src/third_party/trace-viewer/trace_viewer/tracing/tracks/object_instance_group_track.html

   1 <!DOCTYPE html>
   2 <!--
   3 Copyright (c) 2013 The Chromium Authors. All rights reserved.
   4 Use of this source code is governed by a BSD-style license that can be
   5 found in the LICENSE file.
   6 -->
   7
   8 <link rel="import" href="/tracing/analysis/object_snapshot_view.html">
   9 <link rel="import" href="/tracing/analysis/object_instance_view.html">
  10 <link rel="import" href="/tracing/tracks/multi_row_track.html">
  11 <link rel="import" href="/tracing/tracks/object_instance_track.html">
  12 <link rel="import" href="/base/sorted_array_utils.html">
  13 <link rel="import" href="/base/ui.html">
  14 <script>
  15 'use strict';
  16
  17 tv.exportTo('tracing.tracks', function() {
  18   /**
  19    * A track that displays a ObjectInstanceGroup.
  20    * @constructor
  21    * @extends {ContainerTrack}
  22    */
  23   var ObjectInstanceGroupTrack = tv.ui.define(
  24       'object-instance-group-track', tracing.tracks.MultiRowTrack);
  25
  26   ObjectInstanceGroupTrack.prototype = {
  27
  28     __proto__: tracing.tracks.MultiRowTrack.prototype,
  29
  30     decorate: function(viewport) {
  31       tracing.tracks.MultiRowTrack.prototype.decorate.call(this, viewport);
  32       this.classList.add('object-instance-group-track');
  33       this.objectInstances_ = undefined;
  34     },
  35
  36     get objectInstances() {
  37       return this.itemsToGroup;
  38     },
  39
  40     set objectInstances(objectInstances) {
  41       this.setItemsToGroup(objectInstances);
  42     },
  43
  44     addSubTrack_: function(objectInstances) {
  45       var hasMultipleRows = this.subRows.length > 1;
  46       var track = new tracing.tracks.ObjectInstanceTrack(this.viewport);
  47       track.objectInstances = objectInstances;
  48       this.appendChild(track);
  49       return track;
  50     },
  51
  52     buildSubRows_: function(objectInstances) {
  53       objectInstances.sort(function(x, y) {
  54         return x.creationTs - y.creationTs;
  55       });
  56
  57       var subRows = [];
  58       for (var i = 0; i < objectInstances.length; i++) {
  59         var objectInstance = objectInstances[i];
  60
  61         var found = false;
  62         for (var j = 0; j < subRows.length; j++) {
  63           var subRow = subRows[j];
  64           var lastItemInSubRow = subRow[subRow.length - 1];
  65           if (objectInstance.creationTs >= lastItemInSubRow.deletionTs) {
  66             found = true;
  67             subRow.push(objectInstance);
  68             break;
  69           }
  70         }
  71         if (!found) {
  72           var subRow = [objectInstance];
  73           subRows.push(subRow);
  74         }
  75       }
  76       return subRows;
  77     },
  78     updateHeadingAndTooltip_: function() {
  79     }
  80   };
  81
  82   return {
  83     ObjectInstanceGroupTrack: ObjectInstanceGroupTrack
  84   };
  85 });
  86 </script>