1 files changed, 65 insertions, 0 deletions
diff --git a/ui/chromeos/user_activity_notifier.cc b/ui/chromeos/user_activity_notifier.cc
new file mode 100644
index 0000000..53f3129
--- /dev/null
+++ b/ui/chromeos/user_activity_notifier.cc
@@ -0,0 +1,65 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/chromeos/user_activity_notifier.h"
+
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/power_manager_client.h"
+#include "ui/events/event.h"
+#include "ui/events/event_constants.h"
+#include "ui/events/keycodes/keyboard_codes_posix.h"
+#include "ui/wm/core/user_activity_detector.h"
+
+namespace ui {
+namespace {
+
+// Minimum number of seconds between notifications.
+const int kNotifyIntervalSec = 5;
+
+// Returns a UserActivityType describing |event|.
+power_manager::UserActivityType GetUserActivityTypeForEvent(
+    const Event* event) {
+  if (!event || event->type() != ET_KEY_PRESSED)
+    return power_manager::USER_ACTIVITY_OTHER;
+
+  switch (static_cast<const KeyEvent*>(event)->key_code()) {
+    case VKEY_BRIGHTNESS_DOWN:
+      return power_manager::USER_ACTIVITY_BRIGHTNESS_DOWN_KEY_PRESS;
+    case VKEY_BRIGHTNESS_UP:
+      return power_manager::USER_ACTIVITY_BRIGHTNESS_UP_KEY_PRESS;
+    case VKEY_VOLUME_DOWN:
+      return power_manager::USER_ACTIVITY_VOLUME_DOWN_KEY_PRESS;
+    case VKEY_VOLUME_MUTE:
+      return power_manager::USER_ACTIVITY_VOLUME_MUTE_KEY_PRESS;
+    case VKEY_VOLUME_UP:
+      return power_manager::USER_ACTIVITY_VOLUME_UP_KEY_PRESS;
+    default:
+      return power_manager::USER_ACTIVITY_OTHER;
+  }
+}
+
+}  // namespace
+
+UserActivityNotifier::UserActivityNotifier(::wm::UserActivityDetector* detector)
+    : detector_(detector) {
+  detector_->AddObserver(this);
+}
+
+UserActivityNotifier::~UserActivityNotifier() {
+  detector_->RemoveObserver(this);
+}
+
+void UserActivityNotifier::OnUserActivity(const Event* event) {
+  base::TimeTicks now = base::TimeTicks::Now();
+  // InSeconds() truncates rather than rounding, so it's fine for this
+  // comparison.
+  if (last_notify_time_.is_null() ||
+      (now - last_notify_time_).InSeconds() >= kNotifyIntervalSec) {
+    chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
+        NotifyUserActivity(GetUserActivityTypeForEvent(event));
+    last_notify_time_ = now;
+  }
+}
+
+}  // namespace ui