Converted Observatory cpu-profile element

runtime/observatory/lib/src/elements/cpu_profile/virtual_tree.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:async';
+import 'dart:html';
+import 'dart:math' as Math;
+import 'package:observatory/models.dart' as M;
+import 'package:observatory/src/elements/stack_trace_tree_config.dart'
+  show ProfileTreeMode;
+import 'package:observatory/src/elements/code_ref.dart';
+import 'package:observatory/src/elements/containers/virtual_tree.dart';
+import 'package:observatory/src/elements/function_ref.dart';
+import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
+import 'package:observatory/src/elements/helpers/tag.dart';
+import 'package:observatory/utils.dart';
+
+export 'package:observatory/src/elements/stack_trace_tree_config.dart'
+  show ProfileTreeMode;
+
+class CpuProfileVirtualTreeElement extends HtmlElement implements Renderable {
+  static const tag =
+      const Tag<CpuProfileVirtualTreeElement>('cpu-profile-virtual-tree');
+
+  RenderingScheduler<CpuProfileVirtualTreeElement> _r;
+
+  Stream<RenderedEvent<CpuProfileVirtualTreeElement>> get onRendered =>
+                                                                  _r.onRendered;
+
+  M.ProfileTreeDirection _direction;
+  ProfileTreeMode _mode;
+  M.IsolateRef _isolate;
+  M.SampleProfile _profile;
+  M.CallTreeNodeFilter _filter;
+
+  M.ProfileTreeDirection get direction => _direction;
+  ProfileTreeMode get mode => _mode;
+  M.IsolateRef get isolate => _isolate;
+  M.SampleProfile get profile => _profile;
+  M.CallTreeNodeFilter get filter => _filter;
+
+  set direction(M.ProfileTreeDirection value) =>
+      _direction = _r.checkAndReact(_direction, value);
+  set mode(ProfileTreeMode value) => _mode = _r.checkAndReact(_mode, value);
+  set filter(M.CallTreeNodeFilter value) =>
+      _filter = _r.checkAndReact(_filter, value);
+
+  factory CpuProfileVirtualTreeElement(M.IsolateRef isolate,
+      M.SampleProfile profile, {ProfileTreeMode mode: ProfileTreeMode.function,
+      M.ProfileTreeDirection direction: M.ProfileTreeDirection.exclusive,
+      RenderingQueue queue}) {
+    assert(isolate != null);
+    assert(profile != null);
+    assert(mode != null);
+    assert(direction != null);
+    CpuProfileVirtualTreeElement e = document.createElement(tag.name);
+    e._r = new RenderingScheduler(e, queue: queue);
+    e._isolate = isolate;
+    e._profile = profile;
+    e._mode = mode;
+    e._direction = direction;
+    return e;
+  }
+
+  CpuProfileVirtualTreeElement.created() : super.created();
+
+  @override
+  attached() {
+    super.attached();
+    _r.enable();
+  }
+
+ @override
+  detached() {
+    super.detached();
+    _r.disable(notify: true);
+    children = [];
+  }
+
+  VirtualTreeElement _tree;
+
+  void render() {
+    var tree;
+    var update;
+    switch (mode) {
+      case ProfileTreeMode.code:
+        tree = _profile.loadCodeTree(_direction);
+        update = _updateCodeRow;
+        break;
+      case ProfileTreeMode.function:
+        tree = _profile.loadFunctionTree(_direction);
+        update = _updateFunctionRow;
+        break;
+      default:
+        throw new Exception('Unknown ProfileTreeMode: $mode');
+    }
+    if (tree == null) {
+      children = [
+        new HeadingElement.h1()..text = 'No Results'
+      ];
+      return;
+    }
+    if (filter != null) {
+      tree = tree.filtered(filter);
+    }
+    _tree = new VirtualTreeElement(_createRow, update, _getChildren,
+      items: tree.root.children, queue: _r.queue);
+    if (tree.root.children.length == 1) {
+      _tree.expand(tree.root.children.first, autoExpandSingleChildNodes: true);
+    }
+    children = [_tree];
+  }
+
+  static Element _createRow(toggle) {
+    return new DivElement()
+      ..classes = const ['tree-item']
+      ..children = [
+        new SpanElement()..classes = const ['inclusive']
+          ..title = 'global % on stack',
+        new SpanElement()..classes = const ['exclusive']
+          ..title = 'global % executing',
+        new SpanElement()..classes = const ['lines'],
+        new ButtonElement()..classes = const ['expander']
+          ..onClick.listen((_) => toggle(autoToggleSingleChildNodes: true)),
+        new SpanElement()..classes = const ['percentage']
+          ..title = 'tree node %',
+        new SpanElement()..classes = const ['name']
+      ];
+  }
+
+  static _getChildren(M.CallTreeNode node) => node.children;
+
+  void _updateFunctionRow(HtmlElement element, M.FunctionCallTreeNode item,
+      int depth) {
+    element.children[0].text = Utils.formatPercentNormalized(
+        item.profileFunction.normalizedInclusiveTicks);
+    element.children[1].text = Utils.formatPercentNormalized(
+        item.profileFunction.normalizedExclusiveTicks);
+    _updateLines(element.children[2].children, depth);
+    if (item.children.isNotEmpty) {
+      element.children[3].text = _tree.isExpanded(item) ? '▼' : '►';
+    } else {
+      element.children[3].text = '';
+    }
+    element.children[4].text = Utils.formatPercentNormalized(
+        item.percentage);
+    element.children[5] = new FunctionRefElement(_isolate,
+            item.profileFunction.function, queue: _r.queue)
+            ..classes = const ['name'];
+  }
+
+  void _updateCodeRow(HtmlElement element, M.CodeCallTreeNode item, int depth) {
+    element.children[0].text = Utils.formatPercentNormalized(
+        item.profileCode.normalizedInclusiveTicks);
+    element.children[1].text = Utils.formatPercentNormalized(
+        item.profileCode.normalizedExclusiveTicks);
+    _updateLines(element.children[2].children, depth);
+    if (item.children.isNotEmpty) {
+      element.children[3].text = _tree.isExpanded(item) ? '▼' : '►';
+    } else {
+      element.children[3].text = '';
+    }
+    element.children[4].text = Utils.formatPercentNormalized(
+        item.percentage);
+    element.children[5] = new CodeRefElement(_isolate,
+        item.profileCode.code, queue: _r.queue)
+        ..classes = const ['name'];
+  }
+
+  static _updateLines(List<Element> lines, int n) {
+    n = Math.max(0, n);
+    while (lines.length > n) {
+      lines.removeLast();
+    }
+    while (lines.length < n) {
+      lines.add(new SpanElement());
+    }
+  }
+}