Move low battery notification to Message Center.

ash/system/chromeos/power/battery_notification.cc

Index: ash/system/chromeos/power/battery_notification.cc
diff --git a/ash/system/chromeos/power/battery_notification.cc b/ash/system/chromeos/power/battery_notification.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5ab80ebc99fd84c61e02fad87172b5fa52c8b4bd
--- /dev/null
+++ b/ash/system/chromeos/power/battery_notification.cc
@@ -0,0 +1,114 @@
+// Copyright 2015 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 "ash/system/chromeos/power/battery_notification.h"
+
+#include "ash/system/chromeos/power/power_status.h"
+#include "ash/system/system_notifier.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/time/time.h"
+#include "grit/ash_resources.h"
+#include "grit/ash_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/l10n/time_format.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image.h"
+#include "ui/message_center/message_center.h"
+#include "ui/message_center/notification.h"
+
+using message_center::MessageCenter;
+using message_center::Notification;
+
+namespace ash {
+
+namespace {
+
+const char kBatteryNotificationId[] = "battery";
+
+gfx::Image& GetBatteryImage(TrayPower::NotificationState notification_state) {
+  int resource_id;
+  if (PowerStatus::Get()->IsUsbChargerConnected()) {
+    resource_id = IDR_AURA_NOTIFICATION_BATTERY_FLUCTUATING;
+  } else if (notification_state == TrayPower::NOTIFICATION_LOW_POWER) {
+    resource_id = IDR_AURA_NOTIFICATION_BATTERY_LOW;
+  } else if (notification_state == TrayPower::NOTIFICATION_CRITICAL) {
+    resource_id = IDR_AURA_NOTIFICATION_BATTERY_CRITICAL;
+  } else {
+    NOTREACHED();
+    resource_id = 0;
+  }
+
+  return ui::ResourceBundle::GetSharedInstance().GetImageNamed(resource_id);
+}
+
+scoped_ptr<Notification> CreateNotification(
+    TrayPower::NotificationState notification_state) {
+  const PowerStatus& status = *PowerStatus::Get();
+
+  base::string16 message = l10n_util::GetStringFUTF16(
+      IDS_ASH_STATUS_TRAY_BATTERY_PERCENT,
+      base::IntToString16(status.GetRoundedBatteryPercent()));
+
+  const base::TimeDelta time = status.IsBatteryCharging()
+                                   ? status.GetBatteryTimeToFull()
+                                   : status.GetBatteryTimeToEmpty();
+  base::string16 time_message;
+  if (status.IsUsbChargerConnected()) {
+    time_message = l10n_util::GetStringUTF16(
+        IDS_ASH_STATUS_TRAY_BATTERY_CHARGING_UNRELIABLE);
+  } else if (PowerStatus::ShouldDisplayBatteryTime(time) &&
+             !status.IsBatteryDischargingOnLinePower()) {
+    int hour = 0, min = 0;
+    PowerStatus::SplitTimeIntoHoursAndMinutes(time, &hour, &min);
+    if (status.IsBatteryCharging()) {
+      time_message = l10n_util::GetStringFUTF16(
+          IDS_ASH_STATUS_TRAY_BATTERY_TIME_UNTIL_FULL,
+          base::IntToString16(hour), base::IntToString16(min));
+    } else {
+      // This is a low battery warning prompting the user in minutes.
+      time_message = ui::TimeFormat::Simple(
+          ui::TimeFormat::FORMAT_REMAINING, ui::TimeFormat::LENGTH_LONG,
+          base::TimeDelta::FromMinutes(hour * 60 + min));
+    }
+  }
+
+  if (!time_message.empty())
+    message = message + base::ASCIIToUTF16("\n") + time_message;
+
+  scoped_ptr<Notification> notification(new Notification(
+      message_center::NOTIFICATION_TYPE_SIMPLE, kBatteryNotificationId,
+      base::string16(), message, GetBatteryImage(notification_state),
+      base::string16(),
+      message_center::NotifierId(message_center::NotifierId::SYSTEM_COMPONENT,
+                                 system_notifier::kNotifierBattery),
+      message_center::RichNotificationData(), NULL));
+  notification->SetSystemPriority();
+  return notification;
+}
+
+}  // namespace
+
+BatteryNotification::BatteryNotification(
+    MessageCenter* message_center,
+    TrayPower::NotificationState notification_state)
+    : message_center_(message_center) {
+  message_center_->AddNotification(
+      CreateNotification(notification_state).Pass());
+}
+
+BatteryNotification::~BatteryNotification() {
+  if (message_center_->FindVisibleNotificationById(kBatteryNotificationId))
+    message_center_->RemoveNotification(kBatteryNotificationId, false);
+}
+
+void BatteryNotification::Update(
+    TrayPower::NotificationState notification_state) {
+  if (message_center_->FindVisibleNotificationById(kBatteryNotificationId)) {
+    message_center_->UpdateNotification(
+        kBatteryNotificationId, CreateNotification(notification_state).Pass());
+  }
+}
+
+}  // namespace ash