ash/metrics/desktop_task_switch_metric_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/desktop_task_switch_metric_recorder.h"
   6
   7 #include "ash/metrics/user_metrics_recorder.h"
   8 #include "ash/shell.h"
   9 #include "ash/wm/window_util.h"
  10 #include "ui/wm/public/activation_client.h"
  11
  12 namespace ash {
  13
  14 DesktopTaskSwitchMetricRecorder::DesktopTaskSwitchMetricRecorder()
  15     : last_active_task_window_(nullptr) {
  16   Shell::GetInstance()->activation_client()->AddObserver(this);
  17 }
  18
  19 DesktopTaskSwitchMetricRecorder::~DesktopTaskSwitchMetricRecorder() {
  20   Shell::GetInstance()->activation_client()->RemoveObserver(this);
  21 }
  22
  23 void DesktopTaskSwitchMetricRecorder::OnWindowActivated(
  24     aura::client::ActivationChangeObserver::ActivationReason reason,
  25     aura::Window* gained_active,
  26     aura::Window* lost_active) {
  27   if (gained_active && wm::IsWindowUserPositionable(gained_active)) {
  28     if (last_active_task_window_ != gained_active &&
  29         reason == aura::client::ActivationChangeObserver::ActivationReason::
  30                       INPUT_EVENT) {
  31       Shell::GetInstance()->metrics()->RecordUserMetricsAction(
  32           UMA_DESKTOP_SWITCH_TASK);
  33     }
  34     last_active_task_window_ = gained_active;
  35   }
  36 }
  37
  38 }  // namespace ash