ash/metrics/task_switch_metrics_recorder.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ash/metrics/task_switch_metrics_recorder.h"
   6
   7 #include "ash/metrics/task_switch_time_tracker.h"
   8
   9 namespace ash {
  10
  11 namespace {
  12
  13 const char kAshTaskSwitchHistogramName[] = "Ash.TimeBetweenTaskSwitches";
  14
  15 const char kDesktopHistogramName[] =
  16     "Ash.Desktop.TimeBetweenNavigateToTaskSwitches";
  17
  18 const char kShelfHistogramName[] =
  19     "Ash.Shelf.TimeBetweenNavigateToTaskSwitches";
  20
  21 const char kTabStripHistogramName[] =
  22     "Ash.Tab.TimeBetweenSwitchToExistingTabUserActions";
  23
  24 const char kAcceleratorWindowCycleHistogramName[] =
  25     "Ash.WindowCycleController.TimeBetweenTaskSwitches";
  26
  27 const char kAppListHistogramName[] = "Ash.AppList.TimeBetweenTaskSwitches";
  28
  29 const char kOverviewModeHistogramName[] =
  30     "Ash.WindowSelector.TimeBetweenActiveWindowChanges";
  31
  32 // Returns the histogram name for the given |task_switch_source|.
  33 const char* GetHistogramName(
  34     TaskSwitchMetricsRecorder::TaskSwitchSource task_switch_source) {
  35   switch (task_switch_source) {
  36     case TaskSwitchMetricsRecorder::ANY:
  37       return kAshTaskSwitchHistogramName;
  38     case TaskSwitchMetricsRecorder::APP_LIST:
  39       return kAppListHistogramName;
  40     case TaskSwitchMetricsRecorder::DESKTOP:
  41       return kDesktopHistogramName;
  42     case TaskSwitchMetricsRecorder::OVERVIEW_MODE:
  43       return kOverviewModeHistogramName;
  44     case TaskSwitchMetricsRecorder::SHELF:
  45       return kShelfHistogramName;
  46     case TaskSwitchMetricsRecorder::TAB_STRIP:
  47       return kTabStripHistogramName;
  48     case TaskSwitchMetricsRecorder::WINDOW_CYCLE_CONTROLLER:
  49       return kAcceleratorWindowCycleHistogramName;
  50   }
  51   NOTREACHED();
  52   return nullptr;
  53 }
  54
  55 }  // namespace
  56
  57 TaskSwitchMetricsRecorder::TaskSwitchMetricsRecorder() {
  58 }
  59
  60 TaskSwitchMetricsRecorder::~TaskSwitchMetricsRecorder() {
  61 }
  62
  63 void TaskSwitchMetricsRecorder::OnTaskSwitch(
  64     TaskSwitchSource task_switch_source) {
  65   DCHECK_NE(task_switch_source, ANY);
  66   if (task_switch_source != ANY) {
  67     OnTaskSwitchInternal(task_switch_source);
  68     OnTaskSwitchInternal(ANY);
  69   }
  70 }
  71
  72 void TaskSwitchMetricsRecorder::OnTaskSwitchInternal(
  73     TaskSwitchSource task_switch_source) {
  74   TaskSwitchTimeTracker* task_switch_time_tracker =
  75       FindTaskSwitchTimeTracker(task_switch_source);
  76   if (!task_switch_time_tracker)
  77     AddTaskSwitchTimeTracker(task_switch_source);
  78
  79   task_switch_time_tracker = FindTaskSwitchTimeTracker(task_switch_source);
  80   CHECK(task_switch_time_tracker);
  81
  82   task_switch_time_tracker->OnTaskSwitch();
  83 }
  84
  85 TaskSwitchTimeTracker* TaskSwitchMetricsRecorder::FindTaskSwitchTimeTracker(
  86     TaskSwitchSource task_switch_source) {
  87   return histogram_map_.get(task_switch_source);
  88 }
  89
  90 void TaskSwitchMetricsRecorder::AddTaskSwitchTimeTracker(
  91     TaskSwitchSource task_switch_source) {
  92   CHECK(histogram_map_.find(task_switch_source) == histogram_map_.end());
  93
  94   const char* histogram_name = GetHistogramName(task_switch_source);
  95   DCHECK(histogram_name);
  96
  97   histogram_map_.add(
  98       task_switch_source,
  99       make_scoped_ptr(new TaskSwitchTimeTracker(histogram_name)));
 100 }
 101
 102 }  // namespace ash