Build Observatory as part of runtime

runtime/bin/vmservice/observatory/lib/src/elements/isolate_profile.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.
-
-library isolate_profile_element;
-
-import 'dart:html';
-import 'observatory_element.dart';
-import 'package:logging/logging.dart';
-import 'package:observatory/service.dart';
-import 'package:observatory/app.dart';
-import 'package:polymer/polymer.dart';
-
-class ProfileCodeTrieNodeTreeRow extends TableTreeRow {
-  final ServiceMap profile;
-  @reflectable final CodeTrieNode root;
-  @reflectable final CodeTrieNode node;
-  @reflectable Code get code => node.code;
-
-  @reflectable String tipKind = '';
-  @reflectable String tipParent = '';
-  @reflectable String tipExclusive = '';
-  @reflectable String tipTicks = '';
-  @reflectable String tipTime = '';
-
-  ProfileCodeTrieNodeTreeRow(this.profile, this.root, this.node,
-                             ProfileCodeTrieNodeTreeRow parent)
-      : super(parent) {
-    assert(root != null);
-    assert(node != null);
-    tipTicks = '${node.count}';
-    var period = profile['period'];
-    var MICROSECONDS_PER_SECOND = 1000000.0;
-    var seconds = (period * node.count) / MICROSECONDS_PER_SECOND; // seconds
-    tipTime = Utils.formatTimePrecise(seconds);
-    if (code.kind == CodeKind.Tag) {
-      tipKind = 'Tag (category)';
-      if (parent == null) {
-        tipParent = Utils.formatPercent(node.count, root.count);
-      } else {
-        tipParent = Utils.formatPercent(node.count, parent.node.count);
-      }
-      tipExclusive = Utils.formatPercent(node.count, root.count);
-    } else {
-      if ((code.kind == CodeKind.Collected) ||
-          (code.kind == CodeKind.Reused)) {
-        tipKind = 'Garbage Collected Code';
-      } else {
-        tipKind = '${code.kind} (Function)';
-      }
-      if (parent == null) {
-        tipParent = Utils.formatPercent(node.count, root.count);
-      } else {
-        tipParent = Utils.formatPercent(node.count, parent.node.count);
-      }
-      tipExclusive = Utils.formatPercent(node.code.exclusiveTicks, root.count);
-    }
-    columns.add(tipParent);
-    columns.add(tipExclusive);
-  }
-
-  bool shouldDisplayChild(CodeTrieNode childNode, double threshold) {
-    return ((childNode.count / node.count) > threshold) ||
-            ((childNode.code.exclusiveTicks / root.count) > threshold);
-  }
-
-  void onShow() {
-    var threshold = profile['threshold'];
-    if (children.length > 0) {
-      // Child rows already created.
-      return;
-    }
-    for (var childNode in node.children) {
-      if (!shouldDisplayChild(childNode, threshold)) {
-        continue;
-      }
-      var row = new ProfileCodeTrieNodeTreeRow(profile, root, childNode, this);
-      children.add(row);
-    }
-  }
-
-  void onHide() {
-  }
-
-  bool hasChildren() {
-    return node.children.length > 0;
-  }
-}
-
-/// Displays an IsolateProfile
-@CustomTag('isolate-profile')
-class IsolateProfileElement extends ObservatoryElement {
-  IsolateProfileElement.created() : super.created();
-  @published ServiceMap profile;
-  @observable bool hideTagsChecked;
-  @observable String sampleCount = '';
-  @observable String refreshTime = '';
-  @observable String sampleRate = '';
-  @observable String sampleDepth = '';
-  @observable String displayCutoff = '';
-  @observable String timeSpan = '';
-  @reflectable double displayThreshold = 0.0002; // 0.02%.
-
-  @observable String tagSelector = 'uv';
-
-  final _id = '#tableTree';
-  TableTree tree;
-
-  static const MICROSECONDS_PER_SECOND = 1000000.0;
-
-  void profileChanged(oldValue) {
-    if (profile == null) {
-      return;
-    }
-    var totalSamples = profile['samples'];
-    var now = new DateTime.now();
-    sampleCount = totalSamples.toString();
-    refreshTime = now.toString();
-    sampleDepth = profile['depth'].toString();
-    var period = profile['period'];
-    sampleRate = (MICROSECONDS_PER_SECOND / period).toStringAsFixed(0);
-    timeSpan = formatTime(profile['timeSpan']);
-    displayCutoff = '${(displayThreshold * 100.0).toString()}%';
-    profile.isolate.processProfile(profile);
-    profile['threshold'] = displayThreshold;
-    _update();
-  }
-
-
-  @override
-  void attached() {
-    super.attached();
-    tree = new TableTree();
-    _update();
-  }
-
-  void tagSelectorChanged(oldValue) {
-    refresh(null);
-  }
-
-  void refresh(var done) {
-    var request = 'profile?tags=$tagSelector';
-    profile.isolate.get(request).then((ServiceMap m) {
-      // Assert we got back the a profile.
-      assert(m.type == 'Profile');
-      profile = m;
-    }).whenComplete(done);
-  }
-
-  void _update() {
-    if (profile == null) {
-      return;
-    }
-    _buildTree();
-  }
-
-  void _buildStackTree() {
-    var root = profile.isolate.profileTrieRoot;
-    if (root == null) {
-      return;
-    }
-    try {
-      tree.initialize(
-          new ProfileCodeTrieNodeTreeRow(profile, root, root, null));
-    } catch (e, stackTrace) {
-      Logger.root.warning('_buildStackTree', e, stackTrace);
-    }
-    // Check if we only have one node at the root and expand it.
-    if (tree.rows.length == 1) {
-      tree.toggle(0);
-    }
-    notifyPropertyChange(#tree, null, tree);
-  }
-
-  void _buildTree() {
-    _buildStackTree();
-  }
-
-  @observable String padding(TableTreeRow row) {
-    return 'padding-left: ${row.depth * 16}px;';
-  }
-
-  @observable String coloring(TableTreeRow row) {
-    const colors = const ['rowColor0', 'rowColor1', 'rowColor2', 'rowColor3',
-                          'rowColor4', 'rowColor5', 'rowColor6', 'rowColor7',
-                          'rowColor8'];
-    var index = (row.depth - 1) % colors.length;
-    return colors[index];
-  }
-
-  @observable void toggleExpanded(Event e, var detail, Element target) {
-    // We only want to expand a tree row if the target of the click is
-    // the table cell (passed in as target) or the span containing the
-    // expander symbol (#expand).
-    var eventTarget = e.target;
-    if ((eventTarget.id != 'expand') && (e.target != target)) {
-      // Target of click was not the expander span or the table cell.
-      return;
-    }
-    var row = target.parent;
-    if (row is TableRowElement) {
-      // Subtract 1 to get 0 based indexing.
-      try {
-        tree.toggle(row.rowIndex - 1);
-      }  catch (e, stackTrace) {
-        Logger.root.warning('toggleExpanded', e, stackTrace);
-      }
-    }
-  }
-}