate, cls, queue: _r.queue)
+    ];
+    if (_mixins[cls.id] != null) {
+      el.children[2].children.addAll(_createMixins(_mixins[cls.id]));
     }
   }
 
-  isolateChanged(oldValue) {
-    isolate.getClassHierarchy().then((objectClass) {
-      _update(objectClass);
-    });
+  List<Element> _createMixins(List<M.Instance> types) {
+    final  children = types.expand((type) => [
+      new SpanElement()..text = ', ',
+      type.typeClass == null
+          ? (new SpanElement()..text = type.name.split('<').first)
+          : new ClassRefElement(_isolate, type.typeClass, queue: _r.queue)
+    ]).toList();
+    children.first.text = ' with ';
+    return children;
   }
 
-  void _update(Class root) {
-    try {
-      var rootRow = new ClassTreeRow(isolate, root, tree, null);
-      rootRow.children.add(new ClassTreeRow(isolate, root, tree, rootRow));
-      tree.initialize(rootRow);
-    } catch (e, stackTrace) {
-      Logger.root.warning('_update', e, stackTrace);
-    }
-    // Check if we only have one node at the root and expand it.
-    if (tree.rows.length == 1) {
-      tree.toggle(tree.rows[0]);
-    }
-    notifyPropertyChange(#tree, null, tree);
+  Iterable<M.Class> _children(M.Class cls) {
+    return _subclasses[cls.id];
   }
 }