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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;
+    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;
+    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;
+      _r.onRendered;
 
   M.ProfileTreeDirection _direction;
   ProfileTreeMode _mode;
   M.IsolateRef _isolate;
   M.SampleProfile _profile;
   Iterable<M.CallTreeNodeFilter> _filters;
 
   M.ProfileTreeDirection get direction => _direction;
   ProfileTreeMode get mode => _mode;
   M.IsolateRef get isolate => _isolate;
   M.SampleProfile get profile => _profile;
   Iterable<M.CallTreeNodeFilter> get filters => _filters;
 
   set direction(M.ProfileTreeDirection value) =>
       _direction = _r.checkAndReact(_direction, value);
   set mode(ProfileTreeMode value) => _mode = _r.checkAndReact(_mode, value);
   set filters(Iterable<M.CallTreeNodeFilter> value) {
     _filters = new List.unmodifiable(value);
     _r.dirty();
   }
 
-  factory CpuProfileVirtualTreeElement(M.IsolateRef isolate,
-      M.SampleProfile profile, {ProfileTreeMode mode: ProfileTreeMode.function,
+  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
+  @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 (filters != null) {
       tree = filters.fold(tree, (tree, filter) {
         return tree?.filtered(filter);
       });
     }
     if (tree == null) {
-      children = [
-        new HeadingElement.h1()..text = 'No Results'
-      ];
+      children = [new HeadingElement.h1()..text = 'No Results'];
       return;
     }
     _tree = new VirtualTreeElement(_createRow, update, _getChildren,
-      items: tree.root.children, queue: _r.queue);
+        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 = ['tree-item']
       ..children = [
-        new SpanElement()..classes = ['inclusive']
+        new SpanElement()
+          ..classes = ['inclusive']
           ..title = 'global % on stack',
-        new SpanElement()..classes = ['exclusive']
+        new SpanElement()
+          ..classes = ['exclusive']
           ..title = 'global % executing',
         new SpanElement()..classes = ['lines'],
-        new ButtonElement()..classes = ['expander']
+        new ButtonElement()
+          ..classes = ['expander']
           ..onClick.listen((_) => toggle(autoToggleSingleChildNodes: true)),
-        new SpanElement()..classes = ['percentage']
+        new SpanElement()
+          ..classes = ['percentage']
           ..title = 'tree node %',
         new SpanElement()..classes = ['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);
+  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 = ['name'];
+    element.children[4].text = Utils.formatPercentNormalized(item.percentage);
+    element.children[5] = new FunctionRefElement(
+        _isolate, item.profileFunction.function, queue: _r.queue)
+      ..classes = ['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);
+    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 = ['name'];
+    element.children[4].text = Utils.formatPercentNormalized(item.percentage);
+    element.children[5] = new CodeRefElement(_isolate, item.profileCode.code,
+        queue: _r.queue)..classes = ['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());
     }
   }
 }